Measure speed regression of a range of char in complex regexp
The measurement is using the code from chromium:977003

To measure
python -u tools/run_perf.py --binary-override-path  out/x64.release/d8 \
  test/js-perf-test/RegExp.json

Run on three setting:
a. m74 based on tag 7.4.301
b. trunk (m77)
c. apply cl 1674851 on trunk

ComplexCaseInsensitiveTest-RegExp
Score is better if higher
		Score	imp %	comp to m74
m74		22910
		23430
		23360
Trunk (m77)	15190	66.30%
		15710	67.05%
		15570	66.65%
CL 1674851	24590	161.88%	107.33%
		24690	157.16%	105.38%
		24200	155.43%	103.60%

Bug: chromium:977003

Change-Id: I7756f4739c44a07949103650565d1ca902e1b7ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1679651Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62449}

This is in preparation for the removal of Unibrow.

Bug: v8:8362
Change-Id: Icb969457e71d64d765eaf0fd1d0b8b9c6b6eb388
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1490572
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60042}

Bug: v8:7779
Change-Id: I79471ecb038b710d21e938efd3f9207da30e6622

NOTRY=true

Change-Id: I79471ecb038b710d21e938efd3f9207da30e6622
Reviewed-on: https://chromium-review.googlesource.com/1071508
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53319}

Bug: v8:7779
Change-Id: Iabe5b74900885d489309fdfe25674a29e8690965
Reviewed-on: https://chromium-review.googlesource.com/1068745
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53281}

BUG=v8:5339
NOTRY=true

Review-Url: https://codereview.chromium.org/2532013003
Cr-Commit-Position: refs/heads/master@{#41317}

This adds microbenchmarks for:

* the RegExp constructor,
* flag accessors,
* and RegExp functions: exec, @@match, @@search, test, @@split, @@replace.

Each benchmark is further split to measure fast and slow paths.

BUG=v8:5339

Review-Url: https://codereview.chromium.org/2521263003
Cr-Commit-Position: refs/heads/master@{#41285}