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added code comments

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Yann Collet 2017-11-08 17:56:20 -08:00
parent 63f6039fb3
commit dc3ed5b6a7
1 changed files with 6 additions and 1 deletions
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7
lib/lz4opt.h
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@ -184,8 +184,13 @@ static int LZ4HC_compress_optimal (
DEBUGLOG(7, "rPos:%u[%u] vs [%u]%u", DEBUGLOG(7, "rPos:%u[%u] vs [%u]%u",
cur, opt[cur].price, opt[cur+1].price, cur+1); cur, opt[cur].price, opt[cur+1].price, cur+1);
if (fullUpdate) { if (fullUpdate) {
if ((opt[cur+1].price <= opt[cur].price) && (opt[cur+MINMATCH].price < opt[cur].price + 3/*min seq price*/)) continue; /* not useful to search here if next position has same (or lower) cost */
if ( (opt[cur+1].price <= opt[cur].price)
/* in some cases, next position has same cost, but cost rises sharply after, so a small match would still be beneficial */
&& (opt[cur+MINMATCH].price < opt[cur].price + 3/*min seq price*/) )
continue;
} else { } else {
/* not useful to search here if next position has same (or lower) cost */
if (opt[cur+1].price <= opt[cur].price) continue; if (opt[cur+1].price <= opt[cur].price) continue;
} }