General performance tips

[albert-j via Digitalmars-d-learn]

I have translated some simulation code from Java into D (a few 
classes, mostly manipulation of double arrays in small methods). 
D version runs 10-30% slower than Java (ldc2, dub release build). 
Profiling did not show any obvious bottlenecks. I am wondering 
whether I missed something, or such performance difference can be 
expected. I read on this forum that marking methods final and 
nothrow can help, but it didn't do much in my case. Is there 
anything else I should be looking for?
In general, something like a wiki page with performance tips 
would be very useful for D newcomers like me! :)