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| author | Seigo Nonaka <nona@google.com> | 2017-12-02 19:28:05 -0800 |
|---|---|---|
| committer | Seigo Nonaka <nona@google.com> | 2017-12-11 18:55:12 -0800 |
| commit | fbe63bddd6ea751cb1b82f6dfb5e896f4b7a7ef4 (patch) | |
| tree | 346c3fe1de1ee2fccf8d48c66cc666f34f435b60 /tools/aapt2/java/JavaClassGenerator.cpp | |
| parent | 0d13717248cf34b4dfee9cd757c33ed7c57338d6 (diff) | |
Introduce PremeasuredText
By measuring the character widths beforehand, we can save at least 40%
of the StaticLayout construction time which typically happens on UI
thread.
Also verified this doesn't cause performance regression for not
premeasured text.
Raw performance score (Not premeasured -> premeasured, median, N=100)
No Style, Greedy, Hyphenation OFF: 7,812,975 -> 503,245 (-93.6%)
No Style, Balanced, Hyphenation OFF: 7,843,254 -> 396,892 (-95.0%)
No Style, Greedy, Hyphenation ON : 19,134,214 -> 11,658,928 (-39.1%)
No Style, Balanced, Hyphenation ON : 19,348,062 -> 11,634,942 (-39.9%)
Styled, Greedy, Hyphenation OFF: 14,353,673 -> 572,840 (-96.0%)
Raw performance score (w/o patch -> w/ patch, median, N=100):
No Style, Greedy, Hyphenation OFF: 7,732,894 -> 7,812,975 (+1.04%)
No Style, Balanced, Hyphenation OFF: 7,884,510 -> 7,843,254 (-0.52%)
No Style, Greedy, Hyphenation ON : 18,986,958 -> 19,134,214 (+0.78%)
No Style, Balanced, Hyphenation ON : 19,232,791 -> 19,348,062 (+0.60%)
Styled, Greedy, Hyphenation OFF: 14,319,690 -> 14,353,673 (+0.24%)
Bug: 67504091
Test: bit CtsTextTestCases:*
Test: bit CtsGraphicsTestCases:*
Test: bit CtsWidgetTestCases:*
Test: FrameworksCoreTests:android.text.MeasuredTextTest
Change-Id: I0b46f04b42cc012606a9c722eca0d51147a0dcc7
Diffstat (limited to 'tools/aapt2/java/JavaClassGenerator.cpp')
0 files changed, 0 insertions, 0 deletions