| commit | 97742f827a207454102da154ec3befe29b624e80 | [log] [tgz] |
|---|---|---|
| author | Jens Johansen <jensj@google.com> | Tue Apr 13 15:06:36 2021 +0000 |
| committer | commit-bot@chromium.org <commit-bot@chromium.org> | Tue Apr 13 15:06:36 2021 +0000 |
| tree | 7110a1bbcf4881c7865020828081db702bcf76ed | |
| parent | c33dad37e5259bccdfa0700939a0de1bc961504b [diff] |
[CFE] Avoid AllocateContext in Scope.recordUse
Replacing putIfAbsent with containsKey (and inserting if not) gives an
improvement.
When compiling dart2js with fasta (from source), measuring only calls
to `recordUse` (which is called 1,549,231 times) (but measured
'outside' the method itself to include the `AllocateContext` cost)
I get the following:
Difference at 95.0% confidence
-37.2 +/- 18.2218
-18.5814% +/- 9.10179%
(Student's t, pooled s = 12.494)
i.e. almost 40 ms faster.
(this should be seen in a context of the entire compile taking
10+ seconds, but still).
Change-Id: I96cf521bb3cf760f14e4a407ff24638f019a8e21
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/194760
Commit-Queue: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
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