1d4fe00287
For the common use case of having a single resolve or reject callback, the callbacks are stored directly. Only when an additional callback is registered, we create an array to store these callbacks. There are 3 possible states for the resolve, reject symbols when we add a new callback -- 1) UNDEFINED -- This is the zero state where there is no callback registered. When we see this state, we directly attach the callbacks to the symbol. 2) !IS_ARRAY -- There is a single callback directly attached to the symbols. We need to create a new array to store additional callbacks. 3) IS_ARRAY -- There are multiple callbacks already registered, therefore we can just push the new callback to the existing array. Also, this change creates a new symbol for storing the deferred objects. Previously the deferred objects were stored in the callback arrays, but since we no longer create arrays for the initial case, we need this new symbol. The cctest has been updated to account for this new symbol. This patch results in a 19% improvement(over 5 runs) in the bluebird benchmark. BUG=v8:5046 Review-Url: https://codereview.chromium.org/2007803002 Cr-Commit-Position: refs/heads/master@{#36536} |
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| docs | ||
| gni | ||
| gypfiles | ||
| include | ||
| infra | ||
| samples | ||
| src | ||
| test | ||
| testing | ||
| third_party/binutils | ||
| tools | ||
| .clang-format | ||
| .gitignore | ||
| .gn | ||
| .ycm_extra_conf.py | ||
| AUTHORS | ||
| BUILD.gn | ||
| ChangeLog | ||
| CODE_OF_CONDUCT.md | ||
| codereview.settings | ||
| DEPS | ||
| LICENSE | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LICENSE.valgrind | ||
| Makefile | ||
| Makefile.android | ||
| Makefile.nacl | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| README.md | ||
| snapshot_toolchain.gni | ||
| WATCHLISTS | ||
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.