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peterwmwong ae4529f9e1 [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}
2018-04-12 16:13:44 +00:00
benchmarks Fix common misspellings 2017-08-02 09:35:28 +00:00
build_overrides [ndk] Change android ndk root for v8 2018-01-11 08:10:33 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni Suppress running find_bad_constructs when testing V8 standalone 2018-04-06 13:24:30 +00:00
include Update version to 6.8 2018-04-12 10:58:04 +00:00
infra [CQ] Use linux x64 debug bot on CQ instead of ia32 2018-04-12 10:27:47 +00:00
samples [sample] fix potential memory leak. 2018-02-21 13:06:18 +00:00
src [builtins] Add fast paths to String.p.matchAll 2018-04-12 16:13:44 +00:00
test [builtins] Fix missing ToString in RegExp.p.match 2018-04-12 14:54:54 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party Removed unused antlr4 files 2018-04-10 11:40:44 +00:00
tools auto_roll.py: use LUCI for the optional GPU tests on Windows 2018-04-12 14:29:03 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.git-blame-ignore-revs [build] Add DEPS formatting to hyper-blame 2017-10-09 14:08:45 +00:00
.gitignore Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +00:00
.gn [test] Remove obsolete test262 archive extract 2018-03-28 13:52:15 +00:00
.vpython [tools] Add pypiwin32 pacakge to VPython config 2018-03-09 20:33:36 +00:00
.ycm_extra_conf.py [ycm] Switch from gnu++11 to gnu++14 2017-11-27 07:48:21 +00:00
AUTHORS interpreter: make interpreted frames distinguishable in the native stack 2018-04-10 19:33:55 +00:00
BUILD.gn Introduce CodeReference 2018-04-12 15:50:19 +00:00
ChangeLog [tools] Merge ChangeLog from latest release 2017-12-19 12:30:56 +00:00
CODE_OF_CONDUCT.md Explicitly state that the Chromium Code of Conduct also applies to V8 2016-03-02 09:51:24 +00:00
codereview.settings Make Gerrit the default code review for V8 2017-06-30 17:37:37 +00:00
DEPS Update V8 DEPS. 2018-04-12 03:31:05 +00:00
LICENSE Add antlr4 runtime library to support Torque 2018-04-10 10:01:01 +00:00
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.v8 Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
LICENSE.valgrind Add LICENSE.v8, LICENSE.strongtalk and LICENSE.valgrind to the v8 2011-02-03 07:10:06 +00:00
OWNERS Adding a few more wasm related OWNERS. 2018-03-01 20:19:07 +00:00
PRESUBMIT.py [gyp] remove gyp files. 2018-02-08 20:04:06 +00:00
README.md [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
snapshot_toolchain.gni MIPS[64]: Generate snapshots on MIPS big-endian targets 2017-11-24 19:00:32 +00:00
WATCHLISTS Remove v8-x87-ports@ from WATCHLIST 2018-02-26 19:56:21 +00:00

README.md

V8 JavaScript Engine

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

Getting the Code

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/*

Contributing

Please follow the instructions mentioned on the V8 wiki.