Slightly more efficient rehash size selection

While probably still not optimal in terms of everyday usage in
pacman, this reduces the absolute size increase to "more reasonable"
levels.  For databases greater than 5000 in size, the minimum size
increase is used which is still on the order of a 10% increase.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/libalpm/pkghash.c b/lib/libalpm/pkghash.c
index 0324465f..8f7168d2 100644
--- a/lib/libalpm/pkghash.c
+++ b/lib/libalpm/pkghash.c
@@ -98,10 +98,12 @@ static pmpkghash_t *rehash(pmpkghash_t *oldhash)
 	 * require a table size increase that large. */
 	if(oldhash->buckets < 500) {
 		newsize = oldhash->buckets * 2;
-	} else if(oldhash->buckets < 3500) {
+	} else if(oldhash->buckets < 2000) {
 		newsize = oldhash->buckets * 3 / 2;
-	} else {
+	} else if(oldhash->buckets < 5000) {
 		newsize = oldhash->buckets * 4 / 3;
+	} else {
+		newsize = oldhash->buckets + 1;
 	}
 
 	newhash = _alpm_pkghash_create(newsize);