On Thursday, 6 September 2012 at 00:00:31 UTC, bearophile wrote:
Walter Bright:
I'd like it if you could add some instrumentation to see what
accounts for the time difference. I presume they both use the
same D source code.
Maybe that performance difference comes from the sum of some
metric tons of different little optimizations done by the GCC
back-end.
Bye,
bearophile
In addition to Walter's response, it is very rare for advanced
compiler optimisations to make >2x difference on any non-trivial
code. Not impossible, but it's definitely suspicious.
