Prefetch Input in Incompressible Sections (+0.25% Speed)

diff --git a/lib/compress/zstd_fast.c b/lib/compress/zstd_fast.c
index 411ffc118692e9ec9254b274486f0552dfa49850..f7df666811ea8b79eefa23898970bb5ec057cf67 100644 (file)
--- a/lib/compress/zstd_fast.c
+++ b/lib/compress/zstd_fast.c
@@ -337,6 +337,7 @@ _start: /* Requires: ip0 */
         /* advance to next positions */
         {
             if (ip1 >= nextStep) {
+                PREFETCH_L1(ip1 + 64);
                 step++;
                 nextStep += kStepIncr;
             }