Performance improvements

lib/bundler/index.rb

@@ -8,6 +8,9 @@ def self.build
       i
     end
 
+    attr_reader :specs
+    protected   :specs
+
     def initialize
       @cache = {}
       @specs = Hash.new { |h,k| h[k] = [] }
@@ -17,7 +20,10 @@ def initialize_copy(o)
       super
       @cache = {}
       @specs = Hash.new { |h,k| h[k] = [] }
-      merge!(o)
+
+      o.specs.each do |name, array|
+        @specs[name] = array.dup
+      end
     end
 
     def empty?
@@ -59,7 +65,7 @@ def <<(spec)
       arr = @specs[spec.name]
 
       arr.delete_if do |s|
-        s.version == spec.version && s.platform == spec.platform
+        same_version?(s.version, spec.version) && s.platform == spec.platform
       end
 
       arr << spec
@@ -91,10 +97,21 @@ def ==(o)
 
     def search_by_spec(spec)
       @specs[spec.name].select do |s|
-        s.version == spec.version && Gem::Platform.new(s.platform) == Gem::Platform.new(spec.platform)
+        same_version?(s.version, spec.version) && Gem::Platform.new(s.platform) == Gem::Platform.new(spec.platform)
       end
     end
 
+    def same_version?(a, b)
+      regex = /^(.*?)(?:\.0)*$/
+
+      ret = a.to_s[regex, 1] == b.to_s[regex, 1]
+    end
+
+    def spec_satisfies_dependency?(spec, dep)
+      return false unless dep.name === spec.name
+      dep.requirement.satisfied_by?(spec.version)
+    end
+
     def search_by_dependency(dependency)
       @cache[dependency.hash] ||= begin
         specs = @specs[dependency.name]

lib/bundler/source.rb

@@ -158,7 +158,7 @@ def installed_specs
         @installed_specs ||= begin
           idx = Index.new
           have_bundler = false
-          Gem::SourceIndex.from_installed_gems.to_a.reverse.each do |dont_use_this_var, spec|
+          Gem.source_index.to_a.reverse.each do |dont_use_this_var, spec|
             next if spec.name == 'bundler' && spec.version.to_s != VERSION
             have_bundler = true if spec.name == 'bundler'
             spec.source = self
@@ -185,27 +185,24 @@ def installed_specs
 
       def cached_specs
         @cached_specs ||= begin
-          idx = Index.new
-          @caches.each do |path|
-            Dir["#{path}/*.gem"].each do |gemfile|
-              next if gemfile =~ /bundler\-[\d\.]+?\.gem/
-
-              # Try to skip decompressing the gem to get at the gemspec if possible
-              cached_gemspec = gemfile.gsub(%r{cache/(.*?)\.gem}, 'specifications/\1.gemspec')
-              s = Gem::Specification.load(cached_gemspec) if File.exist?(cached_gemspec)
-
-              begin
-                s ||= Gem::Format.from_file_by_path(gemfile).spec
-              rescue Gem::Package::FormatError
-                raise GemspecError, "Could not read gem at #{gemfile}. It may be corrupted."
-              end
+          idx = installed_specs.dup
+
+          path = Bundler.app_cache
+          Dir["#{path}/*.gem"].each do |gemfile|
+            next if gemfile =~ /bundler\-[\d\.]+?\.gem/
 
-              s.source = self
-              idx << s
+            begin
+              s ||= Gem::Format.from_file_by_path(gemfile).spec
+            rescue Gem::Package::FormatError
+              raise GemspecError, "Could not read gem at #{gemfile}. It may be corrupted."
             end
+
+            s.source = self
+            idx << s
           end
-          idx
         end
+
+        idx
       end
 
       def remote_specs