[epolanski]

Interesting fact: lately I've been benchmarking few things around and I have found out that the same algorithms in JavaScript tend to outperform C in O0.

Why does that relate to your post? Because if you're going lower level for performance you may actually find your assumptions to not hold true unless a good compiler optimization phase is involved.

[tonytamps]

The OP made their reasons clear and performance wasn't part of it.