feat(profiling)!: Add `BufWriter` for batching calls to `ZSTD_compressStream` in compressor by realFlowControl · Pull Request #1789 · DataDog/libdatadog

realFlowControl · 2026-03-25T10:56:56Z

What does this PR do?

This PR adds a benchmark for final profile serialization and wraps the profile compressor with a BufWriter sized to zstd's recommended input buffer size.

Motivation

PR #1696 applied the same idea to the in-memory timestamped observations compressor and improved the add_sample path. @ivoanjo reached out and asked me if the profile serializer could benefit from this as well.

The profile serializer has a similar write pattern: the protobuf encoder emits many small writes, including byte-at-a-time variant encoding, directly into the zstd encoder. I wanted to verify whether the same buffering approach would help there as well.

With the added benchmark, serialization of a profile with 1000 timestamped samples improved from about 640 µs to about 307 µs, which is roughly a 52.5% improvement on my machine.

Additional Notes

The PR is split into two commits:

Add a benchmark for compressed profile serialization
Add BufWriter to the profile compressor

How to test the change?

$ git checkout HEAD~1
$ cargo bench -p libdd-profiling -- profile_serialize_compressed_pprof_timestamped_x1000
[...]
$ git checkout florian/bufwriter-compressor
$ cargo bench -p libdd-profiling -- profile_serialize_compressed_pprof_timestamped_x1000
[...]
profile_serialize_compressed_pprof_timestamped_x1000
                        time:   [307.11 µs 308.48 µs 309.92 µs]
                        change: [-50.573% -50.374% -50.162%] (p = 0.00 < 0.05)
                        Performance has improved.

Co-Authored-By: GPT 5.4 <codex@openai.com>

github-actions · 2026-03-25T10:58:21Z

📚 Documentation Check Results

⚠️ 647 documentation warning(s) found

📦 `libdd-profiling` - 647 warning(s)

Updated: 2026-03-25 10:58:21 UTC | Commit: 7c6e5bf | missing-docs job results

github-actions · 2026-03-25T11:00:13Z

Clippy Allow Annotation Report

Comparing clippy allow annotations between branches:

Base Branch: origin/main
PR Branch: origin/florian/bufwriter-compressor

Summary by Rule

Rule	Base Branch	PR Branch	Change

Annotation Counts by File

File	Base Branch	PR Branch	Change

Annotation Stats by Crate

Crate	Base Branch	PR Branch	Change
`clippy-annotation-reporter`	5	5	No change (0%)
`datadog-ffe-ffi`	1	1	No change (0%)
`datadog-ipc`	20	20	No change (0%)
`datadog-live-debugger`	6	6	No change (0%)
`datadog-live-debugger-ffi`	10	10	No change (0%)
`datadog-profiling-replayer`	4	4	No change (0%)
`datadog-remote-config`	3	3	No change (0%)
`datadog-sidecar`	55	55	No change (0%)
`libdd-common`	10	10	No change (0%)
`libdd-common-ffi`	12	12	No change (0%)
`libdd-data-pipeline`	5	5	No change (0%)
`libdd-ddsketch`	2	2	No change (0%)
`libdd-dogstatsd-client`	1	1	No change (0%)
`libdd-profiling`	13	13	No change (0%)
`libdd-telemetry`	19	19	No change (0%)
`libdd-tinybytes`	4	4	No change (0%)
`libdd-trace-normalization`	2	2	No change (0%)
`libdd-trace-obfuscation`	8	8	No change (0%)
`libdd-trace-utils`	15	15	No change (0%)
Total	195	195	No change (0%)

About This Report

This report tracks Clippy allow annotations for specific rules, showing how they've changed in this PR. Decreasing the number of these annotations generally improves code quality.

github-actions · 2026-03-25T11:01:18Z

🔒 Cargo Deny Results

⚠️ 3 issue(s) found, showing only errors (advisories, bans, sources)

📦 `libdd-profiling` - 3 error(s)

Show output

error[vulnerability]: AWS-LC X.509 Name Constraints Bypass via Wildcard/Unicode CN
   ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:13:1
   │
13 │ aws-lc-sys 0.38.0 registry+https://github.com/rust-lang/crates.io-index
   │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
   │
   ├ ID: RUSTSEC-2026-0044
   ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0044
   ├ A logic error in CN (Common Name) validation allows certificates with
     wildcard or raw UTF-8 Unicode CN values to bypass name constraints
     enforcement. The `cn2dnsid` function does not recognize these CN patterns
     as valid DNS identifiers, causing `NAME_CONSTRAINTS_check_CN` to skip
     validation. However, `X509_check_host` accepts these CN values when no
     dNSName SAN is present, allowing certificates to bypass name constraints
     while still being used for hostname verification.
     
     Customers of AWS services do not need to take action. Applications using
     `aws-lc-sys` should upgrade to the most recent release of `aws-lc-sys`.
     
     ## Workarounds
     
     Applications that set `X509_CHECK_FLAG_NEVER_CHECK_SUBJECT` to disable CN
     fallback are not affected. Applications that only encounter certificates
     with dNSName SANs (standard for public WebPKI) are also not affected.
     
     Otherwise, there is no workaround and applications using `aws-lc-sys` should
     upgrade to the most recent releases of `aws-lc-sys`.
   ├ Solution: Upgrade to >=0.39.0 (try `cargo update -p aws-lc-sys`)
   ├ aws-lc-sys v0.38.0
     └── aws-lc-rs v1.16.1
         ├── rustls v0.23.37
         │   ├── hyper-rustls v0.27.7
         │   │   ├── libdd-common v3.0.1
         │   │   │   └── libdd-profiling v1.0.0
         │   │   │       └── (dev) libdd-profiling v1.0.0 (*)
         │   │   └── reqwest v0.13.2
         │   │       ├── libdd-common v3.0.1 (*)
         │   │       └── libdd-profiling v1.0.0 (*)
         │   ├── libdd-common v3.0.1 (*)
         │   ├── libdd-profiling v1.0.0 (*)
         │   ├── reqwest v0.13.2 (*)
         │   ├── rustls-platform-verifier v0.6.2
         │   │   ├── libdd-profiling v1.0.0 (*)
         │   │   └── reqwest v0.13.2 (*)
         │   └── tokio-rustls v0.26.0
         │       ├── hyper-rustls v0.27.7 (*)
         │       ├── libdd-common v3.0.1 (*)
         │       └── reqwest v0.13.2 (*)
         └── rustls-webpki v0.103.9
             ├── rustls v0.23.37 (*)
             └── rustls-platform-verifier v0.6.2 (*)

error[vulnerability]: CRL Distribution Point Scope Check Logic Error in AWS-LC
   ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:13:1
   │
13 │ aws-lc-sys 0.38.0 registry+https://github.com/rust-lang/crates.io-index
   │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
   │
   ├ ID: RUSTSEC-2026-0048
   ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0048
   ├ A logic error in CRL distribution point matching in AWS-LC allows a revoked
     certificate to bypass revocation checks during certificate validation, when
     the application enables CRL checking and uses partitioned CRLs with Issuing
     Distribution Point (IDP) extensions.
     
     Customers of AWS services do not need to take action. `aws-lc-sys` contains
     code from AWS-LC. Applications using `aws-lc-sys` should upgrade to the most
     recent release of `aws-lc-sys`.
     
     ## Workarounds
     
     Applications can workaround this issue if they do not enable CRL checking
     (`X509_V_FLAG_CRL_CHECK`). Applications using complete (non-partitioned)
     CRLs without IDP extensions are also not affected.
     
     Otherwise, there is no workaround and applications using `aws-lc-sys` should
     upgrade to the most recent releases of `aws-lc-sys`.
   ├ Announcement: https://aws.amazon.com/security/security-bulletins/2026-010-AWS
   ├ Solution: Upgrade to >=0.39.0 (try `cargo update -p aws-lc-sys`)
   ├ aws-lc-sys v0.38.0
     └── aws-lc-rs v1.16.1
         ├── rustls v0.23.37
         │   ├── hyper-rustls v0.27.7
         │   │   ├── libdd-common v3.0.1
         │   │   │   └── libdd-profiling v1.0.0
         │   │   │       └── (dev) libdd-profiling v1.0.0 (*)
         │   │   └── reqwest v0.13.2
         │   │       ├── libdd-common v3.0.1 (*)
         │   │       └── libdd-profiling v1.0.0 (*)
         │   ├── libdd-common v3.0.1 (*)
         │   ├── libdd-profiling v1.0.0 (*)
         │   ├── reqwest v0.13.2 (*)
         │   ├── rustls-platform-verifier v0.6.2
         │   │   ├── libdd-profiling v1.0.0 (*)
         │   │   └── reqwest v0.13.2 (*)
         │   └── tokio-rustls v0.26.0
         │       ├── hyper-rustls v0.27.7 (*)
         │       ├── libdd-common v3.0.1 (*)
         │       └── reqwest v0.13.2 (*)
         └── rustls-webpki v0.103.9
             ├── rustls v0.23.37 (*)
             └── rustls-platform-verifier v0.6.2 (*)

error[vulnerability]: CRLs not considered authoritative by Distribution Point due to faulty matching logic
    ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:193:1
    │
193 │ rustls-webpki 0.103.9 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
    │
    ├ ID: RUSTSEC-2026-0049
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0049
    ├ If a certificate had more than one `distributionPoint`, then only the first `distributionPoint` would be considered against each CRL's `IssuingDistributionPoint` `distributionPoint`, and then the certificate's subsequent `distributionPoint`s would be ignored.
      
      The impact was that correctly provided CRLs would not be consulted to check revocation. With `UnknownStatusPolicy::Deny` (the default) this would lead to incorrect but safe `Error::UnknownRevocationStatus`. With `UnknownStatusPolicy::Allow` this would lead to inappropriate acceptance of revoked certificates.
      
      This vulnerability is thought to be of limited impact. This is because both the certificate and CRL are signed -- an attacker would need to compromise a trusted issuing authority to trigger this bug.  An attacker with such capabilities could likely bypass revocation checking through other more impactful means (such as publishing a valid, empty CRL.)
      
      More likely, this bug would be latent in normal use, and an attacker could leverage faulty revocation checking to continue using a revoked credential.
      
      This vulnerability is identified as [GHSA-pwjx-qhcg-rvj4](https://github.com/rustls/webpki/security/advisories/GHSA-pwjx-qhcg-rvj4). Thank you to @1seal for the report.
    ├ Solution: Upgrade to >=0.103.10 (try `cargo update -p rustls-webpki`)
    ├ rustls-webpki v0.103.9
      ├── rustls v0.23.37
      │   ├── hyper-rustls v0.27.7
      │   │   ├── libdd-common v3.0.1
      │   │   │   └── libdd-profiling v1.0.0
      │   │   │       └── (dev) libdd-profiling v1.0.0 (*)
      │   │   └── reqwest v0.13.2
      │   │       ├── libdd-common v3.0.1 (*)
      │   │       └── libdd-profiling v1.0.0 (*)
      │   ├── libdd-common v3.0.1 (*)
      │   ├── libdd-profiling v1.0.0 (*)
      │   ├── reqwest v0.13.2 (*)
      │   ├── rustls-platform-verifier v0.6.2
      │   │   ├── libdd-profiling v1.0.0 (*)
      │   │   └── reqwest v0.13.2 (*)
      │   └── tokio-rustls v0.26.0
      │       ├── hyper-rustls v0.27.7 (*)
      │       ├── libdd-common v3.0.1 (*)
      │       └── reqwest v0.13.2 (*)
      └── rustls-platform-verifier v0.6.2 (*)

advisories FAILED, bans ok, sources ok

Updated: 2026-03-25 11:01:17 UTC | Commit: 7c6e5bf | dependency-check job results

ivoanjo · 2026-03-25T11:04:37Z

Booyah really cool thanks for looking into this!

pr-commenter · 2026-03-25T11:07:07Z

Benchmarks

Comparison

Benchmark execution time: 2026-03-25 11:06:34

Comparing candidate commit 8683969 in PR branch florian/bufwriter-compressor with baseline commit c664ed7 in branch main.

Found 2 performance improvements and 2 performance regressions! Performance is the same for 57 metrics, 0 unstable metrics.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

🟩 = significantly better candidate vs. baseline
🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

scenario:normalization/normalize_name/normalize_name/Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Lo...

🟩 execution_time [-9.467µs; -8.485µs] or [-4.852%; -4.348%]
🟩 throughput [+232015.319op/s; +258755.120op/s] or [+4.526%; +5.047%]

scenario:receiver_entry_point/report/2598

🟥 execution_time [+198.988µs; +207.149µs] or [+5.775%; +6.012%]

scenario:two way interface

🟥 execution_time [+1.647µs; +1.800µs] or [+11.806%; +12.904%]

Candidate

Candidate benchmark details

Group 1

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
redis/obfuscate_redis_string	execution_time	34.299µs	34.859µs ± 0.885µs	34.459µs ± 0.092µs	34.594µs	36.738µs	36.779µs	37.994µs	10.26%	1.715	1.175	2.53%	0.063µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
redis/obfuscate_redis_string	execution_time	[34.737µs; 34.982µs] or [-0.352%; +0.352%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
tags/replace_trace_tags	execution_time	2.317µs	2.368µs ± 0.014µs	2.367µs ± 0.004µs	2.372µs	2.403µs	2.411µs	2.412µs	1.92%	0.411	3.002	0.59%	0.001µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
tags/replace_trace_tags	execution_time	[2.366µs; 2.370µs] or [-0.083%; +0.083%]	None	None	None

Group 3

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
normalization/normalize_service/normalize_service/A0000000000000000000000000000000000000000000000000...	execution_time	495.622µs	496.555µs ± 0.821µs	496.359µs ± 0.232µs	496.630µs	497.909µs	499.664µs	503.585µs	1.46%	4.323	28.379	0.16%	0.058µs	1	200
normalization/normalize_service/normalize_service/A0000000000000000000000000000000000000000000000000...	throughput	1985762.962op/s	2013881.740op/s ± 3304.661op/s	2014671.510op/s ± 942.014op/s	2015501.559op/s	2016454.301op/s	2017129.143op/s	2017668.725op/s	0.15%	-4.266	27.678	0.16%	233.675op/s	1	200
normalization/normalize_service/normalize_service/Data🐨dog🐶 繋がっ⛰てて	execution_time	371.216µs	371.861µs ± 0.255µs	371.846µs ± 0.184µs	372.040µs	372.271µs	372.489µs	372.556µs	0.19%	0.161	-0.413	0.07%	0.018µs	1	200
normalization/normalize_service/normalize_service/Data🐨dog🐶 繋がっ⛰てて	throughput	2684160.547op/s	2689175.129op/s ± 1844.220op/s	2689286.764op/s ± 1334.005op/s	2690566.698op/s	2692048.864op/s	2692653.798op/s	2693849.719op/s	0.17%	-0.158	-0.415	0.07%	130.406op/s	1	200
normalization/normalize_service/normalize_service/Test Conversion 0f Weird !@#$%^&**() Characters	execution_time	167.995µs	168.364µs ± 0.139µs	168.361µs ± 0.104µs	168.459µs	168.597µs	168.669µs	168.699µs	0.20%	0.096	-0.392	0.08%	0.010µs	1	200
normalization/normalize_service/normalize_service/Test Conversion 0f Weird !@#$%^&**() Characters	throughput	5927728.854op/s	5939504.530op/s ± 4919.801op/s	5939626.870op/s ± 3663.901op/s	5943324.869op/s	5947530.842op/s	5949534.170op/s	5952552.344op/s	0.22%	-0.093	-0.392	0.08%	347.882op/s	1	200
normalization/normalize_service/normalize_service/[empty string]	execution_time	36.855µs	37.039µs ± 0.112µs	37.049µs ± 0.094µs	37.129µs	37.211µs	37.269µs	37.283µs	0.63%	0.010	-1.139	0.30%	0.008µs	1	200
normalization/normalize_service/normalize_service/[empty string]	throughput	26821970.695op/s	26998544.416op/s ± 81902.605op/s	26991615.548op/s ± 68232.043op/s	27082001.869op/s	27117710.732op/s	27127407.435op/s	27133228.212op/s	0.52%	-0.003	-1.144	0.30%	5791.389op/s	1	200
normalization/normalize_service/normalize_service/test_ASCII	execution_time	46.294µs	46.434µs ± 0.111µs	46.425µs ± 0.034µs	46.463µs	46.525µs	46.546µs	47.807µs	2.98%	9.618	117.254	0.24%	0.008µs	1	200
normalization/normalize_service/normalize_service/test_ASCII	throughput	20917458.315op/s	21535926.306op/s ± 50132.297op/s	21540319.529op/s ± 15905.813op/s	21553731.901op/s	21579724.841op/s	21593484.211op/s	21601071.413op/s	0.28%	-9.428	114.145	0.23%	3544.889op/s	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
normalization/normalize_service/normalize_service/A0000000000000000000000000000000000000000000000000...	execution_time	[496.441µs; 496.669µs] or [-0.023%; +0.023%]	None	None	None
normalization/normalize_service/normalize_service/A0000000000000000000000000000000000000000000000000...	throughput	[2013423.745op/s; 2014339.734op/s] or [-0.023%; +0.023%]	None	None	None
normalization/normalize_service/normalize_service/Data🐨dog🐶 繋がっ⛰てて	execution_time	[371.826µs; 371.897µs] or [-0.010%; +0.010%]	None	None	None
normalization/normalize_service/normalize_service/Data🐨dog🐶 繋がっ⛰てて	throughput	[2688919.538op/s; 2689430.720op/s] or [-0.010%; +0.010%]	None	None	None
normalization/normalize_service/normalize_service/Test Conversion 0f Weird !@#$%^&**() Characters	execution_time	[168.345µs; 168.384µs] or [-0.011%; +0.011%]	None	None	None
normalization/normalize_service/normalize_service/Test Conversion 0f Weird !@#$%^&**() Characters	throughput	[5938822.693op/s; 5940186.367op/s] or [-0.011%; +0.011%]	None	None	None
normalization/normalize_service/normalize_service/[empty string]	execution_time	[37.024µs; 37.055µs] or [-0.042%; +0.042%]	None	None	None
normalization/normalize_service/normalize_service/[empty string]	throughput	[26987193.502op/s; 27009895.329op/s] or [-0.042%; +0.042%]	None	None	None
normalization/normalize_service/normalize_service/test_ASCII	execution_time	[46.419µs; 46.450µs] or [-0.033%; +0.033%]	None	None	None
normalization/normalize_service/normalize_service/test_ASCII	throughput	[21528978.452op/s; 21542874.160op/s] or [-0.032%; +0.032%]	None	None	None

Group 4

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
profile_add_sample_frames_x1000	execution_time	4.127ms	4.135ms ± 0.005ms	4.135ms ± 0.001ms	4.136ms	4.138ms	4.166ms	4.167ms	0.78%	4.266	20.861	0.13%	0.000ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
profile_add_sample_frames_x1000	execution_time	[4.134ms; 4.136ms] or [-0.018%; +0.018%]	None	None	None

Group 5

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
sdk_test_data/rules-based	execution_time	144.555µs	146.892µs ± 1.634µs	146.611µs ± 0.440µs	147.075µs	148.374µs	152.426µs	163.092µs	11.24%	6.025	50.794	1.11%	0.116µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
sdk_test_data/rules-based	execution_time	[146.665µs; 147.118µs] or [-0.154%; +0.154%]	None	None	None

Group 6

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
benching serializing traces from their internal representation to msgpack	execution_time	13.955ms	14.007ms ± 0.031ms	14.002ms ± 0.012ms	14.015ms	14.044ms	14.138ms	14.186ms	1.31%	2.836	11.696	0.22%	0.002ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
benching serializing traces from their internal representation to msgpack	execution_time	[14.003ms; 14.011ms] or [-0.031%; +0.031%]	None	None	None

Group 7

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
ip_address/quantize_peer_ip_address_benchmark	execution_time	4.969µs	5.041µs ± 0.047µs	5.042µs ± 0.042µs	5.077µs	5.119µs	5.122µs	5.125µs	1.64%	0.209	-1.249	0.92%	0.003µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
ip_address/quantize_peer_ip_address_benchmark	execution_time	[5.035µs; 5.048µs] or [-0.128%; +0.128%]	None	None	None

Group 8

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
profile_add_sample2_frames_x1000	execution_time	738.092µs	739.261µs ± 0.675µs	739.173µs ± 0.294µs	739.487µs	740.032µs	742.164µs	743.046µs	0.52%	2.380	9.248	0.09%	0.048µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
profile_add_sample2_frames_x1000	execution_time	[739.167µs; 739.354µs] or [-0.013%; +0.013%]	None	None	None

Group 9

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
two way interface	execution_time	14.072µs	15.670µs ± 0.550µs	15.703µs ± 0.217µs	15.917µs	16.381µs	16.892µs	16.959µs	8.00%	-1.082	2.887	3.50%	0.039µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
two way interface	execution_time	[15.593µs; 15.746µs] or [-0.486%; +0.486%]	None	None	None

Group 10

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
write only interface	execution_time	5.508µs	5.556µs ± 0.023µs	5.552µs ± 0.010µs	5.564µs	5.593µs	5.638µs	5.685µs	2.38%	1.855	6.459	0.41%	0.002µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
write only interface	execution_time	[5.553µs; 5.559µs] or [-0.057%; +0.057%]	None	None	None

Group 11

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
normalization/normalize_trace/test_trace	execution_time	244.931ns	255.400ns ± 12.978ns	249.433ns ± 2.869ns	258.135ns	286.659ns	298.016ns	299.145ns	19.93%	1.956	3.083	5.07%	0.918ns	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
normalization/normalize_trace/test_trace	execution_time	[253.602ns; 257.199ns] or [-0.704%; +0.704%]	None	None	None

Group 12

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
concentrator/add_spans_to_concentrator	execution_time	13.012ms	13.045ms ± 0.014ms	13.044ms ± 0.009ms	13.053ms	13.069ms	13.081ms	13.086ms	0.32%	0.386	0.073	0.11%	0.001ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
concentrator/add_spans_to_concentrator	execution_time	[13.043ms; 13.047ms] or [-0.015%; +0.015%]	None	None	None

Group 13

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
sql/obfuscate_sql_string	execution_time	286.081µs	286.631µs ± 0.746µs	286.542µs ± 0.174µs	286.698µs	287.058µs	288.443µs	295.860µs	3.25%	9.873	116.578	0.26%	0.053µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
sql/obfuscate_sql_string	execution_time	[286.528µs; 286.735µs] or [-0.036%; +0.036%]	None	None	None

Group 14

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
receiver_entry_point/report/2598	execution_time	3.607ms	3.649ms ± 0.020ms	3.644ms ± 0.013ms	3.664ms	3.684ms	3.698ms	3.717ms	2.02%	0.546	-0.043	0.55%	0.001ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
receiver_entry_point/report/2598	execution_time	[3.646ms; 3.652ms] or [-0.076%; +0.076%]	None	None	None

Group 15

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
single_flag_killswitch/rules-based	execution_time	190.150ns	192.182ns ± 1.990ns	192.027ns ± 1.444ns	193.021ns	196.200ns	198.430ns	201.178ns	4.77%	1.395	2.271	1.03%	0.141ns	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
single_flag_killswitch/rules-based	execution_time	[191.906ns; 192.458ns] or [-0.144%; +0.144%]	None	None	None

Group 16

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
profile_add_sample_timestamped_x1000	execution_time	4.208ms	4.216ms ± 0.009ms	4.215ms ± 0.002ms	4.217ms	4.220ms	4.225ms	4.334ms	2.82%	11.548	148.869	0.21%	0.001ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
profile_add_sample_timestamped_x1000	execution_time	[4.214ms; 4.217ms] or [-0.030%; +0.030%]	None	None	None

Group 17

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
benching string interning on wordpress profile	execution_time	161.374µs	162.260µs ± 0.657µs	161.993µs ± 0.381µs	162.897µs	163.393µs	163.829µs	164.497µs	1.55%	0.751	-0.460	0.40%	0.046µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
benching string interning on wordpress profile	execution_time	[162.169µs; 162.351µs] or [-0.056%; +0.056%]	None	None	None

Group 18

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
benching deserializing traces from msgpack to their internal representation	execution_time	49.955ms	50.283ms ± 1.245ms	50.101ms ± 0.052ms	50.170ms	50.449ms	57.625ms	61.746ms	23.24%	8.114	66.355	2.47%	0.088ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
benching deserializing traces from msgpack to their internal representation	execution_time	[50.111ms; 50.456ms] or [-0.343%; +0.343%]	None	None	None

Group 19

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
profile_serialize_compressed_pprof_timestamped_x1000	execution_time	912.177µs	913.902µs ± 1.103µs	913.647µs ± 0.664µs	914.482µs	916.259µs	916.858µs	917.334µs	0.40%	0.949	0.483	0.12%	0.078µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
profile_serialize_compressed_pprof_timestamped_x1000	execution_time	[913.749µs; 914.054µs] or [-0.017%; +0.017%]	None	None	None

Group 20

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
credit_card/is_card_number/	execution_time	3.894µs	3.916µs ± 0.006µs	3.916µs ± 0.002µs	3.918µs	3.921µs	3.924µs	3.968µs	1.33%	5.447	48.579	0.14%	0.000µs	1	200
credit_card/is_card_number/	throughput	252022890.583op/s	255349653.005op/s ± 361598.739op/s	255369238.182op/s ± 114525.981op/s	255497841.046op/s	255660323.328op/s	255787501.067op/s	256838152.458op/s	0.58%	-5.358	47.765	0.14%	25568.892op/s	1	200
credit_card/is_card_number/ 3782-8224-6310-005	execution_time	79.430µs	80.217µs ± 0.181µs	80.240µs ± 0.076µs	80.305µs	80.376µs	80.436µs	81.625µs	1.73%	1.111	20.484	0.22%	0.013µs	1	200
credit_card/is_card_number/ 3782-8224-6310-005	throughput	12251106.520op/s	12466308.450op/s ± 28036.036op/s	12462661.244op/s ± 11847.859op/s	12476455.061op/s	12501410.097op/s	12558713.456op/s	12589659.780op/s	1.02%	-0.970	19.609	0.22%	1982.447op/s	1	200
credit_card/is_card_number/ 378282246310005	execution_time	67.803µs	67.952µs ± 0.079µs	67.946µs ± 0.039µs	67.983µs	68.051µs	68.205µs	68.587µs	0.94%	3.250	21.461	0.12%	0.006µs	1	200
credit_card/is_card_number/ 378282246310005	throughput	14579923.347op/s	14716252.910op/s ± 16972.627op/s	14717574.226op/s ± 8371.203op/s	14726067.413op/s	14736249.144op/s	14740291.373op/s	14748527.639op/s	0.21%	-3.206	21.006	0.12%	1200.146op/s	1	200
credit_card/is_card_number/37828224631	execution_time	3.897µs	3.913µs ± 0.002µs	3.913µs ± 0.001µs	3.915µs	3.917µs	3.918µs	3.919µs	0.14%	-1.721	14.113	0.06%	0.000µs	1	200
credit_card/is_card_number/37828224631	throughput	255194634.101op/s	255530400.314op/s ± 143273.021op/s	255542138.899op/s ± 78516.918op/s	255607898.485op/s	255699041.319op/s	255777083.204op/s	256599528.982op/s	0.41%	1.743	14.298	0.06%	10130.933op/s	1	200
credit_card/is_card_number/378282246310005	execution_time	64.849µs	64.940µs ± 0.053µs	64.929µs ± 0.024µs	64.960µs	65.015µs	65.186µs	65.258µs	0.51%	2.809	13.023	0.08%	0.004µs	1	200
credit_card/is_card_number/378282246310005	throughput	15323835.653op/s	15398821.153op/s ± 12434.791op/s	15401321.423op/s ± 5605.332op/s	15405848.313op/s	15411816.208op/s	15415106.240op/s	15420493.478op/s	0.12%	-2.792	12.895	0.08%	879.272op/s	1	200
credit_card/is_card_number/37828224631000521389798	execution_time	45.421µs	45.666µs ± 0.073µs	45.663µs ± 0.047µs	45.709µs	45.795µs	45.846µs	45.856µs	0.42%	0.217	0.189	0.16%	0.005µs	1	200
credit_card/is_card_number/37828224631000521389798	throughput	21807241.432op/s	21898010.312op/s ± 34903.449op/s	21899555.516op/s ± 22561.778op/s	21922265.839op/s	21948955.956op/s	21966898.632op/s	22016404.423op/s	0.53%	-0.207	0.193	0.16%	2468.047op/s	1	200
credit_card/is_card_number/x371413321323331	execution_time	6.828µs	6.838µs ± 0.012µs	6.837µs ± 0.002µs	6.839µs	6.844µs	6.852µs	6.954µs	1.72%	8.240	74.761	0.17%	0.001µs	1	200
credit_card/is_card_number/x371413321323331	throughput	143799287.255op/s	146248365.955op/s ± 252341.971op/s	146268559.573op/s ± 49298.524op/s	146319497.073op/s	146414069.010op/s	146441394.294op/s	146454949.336op/s	0.13%	-8.193	74.175	0.17%	17843.272op/s	1	200
credit_card/is_card_number_no_luhn/	execution_time	3.892µs	3.914µs ± 0.003µs	3.914µs ± 0.001µs	3.915µs	3.918µs	3.920µs	3.921µs	0.19%	-2.195	19.797	0.07%	0.000µs	1	200
credit_card/is_card_number_no_luhn/	throughput	255038813.314op/s	255489875.581op/s ± 175261.045op/s	255511498.017op/s ± 86856.236op/s	255585276.041op/s	255685873.403op/s	255757955.539op/s	256907183.406op/s	0.55%	2.230	20.121	0.07%	12392.827op/s	1	200
credit_card/is_card_number_no_luhn/ 3782-8224-6310-005	execution_time	65.415µs	65.768µs ± 0.062µs	65.774µs ± 0.032µs	65.806µs	65.849µs	65.890µs	65.959µs	0.28%	-1.566	7.490	0.09%	0.004µs	1	200
credit_card/is_card_number_no_luhn/ 3782-8224-6310-005	throughput	15161029.456op/s	15204890.591op/s ± 14302.705op/s	15203572.860op/s ± 7382.966op/s	15210925.202op/s	15224451.780op/s	15248948.157op/s	15287016.737op/s	0.55%	1.586	7.590	0.09%	1011.354op/s	1	200
credit_card/is_card_number_no_luhn/ 378282246310005	execution_time	53.353µs	53.421µs ± 0.031µs	53.415µs ± 0.018µs	53.438µs	53.482µs	53.512µs	53.540µs	0.23%	0.946	1.616	0.06%	0.002µs	1	200
credit_card/is_card_number_no_luhn/ 378282246310005	throughput	18677765.233op/s	18719126.193op/s ± 10969.628op/s	18721236.018op/s ± 6170.767op/s	18726194.450op/s	18734603.682op/s	18740183.138op/s	18742920.310op/s	0.12%	-0.941	1.603	0.06%	775.670op/s	1	200
credit_card/is_card_number_no_luhn/37828224631	execution_time	3.892µs	3.914µs ± 0.003µs	3.914µs ± 0.002µs	3.916µs	3.919µs	3.922µs	3.925µs	0.28%	-1.254	13.229	0.08%	0.000µs	1	200
credit_card/is_card_number_no_luhn/37828224631	throughput	254784260.057op/s	255485909.469op/s ± 201543.733op/s	255498403.136op/s ± 101779.355op/s	255599178.871op/s	255733866.064op/s	255782665.723op/s	256946118.449op/s	0.57%	1.286	13.456	0.08%	14251.294op/s	1	200
credit_card/is_card_number_no_luhn/378282246310005	execution_time	50.154µs	50.211µs ± 0.031µs	50.210µs ± 0.022µs	50.231µs	50.262µs	50.294µs	50.313µs	0.21%	0.460	0.082	0.06%	0.002µs	1	200
credit_card/is_card_number_no_luhn/378282246310005	throughput	19875418.887op/s	19915782.821op/s ± 12356.137op/s	19916329.508op/s ± 8639.038op/s	19925001.795op/s	19933288.670op/s	19938554.082op/s	19938760.092op/s	0.11%	-0.456	0.076	0.06%	873.711op/s	1	200
credit_card/is_card_number_no_luhn/37828224631000521389798	execution_time	45.435µs	45.644µs ± 0.077µs	45.638µs ± 0.046µs	45.700µs	45.771µs	45.811µs	45.823µs	0.41%	-0.044	-0.308	0.17%	0.005µs	1	200
credit_card/is_card_number_no_luhn/37828224631000521389798	throughput	21823054.311op/s	21908668.993op/s ± 36971.201op/s	21911571.472op/s ± 21900.333op/s	21931041.131op/s	21968343.946op/s	21997835.727op/s	22009272.507op/s	0.45%	0.053	-0.304	0.17%	2614.259op/s	1	200
credit_card/is_card_number_no_luhn/x371413321323331	execution_time	6.827µs	6.835µs ± 0.004µs	6.835µs ± 0.002µs	6.838µs	6.842µs	6.846µs	6.848µs	0.19%	0.521	0.268	0.06%	0.000µs	1	200
credit_card/is_card_number_no_luhn/x371413321323331	throughput	146024204.086op/s	146302458.462op/s ± 81250.667op/s	146308602.946op/s ± 51441.262op/s	146357910.169op/s	146425187.678op/s	146447883.811op/s	146475536.283op/s	0.11%	-0.518	0.262	0.06%	5745.290op/s	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
credit_card/is_card_number/	execution_time	[3.915µs; 3.917µs] or [-0.020%; +0.020%]	None	None	None
credit_card/is_card_number/	throughput	[255299538.897op/s; 255399767.113op/s] or [-0.020%; +0.020%]	None	None	None
credit_card/is_card_number/ 3782-8224-6310-005	execution_time	[80.192µs; 80.242µs] or [-0.031%; +0.031%]	None	None	None
credit_card/is_card_number/ 3782-8224-6310-005	throughput	[12462422.925op/s; 12470193.975op/s] or [-0.031%; +0.031%]	None	None	None
credit_card/is_card_number/ 378282246310005	execution_time	[67.941µs; 67.963µs] or [-0.016%; +0.016%]	None	None	None
credit_card/is_card_number/ 378282246310005	throughput	[14713900.667op/s; 14718605.153op/s] or [-0.016%; +0.016%]	None	None	None
credit_card/is_card_number/37828224631	execution_time	[3.913µs; 3.914µs] or [-0.008%; +0.008%]	None	None	None
credit_card/is_card_number/37828224631	throughput	[255510544.051op/s; 255550256.576op/s] or [-0.008%; +0.008%]	None	None	None
credit_card/is_card_number/378282246310005	execution_time	[64.933µs; 64.947µs] or [-0.011%; +0.011%]	None	None	None
credit_card/is_card_number/378282246310005	throughput	[15397097.811op/s; 15400544.496op/s] or [-0.011%; +0.011%]	None	None	None
credit_card/is_card_number/37828224631000521389798	execution_time	[45.656µs; 45.676µs] or [-0.022%; +0.022%]	None	None	None
credit_card/is_card_number/37828224631000521389798	throughput	[21893173.030op/s; 21902847.594op/s] or [-0.022%; +0.022%]	None	None	None
credit_card/is_card_number/x371413321323331	execution_time	[6.836µs; 6.839µs] or [-0.024%; +0.024%]	None	None	None
credit_card/is_card_number/x371413321323331	throughput	[146213393.785op/s; 146283338.126op/s] or [-0.024%; +0.024%]	None	None	None
credit_card/is_card_number_no_luhn/	execution_time	[3.914µs; 3.914µs] or [-0.009%; +0.009%]	None	None	None
credit_card/is_card_number_no_luhn/	throughput	[255465586.086op/s; 255514165.077op/s] or [-0.010%; +0.010%]	None	None	None
credit_card/is_card_number_no_luhn/ 3782-8224-6310-005	execution_time	[65.760µs; 65.777µs] or [-0.013%; +0.013%]	None	None	None
credit_card/is_card_number_no_luhn/ 3782-8224-6310-005	throughput	[15202908.373op/s; 15206872.808op/s] or [-0.013%; +0.013%]	None	None	None
credit_card/is_card_number_no_luhn/ 378282246310005	execution_time	[53.417µs; 53.426µs] or [-0.008%; +0.008%]	None	None	None
credit_card/is_card_number_no_luhn/ 378282246310005	throughput	[18717605.908op/s; 18720646.478op/s] or [-0.008%; +0.008%]	None	None	None
credit_card/is_card_number_no_luhn/37828224631	execution_time	[3.914µs; 3.915µs] or [-0.011%; +0.011%]	None	None	None
credit_card/is_card_number_no_luhn/37828224631	throughput	[255457977.446op/s; 255513841.492op/s] or [-0.011%; +0.011%]	None	None	None
credit_card/is_card_number_no_luhn/378282246310005	execution_time	[50.207µs; 50.216µs] or [-0.009%; +0.009%]	None	None	None
credit_card/is_card_number_no_luhn/378282246310005	throughput	[19914070.379op/s; 19917495.263op/s] or [-0.009%; +0.009%]	None	None	None
credit_card/is_card_number_no_luhn/37828224631000521389798	execution_time	[45.633µs; 45.655µs] or [-0.023%; +0.023%]	None	None	None
credit_card/is_card_number_no_luhn/37828224631000521389798	throughput	[21903545.140op/s; 21913792.846op/s] or [-0.023%; +0.023%]	None	None	None
credit_card/is_card_number_no_luhn/x371413321323331	execution_time	[6.835µs; 6.836µs] or [-0.008%; +0.008%]	None	None	None
credit_card/is_card_number_no_luhn/x371413321323331	throughput	[146291197.901op/s; 146313719.023op/s] or [-0.008%; +0.008%]	None	None	None

Group 21

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8683969`	1774435693	florian/bufwriter-compressor

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
normalization/normalize_name/normalize_name/Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Lo...	execution_time	185.709µs	186.156µs ± 0.329µs	186.075µs ± 0.142µs	186.268µs	186.650µs	187.744µs	188.316µs	1.20%	2.942	13.562	0.18%	0.023µs	1	200
normalization/normalize_name/normalize_name/Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Lo...	throughput	5310220.422op/s	5371850.641op/s ± 9450.628op/s	5374174.913op/s ± 4118.081op/s	5377355.050op/s	5381248.183op/s	5384011.106op/s	5384769.368op/s	0.20%	-2.906	13.273	0.18%	668.260op/s	1	200
normalization/normalize_name/normalize_name/bad-name	execution_time	17.810µs	17.879µs ± 0.030µs	17.879µs ± 0.015µs	17.897µs	17.921µs	17.953µs	17.968µs	0.50%	-0.023	0.625	0.16%	0.002µs	1	200
normalization/normalize_name/normalize_name/bad-name	throughput	55653169.448op/s	55931926.018op/s ± 92435.421op/s	55931303.203op/s ± 48290.418op/s	55975035.135op/s	56119377.143op/s	56130856.233op/s	56147330.595op/s	0.39%	0.036	0.615	0.16%	6536.171op/s	1	200
normalization/normalize_name/normalize_name/good	execution_time	10.575µs	10.629µs ± 0.022µs	10.626µs ± 0.015µs	10.648µs	10.664µs	10.676µs	10.708µs	0.77%	0.283	0.242	0.21%	0.002µs	1	200
normalization/normalize_name/normalize_name/good	throughput	93385191.817op/s	94079218.983op/s ± 198760.453op/s	94107268.640op/s ± 134361.341op/s	94213764.560op/s	94369144.985op/s	94500409.448op/s	94565651.301op/s	0.49%	-0.270	0.223	0.21%	14054.486op/s	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
normalization/normalize_name/normalize_name/Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Lo...	execution_time	[186.111µs; 186.202µs] or [-0.025%; +0.025%]	None	None	None
normalization/normalize_name/normalize_name/Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Lo...	throughput	[5370540.875op/s; 5373160.407op/s] or [-0.024%; +0.024%]	None	None	None
normalization/normalize_name/normalize_name/bad-name	execution_time	[17.875µs; 17.883µs] or [-0.023%; +0.023%]	None	None	None
normalization/normalize_name/normalize_name/bad-name	throughput	[55919115.358op/s; 55944736.678op/s] or [-0.023%; +0.023%]	None	None	None
normalization/normalize_name/normalize_name/good	execution_time	[10.626µs; 10.633µs] or [-0.029%; +0.029%]	None	None	None
normalization/normalize_name/normalize_name/good	throughput	[94051672.695op/s; 94106765.270op/s] or [-0.029%; +0.029%]	None	None	None

Baseline

Omitted due to size.

codecov-commenter · 2026-03-25T11:11:04Z

Codecov Report

❌ Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.99%. Comparing base (c664ed7) to head (8683969).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1789      +/-   ##
==========================================
- Coverage   71.01%   70.99%   -0.02%     
==========================================
  Files         411      411              
  Lines       64794    64803       +9     
==========================================
- Hits        46014    46008       -6     
- Misses      18780    18795      +15

Components	Coverage Δ
libdd-crashtracker	`65.29% <ø> (+0.06%)`	⬆️
libdd-crashtracker-ffi	`34.98% <ø> (ø)`
libdd-alloc	`98.77% <ø> (ø)`
libdd-data-pipeline	`87.61% <ø> (ø)`
libdd-data-pipeline-ffi	`73.45% <ø> (ø)`
libdd-common	`79.78% <ø> (ø)`
libdd-common-ffi	`73.87% <ø> (ø)`
libdd-telemetry	`62.48% <ø> (ø)`
libdd-telemetry-ffi	`16.75% <ø> (ø)`
libdd-dogstatsd-client	`82.64% <ø> (ø)`
datadog-ipc	`70.31% <ø> (-2.25%)`	⬇️
libdd-profiling	`81.60% <72.72%> (-0.02%)`	⬇️
libdd-profiling-ffi	`64.94% <ø> (ø)`
datadog-sidecar	`31.63% <ø> (ø)`
datdog-sidecar-ffi	`13.34% <ø> (ø)`
spawn-worker	`54.69% <ø> (ø)`
libdd-tinybytes	`93.16% <ø> (ø)`
libdd-trace-normalization	`81.71% <ø> (ø)`
libdd-trace-obfuscation	`87.37% <ø> (ø)`
libdd-trace-protobuf	`68.25% <ø> (ø)`
libdd-trace-utils	`88.95% <ø> (ø)`
datadog-tracer-flare	`86.88% <ø> (ø)`
libdd-log	`74.69% <ø> (ø)`

🚀 New features to boost your workflow:

❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

datadog-official · 2026-03-25T11:11:07Z

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage (details)
• Patch Coverage: 72.73%
• Overall Coverage: 71.00% (-0.02%)

_{This comment will be updated automatically if new data arrives.

🔗 Commit SHA: 8683969 | Docs | Datadog PR Page | Was this helpful? React with 👍/👎 or give us feedback!}

dd-octo-sts · 2026-03-25T11:25:00Z

Artifact Size Benchmark Report

aarch64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.a	101.43 MB	101.44 MB	+0% (+6.07 KB) 👌
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.so	8.70 MB	8.70 MB	0% (0 B) 👌

aarch64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.so	11.29 MB	11.29 MB	+0% (+392 B) 👌
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.a	118.21 MB	118.22 MB	+0% (+8.99 KB) 👌

libdatadog-x64-windows

Artifact	Baseline	Commit	Change
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.dll	27.26 MB	27.26 MB	+0% (+2.00 KB) 👌
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.lib	80.34 KB	80.34 KB	0% (0 B) 👌
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.pdb	186.51 MB	186.52 MB	+0% (+16.00 KB) 👌
/libdatadog-x64-windows/debug/static/datadog_profiling_ffi.lib	921.90 MB	921.92 MB	+0% (+20.80 KB) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.dll	8.99 MB	8.99 MB	+0% (+512 B) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.lib	80.34 KB	80.34 KB	0% (0 B) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.pdb	26.83 MB	26.83 MB	0% (0 B) 👌
/libdatadog-x64-windows/release/static/datadog_profiling_ffi.lib	60.99 MB	61.00 MB	+0% (+5.68 KB) 👌

libdatadog-x86-windows

Artifact	Baseline	Commit	Change
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.dll	23.07 MB	23.08 MB	+0% (+1.50 KB) 👌
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.lib	81.59 KB	81.59 KB	0% (0 B) 👌
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.pdb	190.76 MB	190.76 MB	+0% (+8.00 KB) 👌
/libdatadog-x86-windows/debug/static/datadog_profiling_ffi.lib	905.43 MB	905.45 MB	+0% (+20.70 KB) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.dll	6.86 MB	6.86 MB	+0% (+512 B) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.lib	81.59 KB	81.59 KB	0% (0 B) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.pdb	28.94 MB	28.94 MB	0% (0 B) 👌
/libdatadog-x86-windows/release/static/datadog_profiling_ffi.lib	57.39 MB	57.39 MB	+0% (+5.52 KB) 👌

x86_64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.a	88.29 MB	88.30 MB	+0% (+6.09 KB) 👌
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.so	10.28 MB	10.28 MB	0% (0 B) 👌

x86_64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.a	110.96 MB	110.97 MB	+0% (+8.87 KB) 👌
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.so	12.02 MB	12.02 MB	+0% (+272 B) 👌

ivoanjo

👍 LGTM

realFlowControl · 2026-03-25T13:44:16Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-03-25T13:44:21Z

View all feedbacks in Devflow UI.

2026-03-25 13:44:21 UTC ℹ️ Start processing command /merge

2026-03-25 13:44:26 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in main is approximately 45m (p90).

2026-03-25 14:25:59 UTC ℹ️ MergeQueue: This merge request was merged

realFlowControl and others added 2 commits March 25, 2026 11:47

Add benchmark for compressed profile serialization

0f5bcaf

Co-Authored-By: GPT 5.4 <codex@openai.com>

Add BufWriter to profile compressor

8683969

Co-Authored-By: GPT 5.4 <codex@openai.com>

realFlowControl changed the title ~~Florian/bufwriter compressor~~ feat(profiling)!: Add BufWriter for batching calls to ZSTD_compressStream in profile serialization Mar 25, 2026

realFlowControl changed the title ~~feat(profiling)!: Add BufWriter for batching calls to ZSTD_compressStream in profile serialization~~ feat(profiling)!: Add BufWriter for batching calls to ZSTD_compressStream in compressor Mar 25, 2026

realFlowControl marked this pull request as ready for review March 25, 2026 11:11

realFlowControl requested a review from a team as a code owner March 25, 2026 11:11

ivoanjo approved these changes Mar 25, 2026

View reviewed changes

gh-worker-dd-devflow-36fce6 bot added mergequeue-status: queued mergequeue-status: in_progress and removed mergequeue-status: queued labels Mar 25, 2026

gh-worker-dd-mergequeue-cf854d bot merged commit 38d0957 into main Mar 25, 2026
61 of 65 checks passed

gh-worker-dd-devflow-36fce6 bot removed the mergequeue-status: in_progress label Mar 25, 2026

gh-worker-dd-mergequeue-cf854d bot deleted the florian/bufwriter-compressor branch March 25, 2026 14:25

gh-worker-dd-devflow-36fce6 bot added the mergequeue-status: done label Mar 25, 2026

Conversation

realFlowControl commented Mar 25, 2026

What does this PR do?

Motivation

Additional Notes

How to test the change?

Uh oh!

github-actions bot commented Mar 25, 2026

📚 Documentation Check Results

📦 libdd-profiling - 647 warning(s)

Uh oh!

github-actions bot commented Mar 25, 2026

Clippy Allow Annotation Report

Summary by Rule

Annotation Counts by File

Annotation Stats by Crate

About This Report

Uh oh!

github-actions bot commented Mar 25, 2026

🔒 Cargo Deny Results

📦 libdd-profiling - 3 error(s)

Uh oh!

ivoanjo commented Mar 25, 2026

Uh oh!

pr-commenter bot commented Mar 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Benchmarks

Comparison

Explanation

More details about the CI and significant changes

scenario:normalization/normalize_name/normalize_name/Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Long-.Too-Lo...

scenario:receiver_entry_point/report/2598

scenario:two way interface

Candidate

Group 1

Group 2

Group 3

Group 4

Group 5

Group 6

Group 7

Group 8

Group 9

Group 10

Group 11

Group 12

Group 13

Group 14

Group 15

Group 16

Group 17

Group 18

Group 19

Group 20

Group 21

Baseline

Uh oh!

codecov-commenter commented Mar 25, 2026

Codecov Report

Uh oh!

datadog-official bot commented Mar 25, 2026

Uh oh!

dd-octo-sts bot commented Mar 25, 2026

Artifact Size Benchmark Report

Uh oh!

ivoanjo left a comment

Choose a reason for hiding this comment

Uh oh!

realFlowControl commented Mar 25, 2026

Uh oh!

gh-worker-devflow-routing-ef8351 bot commented Mar 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

📦 `libdd-profiling` - 647 warning(s)

📦 `libdd-profiling` - 3 error(s)

pr-commenter bot commented Mar 25, 2026 •

edited

Loading

gh-worker-devflow-routing-ef8351 bot commented Mar 25, 2026 •

edited

Loading