JuliaLang/julia — pull request #9132 by rfourquet (2014-11-24 09:46:06+00:00)
Title: faster randn by separating out unlikely branch in a function

All credits to @ViralBShah (cf. #8941 and #9126).
This change probably allows better inlining.

On my machine this gets 35% faster. With the 40-50% of yesterday, this sums up to almost twice as fast :)