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

btopt: minor speed optimization 

matchPrice is always right at beginning
dev
Yann Collet 2017-11-27 17:01:51 -08:00
parent 743b23878e
commit e9d1987fd7
1 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
lib/compress/zstd_opt.c
View File

@ -523,14 +523,11 @@ size_t ZSTD_compressBlock_opt_generic(ZSTD_CCtx* ctx,
U32 const offset = matches[matchNb].off;
U32 const end = matches[matchNb].len;
repcodes_t const repHistory = ZSTD_updateRep(rep, offset, ll0);
while (pos <= end) {
for ( ; pos <= end ; pos++) {
U32 const matchPrice = ZSTD_getPrice(optStatePtr, litlen, anchor, offset, pos, optLevel);
if (pos > last_pos || matchPrice < opt[pos].price) {
DEBUGLOG(7, "rPos:%u => set initial price : %u",
pos, matchPrice);
SET_PRICE(pos, pos, offset, litlen, matchPrice, repHistory); /* note : macro modifies last_pos */
}
pos++;
DEBUGLOG(7, "rPos:%u => set initial price : %u",
pos, matchPrice);
SET_PRICE(pos, pos, offset, litlen, matchPrice, repHistory); /* note : macro modifies last_pos */
} } }
}