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Camillo Bruni a3c48cf2c9 Reland "[elements] Improve Array.prototype.splice speed" 
This reverts commit 9a7c4bfe1e.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Revert "[elements] Improve Array.prototype.splice speed"
> 
> This reverts commit dcdabdc86a.
> 
> Reason for revert: broke tsan.
> 
> Original change's description:
> > [elements] Improve Array.prototype.splice speed
> > 
> > By using memmove for SMI elements we get a roughly 3x speedup over the slower
> > iterative copying with write barriers.
> > 
> > Bug: chromium:835558
> > Change-Id: I73da07a1648a3495ff78212ffa1ed949d205a7d2
> > Reviewed-on: https://chromium-review.googlesource.com/1028236
> > Reviewed-by: Igor Sheludko <ishell@chromium.org>
> > Commit-Queue: Camillo Bruni <cbruni@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#52792}
> 
> TBR=cbruni@chromium.org,ishell@chromium.org
> 
> Change-Id: I77c46fe3d47d651de3c39df9fbf5f30c340188e2
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: chromium:835558
> Reviewed-on: https://chromium-review.googlesource.com/1028337
> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#52795}

TBR=kozyatinskiy@chromium.org,cbruni@chromium.org,ishell@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:835558
Change-Id: I57aedb3536b81c97cf4e7ab6d863aa1dc24c20b4
Reviewed-on: https://chromium-review.googlesource.com/1032743
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52857}
2018-04-27 17:04:26 +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 Revert "Roll third_party/inspector_protocol to 59ca26e" 2018-04-23 17:38:31 +00:00
include [api] deprecate old code caching APIs that require source string. 2018-04-26 14:53:22 +00:00
infra [infra] Add presubmit checks for test specifications 2018-04-27 08:39:26 +00:00
samples [sample] fix potential memory leak. 2018-02-21 13:06:18 +00:00
src Reland "[elements] Improve Array.prototype.splice speed" 2018-04-27 17:04:26 +00:00
test Revert "[builtins] Patch self-references in constants table" 2018-04-27 16:00:42 +00:00
testing Remove dummy files created for rolling googletest. 2018-03-27 05:55:56 +00:00
third_party Revert "Roll third_party/inspector_protocol to 59ca26e" 2018-04-23 17:38:31 +00:00
tools Revert "[builtins] Patch self-references in constants table" 2018-04-27 16:00:42 +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 Cleanup NewFunctionFromSharedFunctionInfo 2018-04-24 08:20:40 +00:00
BUILD.gn [wasm] Split off wasm-linkage.h 2018-04-27 13:43:49 +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. 2018-04-27 06:20:39 +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 [V8] Add back owners check 2018-04-27 07:43:39 +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.