Inherent code performance advantages of D over C?

[Adam D. Ruppe]

On Tuesday, 10 December 2013 at 21:05:53 UTC, Walter Bright wrote:
> At the least, it'll compile a lot faster!

Small C programs compile a *lot* faster than small D programs 
that use Phobos.

import std.stdio; == add half a second to your compile time.

$ time dmd hellod.d

real    0m0.780s # YIKES!
user    0m0.649s
sys     0m0.102s

$ time gcc helloc.c

real    0m0.148s # not bad
user    0m0.095s
sys     0m0.039s


yikes, even doing printf in D is slow nowadays

$ time dmd hellod.d

real    0m0.290s # good but not great
user    0m0.212s
sys     0m0.058s



Larger D programs do better, of course, at least if you compile 
all the files at once (and don't use so much CTFE that it starts 
thrashing the swap file).