| commit | ae4529f9e1e635d49364c9e62801d067dc806a95 | [log] [tgz] |
|---|---|---|
| author | peterwmwong <peter.wm.wong@gmail.com> | Thu Apr 12 15:34:33 2018 |
| committer | Commit Bot <commit-bot@chromium.org> | Thu Apr 12 16:13:44 2018 |
| tree | 4fde573388b4dde4e99f6c6ea4f5d94faa522128 | |
| parent | 4d7ad46db45d682011d135ad1233045117dec141 [diff] |
[builtins] Add fast paths to String.p.matchAll Add fast paths when RegExp and RegExp result are fast wherever possible. As shown below, this CL improves the performance of calling S.p.matchAll and iterating over matches. Before: StringMatchAllBuiltinRegExpIteratorCreation-Strings(Score): 5002 StringMatchAllBuiltinStringIteratorCreation-Strings(Score): 13798 StringMatchAllBuiltinString-Strings(Score): 197 StringMatchAllManualString-Strings(Score): 454 StringMatchAllBuiltinRegExp-Strings(Score): 193 StringMatchAllManualRegExp-Strings(Score): 453 StringMatchAllBuiltinZeroWidth-Strings(Score): 97.2 StringMatchAllBuiltinZeroWidthUnicode-Strings(Score): 95.9 After: StringMatchAllBuiltinRegExpIteratorCreation-Strings(Score): 15437 StringMatchAllBuiltinStringIteratorCreation-Strings(Score): 16708 StringMatchAllBuiltinString-Strings(Score): 392 StringMatchAllManualString-Strings(Score): 452 StringMatchAllBuiltinRegExp-Strings(Score): 394 StringMatchAllManualRegExp-Strings(Score): 484 StringMatchAllBuiltinZeroWidth-Strings(Score): 409 StringMatchAllBuiltinZeroWidthUnicode-Strings(Score): 413 Bug: v8:6890 Change-Id: I6fcc1003a471314cf412aac456d42286b2926810 Reviewed-on: https://chromium-review.googlesource.com/1005400 Commit-Queue: Peter Wong <peter.wm.wong@gmail.com> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Cr-Commit-Position: refs/heads/master@{#52581}
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
V8 can run standalone, or can be embedded into any C++ application.
V8 Project page: https://github.com/v8/v8/wiki
Checkout depot tools, and run
fetch v8
This will checkout V8 into the directory v8 and fetch all of its dependencies. To stay up to date, run
git pull origin
gclient sync
For fetching all branches, add the following into your remote configuration in .git/config:
fetch = +refs/branch-heads/*:refs/remotes/branch-heads/*
fetch = +refs/tags/*:refs/tags/*
Please follow the instructions mentioned on the V8 wiki.