On Thursday, 24 January 2013 at 10:42:10 UTC, Joseph Rushton
Wakeling wrote:
On 01/24/2013 11:16 AM, Walter Bright wrote:
If you use the 64 bit model, dmd will use SIMD instructions
for float and
double, which are much faster.
I generally find that dmd-compiled programs run at about half
the speed of those built with gdc or ldc (the latter seem
pretty much equivalent these days, some programs run faster
compiled with one, some with the other). That's running off
latest GitHub source for all compilers.
That's been a fairly consistent speed difference for a long
time. And yes, I'm using 64-bit.
I had similar experience with all my numerical code. gdc and ldc
trade places but dmd is always solidly behind.
Walter, I know you like working with the current backend and you
understand it etc..., but this gives dmd a bus factor of 1 and is
slowing down code in the process.
