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dict.c clustered slot prealloc.

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antirez 2016-09-06 16:55:48 +02:00
parent 976a7d231f
commit 96224f750f
1 changed files with 10 additions and 4 deletions
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14
src/dict.c
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@ -60,7 +60,7 @@
* prevented: a hash table is still allowed to grow if the ratio between * prevented: a hash table is still allowed to grow if the ratio between
* the number of elements and the buckets > dict_force_resize_ratio. */ * the number of elements and the buckets > dict_force_resize_ratio. */
static int dict_can_resize = 1; static int dict_can_resize = 1;
static unsigned int dict_resize_ratio = 20; static unsigned int dict_resize_ratio = 10;
static unsigned int dict_force_resize_ratio = 60; static unsigned int dict_force_resize_ratio = 60;
/* -------------------------- private prototypes ---------------------------- */ /* -------------------------- private prototypes ---------------------------- */
@ -153,14 +153,20 @@ dictEntry *dictPushEntry(dictEntryVector **table, unsigned int idx, const void *
dictEntry *he; dictEntry *he;
if (dv == NULL) { if (dv == NULL) {
dv = table[idx] = zmalloc(sizeof(dictEntryVector)+sizeof(dictEntry)); int initlen = dict_resize_ratio/4;
if (initlen == 0) initlen = 1;
dv = table[idx] =
zcalloc(sizeof(dictEntryVector)+sizeof(dictEntry)*initlen);
dv->used = 1; dv->used = 1;
dv->free = 0; dv->free = initlen-1;
he = dv->entry; he = dv->entry;
} else if (dv->free == 0) { } else if (dv->free == 0) {
dv = table[idx] = zrealloc(table[idx],sizeof(dictEntryVector)+sizeof(dictEntry)*(dv->used+1)); int newlen = (dv->used+dv->free)*2;
dv = table[idx] = zrealloc(table[idx],sizeof(dictEntryVector)+sizeof(dictEntry)*newlen);
he = dv->entry+dv->used; he = dv->entry+dv->used;
dv->used++; dv->used++;
dv->free = newlen - dv->used;
memset(dv->entry+dv->used,0,sizeof(dictEntry)*dv->free);
} else { } else {
uint32_t entries = dv->used+dv->free; uint32_t entries = dv->used+dv->free;
uint32_t j; uint32_t j;