From 5a556d178903eb73ed2e240fee34fcfc607b2bb3 Mon Sep 17 00:00:00 2001
From: Nick Ing-Simmons <nick@ni-s.u-net.com>
Date: Sat, 23 Nov 1996 19:54:52 +0000
Subject: [PATCH] AutoLoader::AUTOLOAD optimization

I notice that although *.al are right alongside autosplit.ix the
trick AutoLoader::import uses to speed looking for the latter
is not used to find the *.al files - anyone know why?

On NFS mounted file systems at least, all the failed stats/opens are expensive.
(Sadly I am testing this at home where everything is local...)

p5p-msgid: <199611231954.TAA09921@ni-s.u-net.com>
---
 lib/AutoLoader.pm | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/lib/AutoLoader.pm b/lib/AutoLoader.pm
index fa9a322..be6429e 100644
--- a/lib/AutoLoader.pm
+++ b/lib/AutoLoader.pm
@@ -98,9 +98,22 @@ conflicts when used to split a module.
 =cut
 
 AUTOLOAD {
-    my $name = "auto/$AUTOLOAD.al";
-    # Braces used on the s/// below to preserve $1 et al.
-    {$name =~ s#::#/#g}
+    my $name;
+    # Braces used to preserve $1 et al.
+    {
+     my ($pkg,$func) = $AUTOLOAD =~ /(.*)::([^:]+)$/;
+     $pkg =~ s#::#/#g;
+     if (defined($name=$INC{"$pkg.pm"}))
+      {
+       $name =~ s#^(.*)$pkg\.pm$#$1auto/$pkg/$func.al#;
+       $name = undef unless (-r $name); 
+      }
+     unless (defined $name)
+      {
+       $name = "auto/$AUTOLOAD.al";
+       $name =~ s#::#/#g;
+      }
+    }
     my $save = $@;
     eval {require $name};
     if ($@) {
-- 
2.7.4