On 11/06/2018 1:45 AM, Mike Franklin wrote:
On Sunday, 10 June 2018 at 13:16:21 UTC, Adam D. Ruppe wrote:
arr1[] = arr2[]; // the compiler makes this memcpy, the optimzer can
further do its magic
void memcpyD()
{
dst = src.dup;
malloc (for slice not static array)
}
void memcpyD2()
{
dst[] = src[];
memcpy
}
-----
memcpyD: 1 ms, 725 μs, and 1 hnsec
memcpyD2: 587 μs and 5 hnsecs
memcpyASM: 119 μs and 5 hnsecs
Still, the ASM version is much faster.
btw, what's the difference between the two. If you can't tell, I'm
actually not a very good D programmer.
Mike
