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Merge pull request #5315 from soloestoy/optimize-parsing-large-bulk

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networking: optimize parsing large bulk greater than 32k
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Salvatore Sanfilippo 2018-09-04 12:49:50 +02:00 committed by GitHub
commit d60c17cbb3
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1 changed files with 13 additions and 10 deletions
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src/networking.c
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@ -1294,19 +1294,22 @@ int processMultibulkBuffer(client *c) {
c->qb_pos = newline-c->querybuf+2;
if (ll >= PROTO_MBULK_BIG_ARG) {
size_t qblen;
/* If we are going to read a large object from network
* try to make it likely that it will start at c->querybuf
* boundary so that we can optimize object creation
* avoiding a large copy of data. */
sdsrange(c->querybuf,c->qb_pos,-1);
c->qb_pos = 0;
qblen = sdslen(c->querybuf);
/* Hint the sds library about the amount of bytes this string is
* going to contain. */
if (qblen < (size_t)ll+2)
c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2-qblen);
* avoiding a large copy of data.
*
* But only when the data we have not parsed is less than
* or equal to ll+2. If the data length is greater than
* ll+2, trimming querybuf is just a waste of time, because
* at this time the querybuf contains not only our bulk. */
if (sdslen(c->querybuf)-c->qb_pos <= (size_t)ll+2) {
sdsrange(c->querybuf,c->qb_pos,-1);
c->qb_pos = 0;
/* Hint the sds library about the amount of bytes this string is
* going to contain. */
c->querybuf = sdsMakeRoomFor(c->querybuf,ll+2);
}
}
c->bulklen = ll;
}