On Friday, 21 November 2014 at 22:57:44 UTC, Kapps wrote:
On Friday, 21 November 2014 at 21:53:00 UTC, bearophile wrote:
anon:
https://www.academia.edu/3982638/A_Study_of_Successive_Over-relaxation_SOR_Method_Parallelization_Over_Modern_HPC_Languages
Thank you for the link, it's very uncommon to see papers that
use D. But where's the D/Go/Chapel source code? What's the
compiler/version used? (When you do floating point benchmarks
there's a huge difference between LDC2 and DMD).
Bye,
bearophile
The flags make it likely that DMD was used (-O -inline
-release). IIRC there were some problems with DMD that made it
not perform too well in these types of benchmarks that use
std.parallelism. Results would likely have been noticeably
better with GDC or LDC.
Whenever there is a benchmark like this the D community outlines
a number of obvious to arcane speedups. Our house needs to be in
order such that the obvious choice is at least competitive to the
speed claims made for D. DMD particularly, while not optimisation
focused, should improve its floating point speed and avoid
surprising 80 bit floating point behaviours, or at least try to
be surprising in a manner more in line with what users of other
languages are used to.
