Kapps:
I remember array operations (such as data[] -= other.data[])
being significantly slower than doing it yourself. I don't know
if this has been fixed.
They are not being "fixed". But for arrays as large as the ones
here, they are fast enough.
---------------------
I have tested the code (all in a single module) using the latest
dmd and ldc2 (beta versions in both cases), compiling with:
dmd -O -release -inline -noboundscheck matrix.d
ldmd2 -O -release -inline -noboundscheck matrix.d
Best timings:
LDC2:
multiplicationTest ...
Time required: 2 secs, 522 msecs
DMD:
multiplicationTest ...
Time required: 4 secs, 724 msecs
Using link-time optimization, or using AVX/AVX2 on modern CPUs
(using the compiler switcher for the AVX) could improve the LDC2
timings a little more.
Bye,
bearophile
