JuliaLang/julia — pull request #6937 by deinst (2014-05-23 16:04:12+00:00)
Title: Faster set

This extracts the useful parts out of Dict and injects them into Set. This appears to speed things and save some memory(about 10% in the code that I have tried). I'm not sure if that speedup is worth the extra complexity.
I prefixed the method names copied from dict with an 's' (I possibly shouldn't have, and just let the dispatcher handle things.)