From 344467a686f8dd52d9cf5ad2402f9060f43b18e1 Mon Sep 17 00:00:00 2001
From: Christian Hofstaedtler <c.hofstaedtler@efficientcloud.com>
Date: Thu, 7 Jul 2011 23:55:37 +0200
Subject: [PATCH] Make remote_specs 300% faster.

---
 lib/bundler/index.rb  |  7 +++++--
 lib/bundler/source.rb | 14 ++++++++++----
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/lib/bundler/index.rb b/lib/bundler/index.rb
index 4d7f77251dc..c26574fa3cf 100644
--- a/lib/bundler/index.rb
+++ b/lib/bundler/index.rb
@@ -78,10 +78,13 @@ def each(&blk)
       end
     end
 
-    def use(other)
+    def use(other, override_dupes = false)
       return unless other
       other.each do |s|
-        next if search_by_spec(s).any?
+        if (dupes = search_by_spec(s)) && dupes.any?
+          next unless override_dupes
+          @specs[s.name] -= dupes
+        end
         @specs[s.name] << s
       end
       self
diff --git a/lib/bundler/source.rb b/lib/bundler/source.rb
index 29e5139a1d2..3f26e912dfe 100644
--- a/lib/bundler/source.rb
+++ b/lib/bundler/source.rb
@@ -158,11 +158,17 @@ def normalize_uri(uri)
       end
 
       def fetch_specs
-        Index.build do |idx|
-          idx.use installed_specs
-          idx.use cached_specs if @allow_cached || @allow_remote
-          idx.use remote_specs if @allow_remote
+        # remote_specs usually generates a way larger Index than the other
+        # sources, and large_idx.use small_idx is way faster than
+        # small_idx.use large_idx.
+        if @allow_remote
+          idx = remote_specs.dup
+        else
+          idx = Index.new
         end
+        idx.use(cached_specs, :override_dupes) if @allow_cached || @allow_remote
+        idx.use(installed_specs, :override_dupes)
+        idx
       end
 
       def installed_specs