tree e2c5f8791f194f73f7082c6ec98fd0d901f27769
parent a45a5436eef19c78a4117ec216bed456bfbe4327
author nweiz@google.com <nweiz@google.com> 1417566069 +0000
committer nweiz@google.com <nweiz@google.com> 1417566069 +0000

Improve the speed and memory efficiency of csslib parsing.

In particular, this avoids calling [FileSpan.start] and [FileSpan.end]
where possible, since they lazily instantiate objects.

R=sra@google.com

Review URL: https://codereview.chromium.org//751453004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/csslib@42080 260f80e4-7a28-3924-810f-c04153c831b5