perf(es/minifier): reduce usage analysis overhead

[hardfist]

Description:

Micro-optimization work for the ECMAScript minifier. Current patch reduces usage-analysis, DCE, renamer, and optimizer inline-map overhead on large modules while preserving existing behavior.

Micro-Optimization Progress

Target benchmark: swc_ecma_minifier single-file TypeScript minifier run (benches/full/typescript.js)
Measurement mode: valgrind --tool=callgrind
Primary metric: Ir
Baseline command: RUST_LOG=off valgrind --tool=callgrind --callgrind-out-file=... target/release/examples/minifier benches/full/typescript.js

Commit	Benchmark	Mode	Ir Before	Ir After	Ir Delta	Checks	Notes
ceea09e1f8	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,523,555,239	-0.62%	cargo fmt --all; cargo test -p swc_ecma_transforms_optimization; cargo test -p swc_ecma_minifier	Initial progress toward 5%.
38f4f3e7d9	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,498,673,241	-1.07%	cargo fmt --all; cargo test -p swc_ecma_utils; cargo test -p swc_ecma_transforms_optimization; cargo test -p swc_ecma_minifier; crates/swc_ecma_minifier/./scripts/exec.sh; cargo clippy --all --all-targets -- -D warnings	Further progress; target not complete yet.
fb3c8be211	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,490,035,410	-1.23%	cargo fmt --all; cargo test -p swc_ecma_minifier; crates/swc_ecma_minifier/./scripts/exec.sh; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Specializes finalizer literal-only traversal; target not complete yet.
ec08f30f6d	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,485,854,488	-1.30%	cargo test -p swc_ecma_transforms_optimization; cargo clippy -p swc_ecma_transforms_optimization --all-targets -- -D warnings	Caches DCE parent scope path state; target not complete yet.
93d0cbb514	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,485,136,348	-1.32%	cargo test -p swc_ecma_transforms_optimization; cargo clippy -p swc_ecma_transforms_optimization --all-targets -- -D warnings	Skips empty top_retain scans in DCE drop checks; target not complete yet.
1ec437a93e	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,482,169,581	-1.37%	cargo test -p swc_ecma_utils; cargo clippy -p swc_ecma_utils --all-targets -- -D warnings	Checks Math.* side-effect context before atom text; target not complete yet.
fc70244aa0	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,480,340,032	-1.40%	cargo test -p swc_ecma_utils; cargo clippy -p swc_ecma_utils --all-targets -- -D warnings	Applies the same context-first guard for pure member callees; target not complete yet.
3ffd55bf2a	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,480,276,424	-1.40%	cargo test -p swc_ecma_utils; cargo clippy -p swc_ecma_utils --all-targets -- -D warnings	Checks identifier contexts before pure number/string casts; target not complete yet.
2b9b9859e3	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,477,865,257	-1.45%	cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Skips delete handling for non-unary expressions; target not complete yet.
1558303f6c	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,463,148,238	-1.71%	cargo fmt --all; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Checks identifier context before usage-map lookup; target not complete yet.
44316f60d5	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,462,573,553	-1.72%	cargo fmt --all; cargo test -p swc_ecma_transforms_base; cargo clippy -p swc_ecma_transforms_base --all-targets -- -D warnings	Uses release extend while accumulating renamer cache updates; target not complete yet.
44b08d8e9f	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,453,904,419	-1.88%	cargo fmt --all; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Reserves top-level usage-analysis storage for large modules; target not complete yet.
d26e2a8c85	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,429,174,793	-2.32%	cargo fmt --all; cargo test -p swc_ecma_transforms_optimization; cargo clippy -p swc_ecma_transforms_optimization --all-targets -- -D warnings	Reserves DCE analyzer storage for large modules; target not complete yet.
8ba9e3b920	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,417,383,207	-2.53%	cargo fmt --all; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Reserves optimizer inline maps based on analyzed binding count; target not complete yet.
8056c14022	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,390,205,201	-3.02%	cargo fmt --all; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Stores VarUsageInfo inline in ProgramData.vars to avoid per-binding boxes; target not complete yet.
a750dc8391	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,390,134,723	-3.02%	cargo fmt --all; cargo check -p swc_ecma_minifier; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Skips recursive-usage hash lookup when no recursive ids are active; target not complete yet.
7e3d5651fc	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,388,848,817	-3.05%	cargo fmt --all; cargo check -p swc_ecma_minifier; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Compares pure-pass identifiers directly and avoids redundant member downcasts; target not complete yet.
1654ab203e	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,348,517,169	-3.77%	cargo fmt --all; cargo check -p swc_ecma_minifier; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Uses a single occupied-entry lookup when consuming inline variables; target not complete yet.
ff6efc15a6	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,348,385,188	-3.78%	cargo fmt --all; cargo check -p swc_ecma_minifier; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Retunes inline-map reserves after the occupied-entry lookup change; target not complete yet.
0d68d6321c	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,332,892,051	-4.06%	cargo fmt --all; cargo check -p swc_ecma_transforms_base; cargo test -p swc_ecma_transforms_base; cargo clippy -p swc_ecma_transforms_base --all-targets -- -D warnings; cargo check -p swc_ecma_minifier; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Uses string comparison for renamer arguments filters and reserves scope identifier storage before merging child scopes; target not complete yet.
d93b793664	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,304,610,408	-4.56%	cargo fmt --all; cargo check -p swc_ecma_minifier; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Defers initialized_vars lookups while merging usage data until the branch needs them; target not complete yet.
7e1a9d5ae2	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,302,436,151	-4.60%	cargo fmt --all; cargo test -p swc_ecma_transforms_optimization; cargo clippy -p swc_ecma_transforms_optimization --all-targets -- -D warnings; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings	Reuses computed identifiers in usage tracking and reserves accessed-property storage on first use; target not complete yet.
e2d6f95538	examples/minifier benches/full/typescript.js	Callgrind Ir	5,558,264,214	5,263,249,353	-5.31%	cargo fmt --all; cargo test -p swc_ecma_transforms_optimization; cargo test -p swc_ecma_minifier; cargo clippy -p swc_ecma_transforms_optimization --all-targets -- -D warnings; cargo clippy -p swc_ecma_minifier --all-targets -- -D warnings; cargo clippy --all --all-targets -- -D warnings	Replaces DCE graph index storage with a direct map plus reverse ids, skips no-op usage-data merges, and avoids property-atom root lookups when collection is disabled. Target reached.

Local artifacts are under optimization-artifacts/callgrind/ and are intentionally not committed.

BREAKING CHANGE:

None.

Related issue (if exists):

N/A

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Latest commit: e2d6f95

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[codspeed-hq]

Merging this PR will not alter performance

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 10 improved benchmarks
❌ 4 regressed benchmarks
✅ 205 untouched benchmarks
⏩ 31 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	es/large/minify/libraries/d3	494.5 ms	483.1 ms	+2.36%
⚡	es/large/minify/libraries/lodash	142.2 ms	138.4 ms	+2.76%
❌	es/large/minify/libraries/react	24.3 ms	24.9 ms	-2.44%
⚡	es/large/minify/libraries/typescript	4.6 s	4.5 s	+2.82%
⚡	es/minifier/libs/d3	377.5 ms	363.9 ms	+3.72%
⚡	es/minifier/libs/echarts	1.4 s	1.4 s	+2.13%
⚡	es/minifier/libs/three	598.2 ms	584 ms	+2.43%
⚡	es/minifier/libs/jquery	89.8 ms	87.6 ms	+2.5%
⚡	es/minifier/libs/typescript	3.5 s	3.4 s	+3.95%
⚡	es/minifier/libs/lodash	108.4 ms	104.4 ms	+3.79%
⚡	es/minifier/libs/vue	135.5 ms	132.5 ms	+2.25%
❌	es/minifier/libs/react	18.5 ms	19.2 ms	-3.29%
❌	stackoverflow	38.3 ms	45.1 ms	-15.1%
❌	stackoverflow	37.5 ms	43.6 ms	-14.09%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing hardfist:perf/micro-optimize-ecma-minifier (e2d6f95) with main (800bc17)²}

Footnotes

1. 31 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (331c920) during the generation of this report, so 800bc17 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩