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Prefetch Input in Incompressible Sections (+0.25% Speed)

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W. Felix Handte 2021-08-18 15:21:43 -04:00
parent b092dd75b7
commit 35932ab2f1
1 changed files with 1 additions and 0 deletions
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lib/compress/zstd_fast.c
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@ -337,6 +337,7 @@ _start: /* Requires: ip0 */
/* advance to next positions */ /* advance to next positions */
{ {
if (ip1 >= nextStep) { if (ip1 >= nextStep) {
PREFETCH_L1(ip1 + 64);
step++; step++;
nextStep += kStepIncr; nextStep += kStepIncr;
} }