On Wednesday, 5 December 2018 at 11:43:46 UTC, evilrat wrote:
Are you sure you don't confuse lines with columns?
Here it says it is row major
https://github.com/d-gamedev-team/gfm/blob/master/math/gfm/math/matrix.d#L17
Yes, sorry I made a mistake. It's indeed row-major in gfm:math.
The only real difference is the order or operations. IIRC
however gfm tries to hide this difference and use math notation.
Another thing is memory caches - accessing row in succession
will have better chance of cached access while accessing
columns in most(if not all) cases will fetch more items only to
discard them on next value.
Though I haven't ever profiled this myself to be 100% sure.
I don't know if there is a definitive answer as to which is
preferable.
