On 05/03/2018 6:35 PM, J-S Caux wrote:
I'm considering shifting a large existing C++ codebase into D (it's a
scientific code making much use of functions like atan, log etc).
I've compared the raw speed of atan between C++ (Apple LLVM version
7.3.0 (clang-703.0.29)) and D (dmd v2.079.0, also ldc2 1.7.0) by doing
long loops of such functions.
I can't get the D to run faster than about half the speed of C++.
Are there benchmarks for such scientific functions published somewhere
Gonna need to disassemble and compare them.
atan should work out to only be a few instructions (inline assembly)
from what I've looked at in the source.
Also you should post the code you used for each.
