- Eliminated the excessive prefixing in the renamer of dart2dart.

- Eliminated the excessive prefixing in the renamer of dart2dart.
- Increased a table size from 128 to 1024. Used in the parser for token compression.
  Startup is now twice as fast for app that has been through dart2dart.
  (this is a temporary fix for issue 13747)

R=kasperl@google.com

Committed: https://code.google.com/p/dart/source/detail?r=28158

[kasperl, 2013-10-02 12:10:01]

LGTM.

https://codereview.chromium.org/25713002/diff/1/sdk/lib/_internal/compiler/im...
File sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart
(right):

https://codereview.chromium.org/25713002/diff/1/sdk/lib/_internal/compiler/im...
sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart:320:
StringBuffer resultBuilder = new StringBuffer();
Probably not a big win, but you could move this allocation down below the quick
check in line 321.

https://codereview.chromium.org/25713002/diff/1/sdk/lib/_internal/compiler/im...
sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart:322:
resultBuilder.write(firstCharAlphabet[index % firstCharAlphabet.length]);
Consider using StringBuffer.writeCharCode and String.codeUnitAt instead of all
this string manipulation.

https://codereview.chromium.org/25713002/diff/1/sdk/lib/_internal/compiler/im...
sdk/lib/_internal/compiler/implementation/dart_backend/renamer.dart:355: }
while(isForbidden(result));
while(is -> while (is

[bakster, 2013-10-02 13:03:00]

Committed patchset #3 manually as r28158 (presubmit successful).