From 9880c336be9670721f32b9d5a7d5d7ccd68bfdfb Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Thu, 13 Jul 2023 13:31:31 +0200
Subject: [PATCH] Avoid string allocation in dom_get_dom1_attribute() for as
 long as possible

---
 ext/dom/element.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/ext/dom/element.c b/ext/dom/element.c
index 12c3a2a449c..366341ede9f 100644
--- a/ext/dom/element.c
+++ b/ext/dom/element.c
@@ -159,8 +159,7 @@ static xmlNodePtr dom_get_dom1_attribute(xmlNodePtr elem, xmlChar *name) /* {{{
 	nqname = xmlSplitQName3(name, &len);
 	if (nqname != NULL) {
 		xmlNsPtr ns;
-		xmlChar *prefix = xmlStrndup(name, len);
-		if (prefix && xmlStrEqual(prefix, (xmlChar *)"xmlns")) {
+		if (strncmp((const char *) name, "xmlns:", len + 1) == 0) {
 			ns = elem->nsDef;
 			while (ns) {
 				if (xmlStrEqual(ns->prefix, nqname)) {
@@ -168,9 +167,9 @@ static xmlNodePtr dom_get_dom1_attribute(xmlNodePtr elem, xmlChar *name) /* {{{
 				}
 				ns = ns->next;
 			}
-			xmlFree(prefix);
 			return (xmlNodePtr)ns;
 		}
+		xmlChar *prefix = xmlStrndup(name, len);
 		ns = xmlSearchNs(elem->doc, elem, prefix);
 		if (prefix != NULL) {
 			xmlFree(prefix);