mozilla/rust — pull request #7696 by glinscott (2013-07-10 18:36:45+00:00)
Title: char_range_at perf work

Moves multibyte code to it's own function to make char_range_at
easier to inline, and faster for single and multibyte chars.

Benchmarked reading example.json 100 times, 1.18s before, 1.08s
after.