Optimizations and performance

[Bauss via Digitalmars-d]

D definitely needs some optimizations, I mean look at its 
benchmarks compared to other languages: 
https://github.com/kostya/benchmarks

I believe the first step towards better performance would be 
identifying the specific areas that are slow.

I definitely believe D could do much better than what's shown.

Let's find D's performance weaknesses and crack them down.