On Thursday, 28 May 2015 at 21:27:42 UTC, Adam D. Ruppe wrote:
16 bytes is 64 bit - the same size as a reference. So copying
it is overall a bit less work - sending a 64 bit struct is as
small as a 64 bit reference and you don't go through the
pointer.
So up to them, it is a bit faster.
Add another byte and now the copy is too big to fit in a
register, so it needs to spill over into somewhere else which
means a bunch more work for the cpu.
But even in release mode (and with optimizations turned on) it is
> 3 times slower. Can I somehow enforce references, like in C++?
I tried already in ref, const ref and immutable ref, nothing
works.
