4b139f76ec
Instead of caching only the default formatter, cache the last used formatter if possible. This is better because it's a common use case to create a formatter in a different language and reuse it a lot, rather than create several formatters in various languages. Running the following benchmark: ``` let i = 0; function toLocaleString() { i++; return i.toLocaleString(); } i = 0; function toLocaleStringWithLocale() { i++; return i.toLocaleString('en-US'); } const functions = [toLocaleString, toLocaleStringWithLocale]; for (const f of functions) { let start = performance.now(); for (let i = 0; i < 10e5; i++) { f(); } let end = performance.now(); print(`${f.name}: ${end - start}`); } ``` sees the following improvements: With this patch: toLocaleString: 384.292 toLocaleStringWithLocale: 450.48900000000003 Without this patch: toLocaleString: 341.952 toLocaleStringWithLocale: 23439.694 This a little over 50x improvement. Bug: chromium:926075 Change-Id: I0e316e959c90243e175df985854832a7abddbf54 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2536461 Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#71188} |
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build_overrides | ||
custom_deps | ||
docs | ||
gni | ||
include | ||
infra | ||
samples | ||
src | ||
test | ||
testing | ||
third_party | ||
tools | ||
.clang-format | ||
.clang-tidy | ||
.editorconfig | ||
.flake8 | ||
.git-blame-ignore-revs | ||
.gitattributes | ||
.gitignore | ||
.gn | ||
.vpython | ||
.ycm_extra_conf.py | ||
AUTHORS | ||
BUILD.gn | ||
CODE_OF_CONDUCT.md | ||
codereview.settings | ||
COMMON_OWNERS | ||
DEPS | ||
DIR_METADATA | ||
ENG_REVIEW_OWNERS | ||
INFRA_OWNERS | ||
INTL_OWNERS | ||
LICENSE | ||
LICENSE.fdlibm | ||
LICENSE.strongtalk | ||
LICENSE.v8 | ||
MIPS_OWNERS | ||
OWNERS | ||
PPC_OWNERS | ||
PRESUBMIT.py | ||
README.md | ||
S390_OWNERS | ||
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://v8.dev/docs
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 at v8.dev/docs/contribute.