commit 5378331f2df1ba5bc3a4dc38f7b3ae53c3f2cbef
parent 894a2646719006489800ea68b0515ab956f8aa62
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 10 Aug 1998 18:36:11 -0300
hash tables may shrink if use rate is too small.
Diffstat:
2 files changed, 6 insertions(+), 14 deletions(-)
diff --git a/lstring.c b/lstring.c
@@ -1,5 +1,5 @@
/*
-** $Id: lstring.c,v 1.13 1998/06/19 16:14:09 roberto Exp roberto $
+** $Id: lstring.c,v 1.14 1998/07/27 17:06:17 roberto Exp roberto $
** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h
*/
@@ -45,8 +45,7 @@ static unsigned long hash_s (char *s, long l)
return h;
}
-static int newsize (stringtable *tb)
-{
+static int newsize (stringtable *tb) {
int size = tb->size;
int realuse = 0;
int i;
@@ -54,10 +53,7 @@ static int newsize (stringtable *tb)
for (i=0; i<size; i++)
if (tb->hash[i] != NULL && tb->hash[i] != &EMPTY)
realuse++;
- if (2*(realuse+1) <= size) /* +1 is the new element */
- return size; /* don't need to grow, just rehash to clear EMPTYs */
- else
- return luaO_redimension(size);
+ return luaO_redimension((realuse+1)*2); /* +1 is the new element */
}
diff --git a/ltable.c b/ltable.c
@@ -1,5 +1,5 @@
/*
-** $Id: ltable.c,v 1.12 1998/01/28 16:50:33 roberto Exp roberto $
+** $Id: ltable.c,v 1.13 1998/07/12 16:15:19 roberto Exp roberto $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
@@ -121,8 +121,7 @@ Hash *luaH_new (int nhash)
}
-static int newsize (Hash *t)
-{
+static int newsize (Hash *t) {
Node *v = t->node;
int size = nhash(t);
int realuse = 0;
@@ -131,10 +130,7 @@ static int newsize (Hash *t)
if (ttype(ref(v+i)) != LUA_T_NIL && ttype(val(v+i)) != LUA_T_NIL)
realuse++;
}
- if (2*(realuse+1) <= size) /* +1 is the new element */
- return size; /* don't need to grow, just rehash */
- else
- return luaO_redimension(size);
+ return luaO_redimension((realuse+1)*2); /* +1 is the new element */
}
static void rehash (Hash *t)