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Camillo Bruni a42a2f4183 [tools] Add variants support for run_perf.py 
We usually run benchmarks in multiple variants: default, future, noopt
This is currently only achieved by copying the run-perf json file and
changing the flags at the top-level (or copy whole subsections).

Using "variants" we can duplicate the tests at the current level with
different values and easily create benchmarks that differ only in v8
flags.

Drive-by-fix:
- Add Node.__iter__ and log the whole config graph in debug mode
- Add GraphConfig.__str__ method for better debugging
- Rename TraceConfig to LeafTraceConfig
- Rename RunnableTraceConfig to RunnableLeafTraceConfig
- Make --filter accept a regexp to better filter out variants

Bug: v8:12821, v8:11113
Change-Id: I56a2ba2dd24da15c7757406e9961746219cd8061
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3596128
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Tamer Tas <tmrts@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80307}
2022-05-02 14:28:15 +00:00
.github [github] Close PRs created on the V8 GitHub mirror automatically 2021-01-12 08:39:59 +00:00
bazel [bazel] Include handler-include-posix on m1 macs 2022-04-28 08:49:58 +00:00
build_overrides [build] Remove obsolete gn flag 2021-01-11 15:50:59 +00:00
custom_deps Use relative paths to OWNERS files 2019-08-12 13:52:52 +00:00
docs Add OWNERS for docs/ 2019-05-15 12:06:15 +00:00
gni Add new owner to branch cut artifact 2022-04-01 10:50:51 +00:00
include cppgc: young-gen: Fix compilation and tests with cppgc_enable_young_gen 2022-05-02 13:34:04 +00:00
infra [infra] Remove V8 Linux64 - dict tracking - debug 2022-04-27 12:16:44 +00:00
samples [test] Add a unittest platform setup mixin 2022-04-06 13:07:43 +00:00
src Reland "Reland "[osr] Use the new OSR cache"" 2022-05-02 14:26:14 +00:00
test Reland "Reland "[osr] Use the new OSR cache"" 2022-05-02 14:26:14 +00:00
testing [test][cleanup] Fix -Wshadow warnings in unittests 2021-09-27 08:59:01 +00:00
third_party Convert inspector_protocol/roll.py to python3 2022-03-24 18:07:17 +00:00
tools [tools] Add variants support for run_perf.py 2022-05-02 14:28:15 +00:00
.bazelrc [bazel] Use v8_enable_handle_zapping only in debug builds. 2022-01-11 11:32:39 +00:00
.clang-format [clang-format] Don't derive pointer alignment 2017-01-17 09:28:19 +00:00
.clang-tidy [tool] Remove unfixed clang-tidy warnings to ease use. 2018-10-26 07:40:32 +00:00
.editorconfig Add .editorconfig 2017-07-28 13:39:24 +00:00
.flake8 remove swarming_client 2021-08-24 10:39:33 +00:00
.git-blame-ignore-revs [infra] Update .git-blame-ignore-revs 2020-03-03 12:59:13 +00:00
.gitattributes .gitattributes: Mark minified emscripten js files as -diff 2018-09-19 16:27:10 +00:00
.gitignore [infra] Fork test262-harness 2022-02-23 18:47:35 +00:00
.gn Revert "[build] Separate out inspector as a shared library" 2021-07-02 16:15:20 +00:00
.mailmap Restore consistency between .mailmap and AUTHORS 2021-06-24 08:58:04 +00:00
.style.yapf [tools] Add basic pointer compression to grokdump 2022-02-04 14:35:26 +00:00
.vpython Verify mac-arm64 wheels for v8/.vpython spec. 2021-09-15 21:11:50 +00:00
.vpython3 Use numpy 1.2x.supported.1 in V8 2022-03-03 15:21:21 +00:00
.ycm_extra_conf.py [ycm] Fix python script 2021-07-29 09:48:32 +00:00
AUTHORS Include count value to InvalidCountValue error message 2022-04-27 06:32:35 +00:00
BUILD.bazel Reland "Reland "[osr] Use the new OSR cache"" 2022-05-02 14:26:14 +00:00
BUILD.gn Reland "Reland "[osr] Use the new OSR cache"" 2022-05-02 14:26:14 +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
COMMON_OWNERS add tebbi@chromium.org to COMMON_OWNERS 2022-03-08 14:08:25 +00:00
DEPS Update google_benchmark 2022-05-02 05:59:03 +00:00
DIR_METADATA Add DIR_METADATA files to v8. 2020-10-20 22:12:28 +00:00
ENG_REVIEW_OWNERS Add verwaest@ to ENG_REVIEW_OWNERS. 2021-09-16 15:00:57 +00:00
INFRA_OWNERS Add team members as owners 2020-08-18 08:29:04 +00:00
INTL_OWNERS add ftang as owner 2020-04-24 19:19:36 +00:00
LICENSE [wasm] Draft version of C/C++ Wasm API 2019-04-17 16:00:26 +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
LOONG_OWNERS [LOONG64] Add LoongArch64 backend 2021-08-16 13:05:19 +00:00
MIPS_OWNERS [mips] Add LiuYu to MIPS_OWNERS 2021-09-08 01:38:52 +00:00
OWNERS Let infra owners own all dot files 2021-11-05 18:57:18 +00:00
PPC_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
PRESUBMIT.py [infra] use format strings instead of .format 2022-03-15 11:31:40 +00:00
README.md [docs] Change links from old wiki to v8.dev 2019-03-07 12:13:30 +00:00
RISCV_OWNERS Add Lu Yahan to RISC-V owners list 2021-09-13 16:35:00 +00:00
S390_OWNERS Adding myself to relevant OWNERS files. 2020-11-02 16:37:28 +00:00
WATCHLISTS Update WATCHLISTS 2022-02-24 11:37:36 +00:00
WORKSPACE [bazel] Cleanup style with Buildifier. 2022-01-11 10:00:36 +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://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.