Improved decompression speed (by @inikep)
diff --git a/lib/zstd_decompress.c b/lib/zstd_decompress.c
index 2d89a2d..17ba582 100644
--- a/lib/zstd_decompress.c
+++ b/lib/zstd_decompress.c
@@ -654,16 +654,12 @@
static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState, const U32 mls)
{
- size_t litLength;
- size_t prevOffset;
- size_t offset;
- size_t matchLength;
const BYTE* dumps = seqState->dumps;
const BYTE* const de = seqState->dumpsEnd;
+ size_t litLength, offset, matchLength;
/* Literal length */
litLength = FSE_peakSymbol(&(seqState->stateLL));
- prevOffset = litLength ? seq->offset : seqState->prevOffset;
if (litLength == MaxLL) {
U32 add = *dumps++;
if (add < 255) litLength += add;
@@ -686,7 +682,7 @@
if (offsetCode==0) nbBits = 0; /* cmove */
offset = offsetPrefix[offsetCode] + BIT_readBits(&(seqState->DStream), nbBits);
if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
- if (offsetCode==0) offset = prevOffset; /* repcode, cmove */
+ if (offsetCode==0) offset = litLength ? seq->offset : seqState->prevOffset;
if (offsetCode | !litLength) seqState->prevOffset = seq->offset; /* cmove */
FSE_decodeSymbol(&(seqState->stateOffb), &(seqState->DStream)); /* update */
}