commit 6294f2f2c7ef5a8d7f20838277e3524c6fc9a5d5
author Seigo Nonaka <nona@google.com> Sat Jan 27 16:45:27 2018 -0800
committer Seigo Nonaka <nona@google.com> Wed Feb 07 06:01:55 2018 +0000
tree 40ede2981cc65cf46a9afd95ca7f0a43ab3dc196
parent f95a5259b0a585758d51dd5624e9bd3c391a19aa

Enable multi thread option of HarfBuzz

Here is a performance difference before and after this patch.

StaticLayout.create for random 500 character alphabet text with
hyphenation ON, line break strategy balanced.

median: 19,063,478 -> 19,257,779: (+1.0%)
 Before: N:100, .95CI:(19,030,929, 19,082,960), min:18,760,218, max:19,426,262
  After: N:100, .95CI:(19,250,591, 19,300,926), min:18,943,870, max:19,665,030

Bug: 69175154
Bug: 37567215
Test: bit CtsTextTestCases:*
Test: bit CtsWidgetTestCases:android.widget.cts.TextViewTest
Change-Id: I54adf7e0a31be87867e470ecc981e85fd6b122dc

Android.bp

diff --git a/Android.bp b/Android.bp
index ff6b430..fd5ab7a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -105,7 +105,7 @@
 
     export_include_dirs: ["src"],
     cflags: [
-        "-DHB_NO_MT",
+        "-DHAVE_INTEL_ATOMIC_PRIMITIVES",
         "-DHAVE_OT",
         "-DHAVE_ICU",
         "-DHAVE_ICU_BUILTIN",