On 05/30/2013 11:31 PM, finalpatch wrote:
> Hi Walter,
>
> Thanks for the reply. I have already tried these flags. However, DMD's
> codegen is lagging behind GCC and LLVM at the
> moment, so even with these flags, the runtime is ~10x longer than the C++
> version compiled with clang++ (2sec with DMD,
> 200ms with clang++ on a Core2 Mac Pro). I know this is comparing apples to
> oranges though, that's why I was comparing
> GDC vs G++ and LDC vs Clang++.
>
> On Friday, 31 May 2013 at 02:19:40 UTC, Walter Bright wrote:
>> For max speed using dmd, use the flags:
>>
>> -O -release -inline -noboundscheck
>>
>> The -inline is especially important.
Have you tried:
dmd -profile
it compiles in trace generation, so that when you run the program you get a
.log file which tells you the slowest
functions and other info.
Please not that the resulting code compiled with -profile is slower because it
is instrumented.
--jm
