Move Prefetch Before Insertion; Speed Up ~6%

2020-09-10 18:51:52 -04:00
parent eede46a47e
commit a494111385
1 changed files with 3 additions and 3 deletions
@@ -531,14 +531,14 @@ size_t ZSTD_HcFindBestMatch_generic (

    U32 matchIndex;

-    /* HC4 match finder */
-    matchIndex = ZSTD_insertAndFindFirstIndex_internal(ms, cParams, ip, mls);
-
    if (dictMode == ZSTD_dedicatedDictSearch) {
        const U32* entry = &dms->hashTable[ddsIdx];
        PREFETCH_L1(entry);
    }

+    /* HC4 match finder */
+    matchIndex = ZSTD_insertAndFindFirstIndex_internal(ms, cParams, ip, mls);
+
    for ( ; (matchIndex>lowLimit) & (nbAttempts>0) ; nbAttempts--) {
        size_t currentMl=0;
        if ((dictMode != ZSTD_extDict) || matchIndex >= dictLimit) {