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[opt] Don't recompute initial literals price

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This commit is contained in:
Nick Terrell 2020-03-04 16:12:16 -08:00
parent 8974906129
commit 5f49578be7
1 changed files with 1 additions and 14 deletions
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15
lib/compress/zstd_opt.c
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@ -270,19 +270,6 @@ static int ZSTD_litLengthContribution(U32 const litLength, const optState_t* con
}
}
/* ZSTD_literalsContribution() :
* creates a fake cost for the literals part of a sequence
* which can be compared to the ending cost of a match
* should a new match start at this position */
static int ZSTD_literalsContribution(const BYTE* const literals, U32 const litLength,
const optState_t* const optPtr,
int optLevel)
{
int const contribution = (int)ZSTD_rawLiteralsCost(literals, litLength, optPtr, optLevel)
+ ZSTD_litLengthContribution(litLength, optPtr, optLevel);
return contribution;
}
/* ZSTD_getMatchPrice() :
* Provides the cost of the match part (offset + matchLength) of a sequence
* Must be combined with ZSTD_fullLiteralsCost() to get the full cost of a sequence.
@ -894,7 +881,7 @@ ZSTD_compressBlock_opt_generic(ZSTD_matchState_t* ms,
{ U32 i ; for (i=0; i<ZSTD_REP_NUM; i++) opt[0].rep[i] = rep[i]; }
opt[0].mlen = 0; /* means is_a_literal */
opt[0].litlen = litlen;
opt[0].price = ZSTD_literalsContribution(anchor, litlen, optStatePtr, optLevel);
opt[0].price = ZSTD_litLengthPrice(litlen, optStatePtr, optLevel);
/* large match -> immediate encoding */
{ U32 const maxML = matches[nbMatches-1].len;