On Thursday, 12 November 2015 at 12:23:11 UTC, Daniel Kozak wrote:
V Thu, 12 Nov 2015 12:10:30 +0000
John Colvin via Digitalmars-d <digitalmars-d@puremagic.com>
napsáno:
On Thursday, 12 November 2015 at 11:59:50 UTC, Daniel Kozak
wrote:
> [...]
What versions of these compilers? I suspect the majority
(maybe 80%-ish) of the time is spent allocating memory, so you
might be seeing GC improvements in recent DMD
DMD 2.069
LDC 2.067
GDC 2.065
No it is not cause by memory allocations.
It seems DMD can recognize that fmttable has same result every
time, so it does compute it only once.
Ok, then my second hypothesis is that dmd is inferring the pure
attribute for fmttable because it returns auto (new in 2.069
IIRC), which enable the above optimisation that you have noted.
Gdc and ldc (and dmd) can do similar things in their backend, but
perhaps not here.
Do you have older dmd versions on hand to test?
