tree 2435ec369a2fcda2535c492c298e5a9da73540de
parent d2afb05f6a5cb4db303087004114b3914d3b7761
author Jungshik Shin <jshin@chromium.org> 1541658140 -0800
committer Jungshik Shin <jshin@chromium.org> 1541658185 +0000

Cherry-pick: UnicodeSet performance enhancement

The start-up performance regression reported for Android
WebView and Windows Chrome is traced to UnicodeSet creation
for Unicode character properties.

This upstream PR speeds up UnicodeSet creation.

Upstream bug:
  https://unicode-org.atlassian.net/browse/ICU-20250

Upstream PR: https://github.com/unicode-org/icu/pull/265

TBR=ftang@chromium.org

Bug: 899983,901532
Test: Android webview start-up perf.
Change-Id: Iffb6eac4ddde2cabd2f55fe718a9b4e3f39b4e05
Reviewed-on: https://chromium-review.googlesource.com/c/1325398
Reviewed-by: Jungshik Shin <jshin@chromium.org>