mozilla/rust — pull request #10987 by spaolacci (2013-12-15 18:39:41+00:00)
Title: std::io: Faster BufferedReader:read_byte.

Replace Reader's default implementation to take benefit of that
particular fixed size / very small reads situation.

Brings a 2x perf improvement on a lightweight wc-like test app (300
iterations, `/usr/share/dict/web2', MBA laptop).