Revert "Speed up CharacterRange::AddCaseEquivalents"

This reverts commit f23f644fb3c7ca61c57b96887d9a461d19776cdc.

Reason for revert: Breaks arm debug builder - https://ci.chromium.org/p/v8/builders/ci/V8%20Arm%20-%20debug%20builder/22390 - missing file?

Original change's description:
> Speed up CharacterRange::AddCaseEquivalents
> 
> By using the lexCss("color:") to measure the performance
> The change make the lexCss("color:")
>   x21 - x40 times faster than trunk.
>   x2.3 - x4.6 times faster than m74.
> 
> Design Doc: http://shorturl.at/adfO5
> 
> Measured by out/x64.release/d8 reg977003.js
> see reg977003.js attached to chromium:977003
> 
> Also see another cl of benchmark in
> https://chromium-review.googlesource.com/c/v8/v8/+/1679651/
> 
> 
> Bug: chromium:977003
> Change-Id: Ie8518493d2c33df1594be1b4576bda715087b421
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1674851
> Commit-Queue: Frank Tang <ftang@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62471}

TBR=adamk@chromium.org,jkummerow@chromium.org,yangguo@chromium.org,jshin@chromium.org,gsathya@chromium.org,ftang@chromium.org

Change-Id: I780fac2cf5f4bae6846f8d5c8765cabd76637545
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:977003
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1684073
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62472}
4 files changed
tree: 42779a608c60cf07416b8facdffa74edd74c1cf8
  1. benchmarks/
  2. build_overrides/
  3. custom_deps/
  4. docs/
  5. gni/
  6. include/
  7. infra/
  8. samples/
  9. src/
  10. test/
  11. testing/
  12. third_party/
  13. tools/
  14. .clang-format
  15. .clang-tidy
  16. .editorconfig
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .gn
  21. .vpython
  22. .ycm_extra_conf.py
  23. AUTHORS
  24. BUILD.gn
  25. ChangeLog
  26. CODE_OF_CONDUCT.md
  27. codereview.settings
  28. COMMON_OWNERS
  29. DEPS
  30. ENG_REVIEW_OWNERS
  31. INFRA_OWNERS
  32. INTL_OWNERS
  33. LICENSE
  34. LICENSE.fdlibm
  35. LICENSE.strongtalk
  36. LICENSE.v8
  37. LICENSE.valgrind
  38. MIPS_OWNERS
  39. OWNERS
  40. PPC_OWNERS
  41. PRESUBMIT.py
  42. README.md
  43. S390_OWNERS
  44. WATCHLISTS
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.