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remove unnecessary allocation in rdb save

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Former-commit-id: dfa76f04fd862e0cc7b4d3284b3922e3a5e5549d
This commit is contained in:
John Sully 2020-08-15 23:27:32 +00:00
parent a14b2097c3
commit 2268a2b761
1 changed files with 8 additions and 4 deletions
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6
src/rdb.cpp
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@ -349,19 +349,23 @@ writeerr:
} }
ssize_t rdbSaveLzfStringObject(rio *rdb, const unsigned char *s, size_t len) { ssize_t rdbSaveLzfStringObject(rio *rdb, const unsigned char *s, size_t len) {
char rgbuf[2048];
size_t comprlen, outlen; size_t comprlen, outlen;
void *out; void *out = rgbuf;
/* We require at least four bytes compression for this to be worth it */ /* We require at least four bytes compression for this to be worth it */
if (len <= 4) return 0; if (len <= 4) return 0;
outlen = len-4; outlen = len-4;
if (outlen >= sizeof(rgbuf))
if ((out = zmalloc(outlen+1, MALLOC_LOCAL)) == NULL) return 0; if ((out = zmalloc(outlen+1, MALLOC_LOCAL)) == NULL) return 0;
comprlen = lzf_compress(s, len, out, outlen); comprlen = lzf_compress(s, len, out, outlen);
if (comprlen == 0) { if (comprlen == 0) {
if (out != rgbuf)
zfree(out); zfree(out);
return 0; return 0;
} }
ssize_t nwritten = rdbSaveLzfBlob(rdb, out, comprlen, len); ssize_t nwritten = rdbSaveLzfBlob(rdb, out, comprlen, len);
if (out != rgbuf)
zfree(out); zfree(out);
return nwritten; return nwritten;
} }