Fix off-by-one error in ASM Encoder#8637
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Execution-Time Benchmarks Report ⏱️Execution-time results for samples comparing This PR (8637) and master. ✅ No regressions detected - check the details below Full Metrics ComparisonFakeDbCommand
HttpMessageHandler
Comparison explanationExecution-time benchmarks measure the whole time it takes to execute a program, and are intended to measure the one-off costs. Cases where the execution time results for the PR are worse than latest master results are highlighted in **red**. The following thresholds were used for comparing the execution times:
Note that these results are based on a single point-in-time result for each branch. For full results, see the dashboard. Graphs show the p99 interval based on the mean and StdDev of the test run, as well as the mean value of the run (shown as a diamond below the graph). Duration chartsFakeDbCommand (.NET Framework 4.8)gantt
title Execution time (ms) FakeDbCommand (.NET Framework 4.8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (72ms) : 70, 75
master - mean (73ms) : 70, 75
section Bailout
This PR (8637) - mean (79ms) : 74, 84
master - mean (79ms) : 75, 83
section CallTarget+Inlining+NGEN
This PR (8637) - mean (1,109ms) : 1054, 1165
master - mean (1,104ms) : 1056, 1153
FakeDbCommand (.NET Core 3.1)gantt
title Execution time (ms) FakeDbCommand (.NET Core 3.1)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (117ms) : 110, 124
master - mean (113ms) : 109, 117
section Bailout
This PR (8637) - mean (118ms) : 113, 123
master - mean (118ms) : 113, 124
section CallTarget+Inlining+NGEN
This PR (8637) - mean (788ms) : 755, 820
master - mean (787ms) : 759, 814
FakeDbCommand (.NET 6)gantt
title Execution time (ms) FakeDbCommand (.NET 6)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (104ms) : 98, 110
master - mean (102ms) : 98, 106
section Bailout
This PR (8637) - mean (102ms) : 99, 105
master - mean (106ms) : 100, 111
section CallTarget+Inlining+NGEN
This PR (8637) - mean (949ms) : 910, 989
master - mean (946ms) : 907, 986
FakeDbCommand (.NET 8)gantt
title Execution time (ms) FakeDbCommand (.NET 8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (100ms) : 97, 103
master - mean (99ms) : 95, 103
section Bailout
This PR (8637) - mean (104ms) : 100, 109
master - mean (103ms) : 98, 108
section CallTarget+Inlining+NGEN
This PR (8637) - mean (822ms) : 781, 864
master - mean (822ms) : 788, 856
HttpMessageHandler (.NET Framework 4.8)gantt
title Execution time (ms) HttpMessageHandler (.NET Framework 4.8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (200ms) : 194, 207
master - mean (202ms) : 194, 210
section Bailout
This PR (8637) - mean (203ms) : 197, 209
master - mean (206ms) : 198, 213
section CallTarget+Inlining+NGEN
This PR (8637) - mean (1,194ms) : 1155, 1233
master - mean (1,205ms) : 1159, 1251
HttpMessageHandler (.NET Core 3.1)gantt
title Execution time (ms) HttpMessageHandler (.NET Core 3.1)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (285ms) : 277, 294
master - mean (288ms) : 281, 295
section Bailout
This PR (8637) - mean (288ms) : 277, 298
master - mean (290ms) : 283, 296
section CallTarget+Inlining+NGEN
This PR (8637) - mean (963ms) : 939, 987
master - mean (967ms) : 941, 992
HttpMessageHandler (.NET 6)gantt
title Execution time (ms) HttpMessageHandler (.NET 6)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (279ms) : 270, 289
master - mean (281ms) : 275, 287
section Bailout
This PR (8637) - mean (279ms) : 273, 286
master - mean (280ms) : 275, 285
section CallTarget+Inlining+NGEN
This PR (8637) - mean (1,158ms) : 1117, 1199
master - mean (1,163ms) : 1117, 1208
HttpMessageHandler (.NET 8)gantt
title Execution time (ms) HttpMessageHandler (.NET 8)
dateFormat x
axisFormat %Q
todayMarker off
section Baseline
This PR (8637) - mean (279ms) : 274, 284
master - mean (281ms) : 274, 289
section Bailout
This PR (8637) - mean (280ms) : 274, 286
master - mean (282ms) : 275, 288
section CallTarget+Inlining+NGEN
This PR (8637) - mean (1,040ms) : 998, 1082
master - mean (1,041ms) : 997, 1085
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BenchmarksBenchmark execution time: 2026-05-14 16:32:36 Comparing candidate commit 838a140 in PR branch Some scenarios are present only in baseline or only in candidate runs. If you didn't create or remove some scenarios in your branch, this maybe a sign of crashed benchmarks 💥💥💥 Scenarios present only in baseline:
Found 3 performance improvements and 4 performance regressions! Performance is the same for 48 metrics, 17 unstable metrics, 86 known flaky benchmarks, 40 flaky benchmarks without significant changes.
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Summary of changes
Fix off-by-one error in the
Encoderwhen encoding anIEnumerablethat doesn't implementIListReason for change
There's an off by one error in the encoder
Implementation details
Test coverage
Added a unit test to demonstrate the error and fix it