On Saturday, 1 October 2022 at 13:49:12 UTC, H. S. Teoh wrote:
On Sat, Oct 01, 2022 at 01:20:08PM +0000, realhet via Digitalmars-d-learn wrote:
It is very good to know. Thank You for the confirmation. Indeed it is really clever.
I wrote a parser only to parse the structural elements of Dlang using template string[] parameters to feed tokens for the specialized parser functions recursively(!). And it unrolled everything into jump tables. Insane :D
The only successful optimization I made was using PCMPESTRI instruction for skipping 16 bytes of text when there is no match found in a compile time constant 16 element character set. I expected like 10x speedup because of PCMPESTRI. But I only got 2x. I thought I was competing with poor linear searches only, but little I knew...
