On Friday, 8 November 2019 at 16:49:37 UTC, wolframw wrote:
I compiled with dmd -O -inline -release -noboundscheck
-mcpu=avx2 and ran the tests with the m array being
default-initialized in one run and void-initialized in another
run.
The results:
Default-initialized: 245 ms, 495 μs, and 2 hns
One correction: I think you mean "using" a default-initialized array is
faster (not the initialization itself).
Another observation: dmd -O makes both cases slower! Hm?
Ali
Hi,
Chapter 12.15.2 of the spec explains that void initialization of
a static array can be faster than default initialization. This
seems logical because the array entries don't need to be set to
NaN. However, when I ran some tests for my matrix implementation,
it seemed that the default-init
