[Mono-bugs] [Bug 60175][Nor] New - Slow GetHostByName

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Changed by lluis@ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=60175

--- shadow/60175	2004-06-14 19:33:05.000000000 -0400
+++ shadow/60175.tmp.7013	2004-06-14 19:33:05.000000000 -0400
@@ -0,0 +1,39 @@
+Bug#: 60175
+Product: Mono: Runtime
+Version: unspecified
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: misc
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: lluis@ximian.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Slow GetHostByName
+
+In my RH9 Dns.GetHostByName() takes a lot of time to resolve an address. I
+found out that all that time is spent trying to resolve the name in IPv6. I
+can easily fix this by only trying IPv6 lookup if the IPv4 lookup fails,
+doing something like this:
+
+-	while (gethostbyname2_r(hostname, AF_INET6, &he2, buffer2,
+-				buffer_size2, &hp2, &herr) == ERANGE) {
+-		buffer_size2 *= 2;
+-		buffer2 = g_realloc(buffer2, buffer_size2);
++	if (hp1 == NULL)
++	{
++		while (gethostbyname2_r(hostname, AF_INET6, &he2, buffer2,
++					buffer_size2, &hp2, &herr) == ERANGE) {
++			buffer_size2 *= 2;
++			buffer2 = g_realloc(buffer2, buffer_size2);
++		}
+ 	}
++	else
++		hp2 = NULL;
+
+I'm not sure this is correct, but it makes sense to me.