From ebc6120f99ac5665efa4cfb84b5c6c898238c477 Mon Sep 17 00:00:00 2001
From: joey <joey@0fa5a96a-9a0e-0410-b3b2-a0fd24251071>
Date: Tue, 4 Jul 2006 03:42:19 +0000
Subject: [PATCH]   * Work around very innefficient behavior in
 File::Spec::abs2rel. Result     is a savings of 2 pointless fork/execs per
 link calculation, which     results in ~25% speedup of ikiwiki building its
 own doc wiki, and     about 35% speedup displaying RecentChanges!

---
 IkiWiki.pm        | 16 ++++++++++++++--
 IkiWiki/Render.pm |  3 +--
 debian/changelog  | 10 +++++++---
 3 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/IkiWiki.pm b/IkiWiki.pm
index d7c082b1d..56a27b3b0 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -260,6 +260,19 @@ sub styleurl (;$) { #{{{
 	return $page."style.css";
 } #}}}
 
+sub abs2rel ($$) {
+	# Work around very innefficient behavior in File::Spec if abs2rel
+	# is passed two relative paths. It's much faster if paths are
+	# absolute!
+	my $path="/".shift;
+	my $base="/".shift;
+
+	require File::Spec;
+	my $ret=File::Spec->abs2rel($path, $base);
+	$ret=~s/^// if defined $ret;
+	return $ret;
+}
+
 sub htmllink ($$$;$$$) { #{{{
 	my $lpage=shift; # the page doing the linking
 	my $page=shift; # the page that will contain the link (different for inline)
@@ -292,8 +305,7 @@ sub htmllink ($$$;$$$) { #{{{
 			"\">?</a>$linktext</span>"
 	}
 	
-	require File::Spec;
-	$bestlink=File::Spec->abs2rel($bestlink, dirname($page));
+	$bestlink=abs2rel($bestlink, dirname($page));
 	
 	if (! $noimageinline && isinlinableimage($bestlink)) {
 		return "<img src=\"$bestlink\" alt=\"$linktext\" />";
diff --git a/IkiWiki/Render.pm b/IkiWiki/Render.pm
index 404726930..d88ec93d3 100644
--- a/IkiWiki/Render.pm
+++ b/IkiWiki/Render.pm
@@ -4,7 +4,6 @@ package IkiWiki;
 
 use warnings;
 use strict;
-use File::Spec;
 use IkiWiki;
 use Encode;
 
@@ -48,7 +47,7 @@ sub backlinks ($) { #{{{
 	foreach my $p (keys %links) {
 		next if bestlink($page, $p) eq $page;
 		if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
-			my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
+			my $href=abs2rel(htmlpage($p), dirname($page));
 			
 			# Trim common dir prefixes from both pages.
 			my $p_trimmed=$p;
diff --git a/debian/changelog b/debian/changelog
index 7fc285bcb..08e2142d1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -32,14 +32,18 @@ ikiwiki (1.8) UNRELEASED; urgency=low
   * Add a html plugin, which can be used to write wikis in raw html,
     if you'd ever want to do such a thing. Slightly tricky, since ikiwiki
     defaults to not processing .html files, since w/o this plugin they would
-    be copied unsanitised. With this plugin, it will process, and html
+    be copied unsanitised. With this plugin, it will process and html
     sanitise them, like any other page type.
   * Rebuilding wrappers is necessary on upgrade to this version.
   * Make ikiwiki --setup --refresh rebuild wrappers, so wrapper rebuild
     will be automatically done on all upgrades.
-  * Don't sent pings if the wiki is being rebuilt.
+  * Don't send pings if the wiki is being rebuilt.
+  * Work around very innefficient behavior in File::Spec::abs2rel. Result
+    is a savings of 2 pointless fork/execs per link calculation, which
+    results in ~25% speedup of ikiwiki building its own doc wiki, and
+    about 35% speedup displaying RecentChanges!
 
- -- Joey Hess <joeyh@debian.org>  Mon,  3 Jul 2006 21:01:28 -0400
+ -- Joey Hess <joeyh@debian.org>  Mon,  3 Jul 2006 23:33:57 -0400
 
 ikiwiki (1.7) unstable; urgency=low
 
-- 
2.26.2