commit | fd2b247b683af59a230d926407480c48c5516b36 | [log] [tgz] |
---|---|---|
author | Jens Johansen <jensj@google.com> | Wed Oct 09 11:56:20 2024 +0000 |
committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Wed Oct 09 11:56:20 2024 +0000 |
tree | 8856aa068e1d0ff67b8cf98cb47f0654ec6fc8d8 | |
parent | 595662bb34e623bb8213527ea97b88aaa7b4f9a5 [diff] |
[scanner/parser] Naturally avoid bounds check in SimpleToken.type By making the constant array have size 256 we "naturally" avoid the bounds check in SimpleToken.type. Stats for 10 runs each before/after: ``` page-faults:u: -0.1222% +/- 0.0686% (-127.40 +/- 71.50) instructions:u: -0.2589% +/- 0.0007% (-55273529.20 +/- 147748.67) ``` Stats for 100 runs each before/after: ``` msec task-clock:u: -1.6562% +/- 0.7810% (-71.89 +/- 33.90) page-faults:u: -0.1251% +/- 0.0186% (-130.44 +/- 19.36) cycles:u: -1.6881% +/- 0.8129% (-302264895.65 +/- 145560853.90) instructions:u: -0.2593% +/- 0.0002% (-55345822.71 +/- 36070.85) branch-misses:u: -5.9592% +/- 2.5980% (-4206550.69 +/- 1833947.73) seconds time elapsed: -1.6470% +/- 0.7804% (-0.07 +/- 0.03) seconds user: -1.6494% +/- 0.8506% (-0.07 +/- 0.04) ``` To my surprise this also reduced the size of the aot compiled CFE by ~20 kb. Change-Id: I149eda23a0b88f06953156021389bd85728e97ac Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/387920 Commit-Queue: Jens Johansen <jensj@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
Dart is:
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