From b4b83cd8d2a7a730ad233443539e72404a2484af Mon Sep 17 00:00:00 2001
From: Lua Team <team@lua.org>
Date: Wed, 18 Apr 2007 00:00:00 -0400
Subject: [PATCH] Very small numbers all collide in the hash function. 
 (Performance problems only)

Reported on 18 Apr 2007
---
 src/ltable.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ltable.c b/src/ltable.c
index bc91cac..d4217b2 100644
--- a/src/ltable.c
+++ b/src/ltable.c
@@ -84,8 +84,8 @@ static const Node dummynode_ = {
 static Node *hashnum (const Table *t, lua_Number n) {
   unsigned int a[numints];
   int i;
-  n += 1;  /* normalize number (avoid -0) */
-  lua_assert(sizeof(a) <= sizeof(n));
+  if (luai_numeq(n, 0))  /* avoid problems with -0 */
+    return gnode(t, 0);
   memcpy(a, &n, sizeof(a));
   for (i = 1; i < numints; i++) a[0] += a[i];
   return hashmod(t, a[0]);
-- 
2.11.4.GIT