Speed up parsing#135

Merged

fitzgen merged 2 commits intomozilla:masterfrom

fitzgen:speed-up-parsing

Oct 1, 2014

Commits on Sep 30, 2014

Don't use a RegExp for finding mapping separators in SourceMapConsumer.prototype._parseMappings
fitzgen
committed

Commits on Oct 1, 2014

Reuse temporary objects instead of returning a new one for each call to decode
fitzgen
committed