[crb002]

LLVM IR could squeeze out some more. I should take a crack at it. Did something similar to show DuPont why Criterion rocked.

[kzrdude]

The hash table is implemented in safe Rust (By using std's Vec). It has some inefficiencies that could maybe have been polished off using `unsafe`.

[Manishearth]

I had a quick look at it a while back, there aren't many (any?) inefficiencies there like that.

[0xFFC]

Citation ? To be honest I always heard LLVM is slower than GCC in most scenarios.

[crb002]

Yeah. This is largely IO bound. Operating system read calls from STDIN dominate the runtime.