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?


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