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gsathya df4f8a2b9e Promises: Make PromiseSet operation monomorphic 
The PromiseSet operation is called with two types of promises
1) A newly created promise object with no properties
2) Promise object with callbacks and other properties

PromiseSet is called with the first type of promise (with no
properties) from multiple call sites. PromiseSet is called with the
second type of promise object only from FulfillPromise. Furthermore,
this call only sets the value and status of the promise, the rest of
the values are reset to UNDEFINED (which isn't necessary).

This patch inlines the calls to set the value and status of the
promise in FulfillPromise, instead of calling out to PromiseSet.

This patch also reduces the number of symbol lookups, as we only set
the value and status of the promise, and don't change the callback or
deferred symbols.

This patch results in a performance improvement of 2.8% over 5 runs in
the bluebird benchmark.

BUG=v8:5046

Review-Url: https://codereview.chromium.org/2025073002
Cr-Commit-Position: refs/heads/master@{#36688}
2016-06-02 16:43:45 +00:00
benchmarks Revert "Refactoring: Make gtest testsuite the default." 2014-09-02 09:17:26 +00:00
build_overrides [gn] Add unittests 2016-06-01 12:29:40 +00:00
docs [Docs] Removed unused docs because they are moved to GitHub 2015-11-19 10:23:30 +00:00
gni [gn] Fix setting v8_target_arch default 2016-05-24 10:44:51 +00:00
gypfiles AIX: Define __STDC_FORMAT_MACROS in gypi file 2016-06-02 14:04:40 +00:00
include Revert of Reland "[heap] Fine-grained JSArrayBuffer tracking" (patchset #7 id:180001 of https://codereview.chromium.org/2026633003/ ) 2016-06-02 06:47:34 +00:00
infra [CQ] Raise blink trybot percentage to 100 2016-04-29 09:05:06 +00:00
samples Rename shell to v8_shell 2016-05-10 12:32:25 +00:00
src Promises: Make PromiseSet operation monomorphic 2016-06-02 16:43:45 +00:00
test [stubs] Extend HasProperty stub with dictionary-mode, string wrapper and double-elements objects support. 2016-06-02 15:02:58 +00:00
testing Converted V8 CQ config to proto-format 2015-05-28 15:02:53 +00:00
third_party/binutils [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
tools [release] Auto-detect clusterfuzz issues for ignition with arm 2016-06-01 13:31:30 +00:00
.clang-format [formatting] Remove the formatting requirement for 2 empty lines between declarations. 2016-01-25 09:50:17 +00:00
.gitignore Add v8.ignition_dispatches_table.json to .gitignore 2016-05-03 18:12:11 +00:00
.gn Add posix/BUILD.gn to exec_script_whitelist 2016-05-18 15:02:12 +00:00
.ycm_extra_conf.py Use C++11 / gnu++11, not 0x 2016-03-22 15:24:43 +00:00
AUTHORS tools: Fix a syntax error in plot-timer-events 2016-05-23 10:19:47 +00:00
BUILD.gn [turbofan] Initial version of number type feedback. 2016-06-02 09:23:13 +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 Use v8-reviews@ for review mail, so v8-dev@ is free for dev discussions 2015-09-09 08:14:11 +00:00
DEPS Update V8 DEPS. 2016-06-02 07:21:43 +00:00
LICENSE Updates to the license information of third party components. 2015-06-16 12:37:50 +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
Makefile [build] Fix Makefile based (native) build. 2016-05-23 09:16:24 +00:00
Makefile.android [build] Fix d8-for-Android builds 2016-05-20 12:10:45 +00:00
Makefile.nacl [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
OWNERS [owners] adding more toplevel owners (but mainly me) 2016-03-16 15:54:42 +00:00
PRESUBMIT.py Remove LOG line checking from presubmit 2016-05-10 17:21:56 +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 Try to reland v8_snapshot GN build changes, take #3 2016-05-20 07:00:09 +00:00
WATCHLISTS [GN] Watchlist upadate to track gyp changes. 2016-05-17 08:14:26 +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.