$ python -u tools/run_perf.py --binary-override-path   out/x64.release/d8 --filter "JSTests/Intl"   test/js-perf-test/JSTests.json
...
NewIntlDateTimeFormat-Intl(Score): 92.9

Compare to baseline in
https://chromium-review.googlesource.com/c/v8/v8/+/1455727

improve another x3.5

Bug: chromium:928098
Change-Id: Iab6b9e2d58231832c54bc626d01b25a3813537fa
Reviewed-on: https://chromium-review.googlesource.com/c/1457603Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59444}