This comment is worrying:
"Can you try D version without std.random, and use srand and rand
from std.c.stdlib? I think it should be almost same speed as C
version ;-)"
"Wow! Just tried that, and this brings the running time of the
DMD-compiled version to 0.770s from 1.290, the GDC-compiled
version from 1.060 to 0.680s, and the LDC version to 0.580s from
0.710s. Meaning the LDC version is on par with the Clang-compiled
C version and just slightly beats the GCC-compiled C one! There
really should be a warning note in the std.random library
documentation that for performance-critical code the C stdlib
random generator is a better choice."
Is this just because RNGs are value types? It's literally causing
bad press for D, so this needs to be high on the priority list.
