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143dcc6c41
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Peter Marshall 143dcc6c41 [builtins] Skip iteration when constructing TypedArrays if possible. 
This CL uses the same logic as spread calls to check whether the
iteration over an array would produce different results to simply
accessing the backing store directly. Skipping the full iteration
protocol for normal arrays gives us a ~10x speedup on the
construct-typedarray benchmark.

BUG=v8:5977,v8:5699,v8:4782,chromium:698173

Change-Id: Ib878d39691e99b739afef0dd05a6a6efc5b6b5d4
Reviewed-on: https://chromium-review.googlesource.com/463367
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44304}
2017-03-31 10:51:26 +00:00
benchmarks
build_overrides Remove build_overrides/v8.gni. 2017-01-26 20:18:58 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [gn] Enable stricter build flags 2017-03-17 15:18:18 +00:00
gypfiles [build] Make inspector the default in gyp 2017-03-30 15:08:31 +00:00
include [regexp] Add support for dotAll flag 2017-03-31 09:20:13 +00:00
infra Enable inspector on noi18n trybot to improve test coverage 2017-03-24 20:27:54 +00:00
samples Reland of land "Turn libbase into a component" (patchset #1 id:1 of https://codereview.chromium.org/2396933002/ ) 2016-10-07 07:56:52 +00:00
src [builtins] Skip iteration when constructing TypedArrays if possible. 2017-03-31 10:51:26 +00:00
test [regexp] Fix numbered reference before named capture 2017-03-31 10:50:05 +00:00
testing Use GTEST_LANG_CXX11 in V8 2016-07-25 13:06:42 +00:00
third_party Adapt String::find method via StringUtil adapter. 2017-02-03 22:17:24 +00:00
tools [tools] Improve grokdump.py 2017-03-30 13:38:31 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.gitignore Alpha-sort .gitignore. 2017-03-13 06:44:25 +00:00
.gn [build] Add v8gen support for PPC/s390 architecture 2017-03-13 15:05:51 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS Migrate Number constants and undefined to C++ 2017-02-27 08:20:45 +00:00
BUILD.gn [gn] Remove the wasm_test_signatures source set. 2017-03-30 10:00:28 +00:00
ChangeLog [Release] Update ChangeLog file 2016-02-17 21:29:09 +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
DEPS Revert of Remove download_binaries.py from DEPS (patchset #2 id:20001 of https://codereview.chromium.org/2774043002/ ) 2017-03-31 07:33:57 +00:00
LICENSE
LICENSE.fdlibm Add LICENSE.fdlibm for all the fdlibm imported sources. 2016-06-09 07:17:03 +00:00
LICENSE.strongtalk
LICENSE.v8
LICENSE.valgrind
Makefile Make enabling of CSA verifier a build-time flag 2017-01-27 11:32:27 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
OWNERS Update to OWNER files. 2017-03-21 10:01:16 +00:00
PRESUBMIT.py [test] Enforce tracker prefix for all BUG entries 2017-03-14 16:16:22 +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 Use clang for snapshot_toolchain by default, except on ChromeOS. 2016-08-23 14:04:27 +00:00
WATCHLISTS Add jbroman to WATCHLISTS for src/value-serializer.*. 2017-03-28 12:51:29 +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.