dmajda/pegjs — pull request #208 by palant (2013-09-09 13:16:44+00:00)
Title: Improve report-left-recursion performance, do not create a new array copy at each step

`report-left-recursion.js` compile step can require excessive amounts of time for some grammars. Almost 50% of that time is spent copying arrays around, fixed by this change.