> Op 2019-11-09 om 02:24 schreef Marģers . via fpc-devel: > > > > 3) it changes code location (code cross page boundaries). For my particular > > cpu there are 64 byte code page. If loop can fit in it, speed is twice as > > it overlaps even one byte over page boundary. Jumping forward is ok (as > > expected code flow is always forward). And there is lager page few kb - > > calling outside - small penalty.
> Most processors have a fairly large uop cache (up to 2048 for the newest > generations iirc), so this would only be for the first iteration? Do you > have a reference (agner fog page or so) or more explanation for this > that describes this?) I have to revoke my statement. Don't have evidence to back up. Code, that lead me to thous conclusions, has been discarded. I have read most whats published in agner's fog page. There nothing to pinpoint as reference. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
