facebook/zstd
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Move Prefetch Before Insertion; Speed Up ~6%

Browse Source
This commit is contained in:
W. Felix Handte 2020-08-13 14:54:10 -04:00
parent eede46a47e
commit a494111385
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/compress/zstd_lazy.c
View File

@ -531,14 +531,14 @@ size_t ZSTD_HcFindBestMatch_generic (
U32 matchIndex; U32 matchIndex;
/* HC4 match finder */
matchIndex = ZSTD_insertAndFindFirstIndex_internal(ms, cParams, ip, mls);
if (dictMode == ZSTD_dedicatedDictSearch) { if (dictMode == ZSTD_dedicatedDictSearch) {
const U32* entry = &dms->hashTable[ddsIdx]; const U32* entry = &dms->hashTable[ddsIdx];
PREFETCH_L1(entry); PREFETCH_L1(entry);
} }
/* HC4 match finder */
matchIndex = ZSTD_insertAndFindFirstIndex_internal(ms, cParams, ip, mls);
for ( ; (matchIndex>lowLimit) & (nbAttempts>0) ; nbAttempts--) { for ( ; (matchIndex>lowLimit) & (nbAttempts>0) ; nbAttempts--) {
size_t currentMl=0; size_t currentMl=0;
if ((dictMode != ZSTD_extDict) || matchIndex >= dictLimit) { if ((dictMode != ZSTD_extDict) || matchIndex >= dictLimit) {