| commit | e34165c5431e125c3a3c410c64a341f0e6755c83 | [log] [tgz] |
|---|---|---|
| author | Brian Quinlan <bquinlan@google.com> | Fri Mar 17 16:13:19 2023 +0000 |
| committer | Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> | Fri Mar 17 16:13:19 2023 +0000 |
| tree | f1e8eef8fe2e85bf5275bcaea15c681bb2d6099f | |
| parent | dcd65d0122a40cd1e4f010ed95174d5b5e55aba5 [diff] |
Reland "[io] Improve the performance of the IOSink returned by `openWrite` by writing eagerly and accumulating small writes." This is a reland of commit c2bdda63f58cc76379d01475bcd8e915bb93969a Original change's description: > [io] Improve the performance of the IOSink returned by `openWrite` by writing eagerly and accumulating small writes. > > Benchmarks (benchmarks/FileIOSink/dart/FileIOSink.dart): > > @before: > > FileIOSink.Add.ManySmall(RunTime): 2341597.0 us. > FileIOSink.Add.OneLarge(RunTime): 111.06925927974774 us. > FileIOSink.Add.AlternatingAddSize(RunTime): 105.65958788898234 us. > > @after > > FileIOSink.Add.ManySmall(RunTime): 5007.1125 us. > FileIOSink.Add.OneLarge(RunTime): 98.23492468475541 us. > FileIOSink.Add.AlternatingAddSize(RunTime): 91.77411527720551 us. > > So the relative performance changes are: > > FileIOSink.Add.ManySmall(RunTime): 0.00213x (MUCH faster) > FileIOSink.Add.OneLarge(RunTime): 0.884x (slight faster - noise?) > FileIOSink.Add.AlternatingAddSize(RunTime): 0.868x (slightly faster - noise?) > > https://golem.corp.goog/Revision?repository=dart&revision=102771&patch=17842 > > Change-Id: Ic73f33299a570096dd05f254982f556767559966 > Bug:https://github.com/dart-lang/sdk/issues/32874 > Tested: unit tests > CoreLibraryReviewExempt: Performance-only fix for file writes in the VM. > Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/285420 > Commit-Queue: Brian Quinlan <bquinlan@google.com> > Reviewed-by: Alexander Aprelev <aam@google.com> Bug: https://github.com/dart-lang/sdk/issues/32874 Change-Id: I758f3159e85c837d6ec4a0f3e470b519825ee142 Tested: unit tests CoreLibraryReviewExempt: Performance-only fix for file writes in the VM. Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/288545 Reviewed-by: Alexander Aprelev <aam@google.com> Commit-Queue: Brian Quinlan <bquinlan@google.com> Reviewed-by: William Hesse <whesse@google.com>
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