Pre-compute the hash table mask to avoid doing it in the critical path.

1 files changed, 1 insertions, 0 deletions

diff --git a/upb_table.c b/upb_table.c
index 03fab2f..3bbc7f7 100644
--- a/upb_table.c
+++ b/upb_table.c
@@ -30,6 +30,7 @@ void upb_table_init(struct upb_table *t, uint32_t size, uint16_t entry_size)
   t->size_lg2 = 1;
   while(size >>= 1) t->size_lg2++;
   size_t bytes = upb_table_size(t) * t->entry_size;
+  t->mask = upb_table_size(t) - 1;
   t->entries = malloc(bytes);
   memset(t->entries, 0, bytes);  /* Both tables consider 0's an empty entry. */
 }