tree 119820aaf61f574eff473433801e6c847ae7ee69
parent 75de3e8e1d4a939ef7d12875036df7360158aaaa
author Colin Cross <ccross@android.com> 1429051116 -0700
committer Colin Cross <ccross@android.com> 1429120986 -0700

Optimize ninja_writer

Prebuild a string of all spaces to avoid calling strings.Repeat for
every indented line.  Replace appendWithWrap function with a class
that handles counting bytes on a line as they are written instead of
buffering lines, and avoids extra string concatenations by providing
a function that implicitly adds a space.  Saves 10% wall time on one
workload.

Change-Id: I571d70366ee5db21c40c1c98d0fe92d640efefab