From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sat, 14 May 2005 23:16:29 +0000 (+0000)
Subject: Further marginal speed hacking: in MemoryContextReset, don't call
X-Git-Tag: REL8_1_0BETA1~796
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c8a6b527050806d3e12d6002db16d5b93c644303;p=thirdparty%2Fpostgresql.git

Further marginal speed hacking: in MemoryContextReset, don't call
MemoryContextResetChildren unless necessary.
---

diff --git a/src/backend/utils/mmgr/mcxt.c b/src/backend/utils/mmgr/mcxt.c
index c5a2311bc5e..6d68e30f7eb 100644
--- a/src/backend/utils/mmgr/mcxt.c
+++ b/src/backend/utils/mmgr/mcxt.c
@@ -14,7 +14,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/mmgr/mcxt.c,v 1.54 2005/02/18 21:52:33 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/mmgr/mcxt.c,v 1.55 2005/05/14 23:16:29 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -123,7 +123,10 @@ MemoryContextReset(MemoryContext context)
 {
 	AssertArg(MemoryContextIsValid(context));
 
-	MemoryContextResetChildren(context);
+	/* save a function call in common case where there are no children */
+	if (context->firstchild != NULL)
+		MemoryContextResetChildren(context);
+
 	(*context->methods->reset) (context);
 }