| commit | 5f519b6ca430e3dae6d22b8074c6bb1bed3dc05d | [log] [tgz] |
|---|---|---|
| author | Jens Johansen <jensj@google.com> | Wed Oct 08 03:26:29 2025 -0700 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Wed Oct 08 03:26:29 2025 -0700 |
| tree | 9d45e1e3ea36a1aef80f276c18401984099150e5 | |
| parent | 37f468c93638ecabe8a1bd4b488785cccf597ea7 [diff] |
[analyzer] 2%-4% decrease by less `map` (and friends) calls and bailing out sooner This change looks to reduce the runtime by ~2% and the instruction count by ~4%. "Disabling" the GC (likely showing the truer "actual change") shows a reduction in instruction count of ~3.4%. ``` $ out/ReleaseX64/dart pkg/front_end/tool/benchmarker.dart --silent --iterations=10 --gcs=1 --no-gc --snapshot=pkg/analyzer/tool/stable_analysis.aot.1 --snapshot=pkg/analyzer/tool/stable_analysis.aot.8 --arguments="--silent" --arguments="--no-lints" --arguments="/tmp/extracted_tar" Will now run 10+1 iterations with 2 snapshots. .........|.........|.. ...................... Comparing snapshot #1 (stable_analysis.aot.1) with snapshot #2 (stable_analysis.aot.8) msec task-clock:u: -2.1303% +/- 0.8204% (-207.06 +/- 79.74) (9719.74 -> 9512.68) cycles:u: -2.1809% +/- 0.8461% (-892934042.40 +/- 346394560.27) (40942506211.80 -> 40049572169.40) instructions:u: -4.0810% +/- 0.0115% (-2024801808.30 +/- 5686612.82) (49615287170.20 -> 47590485361.90) seconds time elapsed: -2.1327% +/- 0.8196% (-0.21 +/- 0.08) (9.72 -> 9.52) seconds user: -2.3213% +/- 0.9553% (-0.22 +/- 0.09) (9.42 -> 9.20) Comparing GC data: Scavenge( new space) goes from 199 to 188 MarkSweep( promotion) goes from 17 to 16 Notice combined GC time goes from 3249 ms to 3100 ms (notice only 1 run each). Will now run 10+0 iterations with 2 snapshots. Running with extra vm arguments: --new_gen_semi_initial_size=10000 --new_gen_semi_max_size=20000 .........|.........| .................... Comparing snapshot #1 (stable_analysis.aot.1) with snapshot #2 (stable_analysis.aot.8) msec task-clock:u: -8.2388% +/- 1.3622% (-1806.65 +/- 298.71) (21928.65 -> 20121.99) page-faults:u: -6.1983% +/- 0.0002% (-89681.70 +/- 2.84) (1446878.00 -> 1357196.30) cycles:u: -8.6179% +/- 1.4638% (-7306665045.40 +/- 1241063489.39) (84784479811.00 -> 77477814765.60) instructions:u: -3.4076% +/- 0.0004% (-1178094153.50 +/- 124058.08) (34572676148.30 -> 33394581994.80) seconds time elapsed: -8.2187% +/- 1.3603% (-1.80 +/- 0.30) (21.95 -> 20.15) seconds user: -8.4447% +/- 1.4268% (-1.66 +/- 0.28) (19.68 -> 18.02) seconds sys: -6.4342% +/- 2.6864% (-0.14 +/- 0.06) (2.25 -> 2.10) ``` Change-Id: I131be7fedd84b7dc9a07813c1817942c318a90c4 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/453960 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Jens Johansen <jensj@google.com>
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