Memoize some #hash calls

bundler/lib/bundler/lazy_specification.rb

@@ -35,7 +35,7 @@ def eql?(other)
     end
 
     def hash
-      identifier.hash
+      @__hash ||= identifier.hash
     end
 
     ##

bundler/lib/bundler/plugin/api/source.rb

@@ -221,7 +221,7 @@ def ==(other)
         # docstring for `==` method, i.e. two methods equal by above comparison
         # should have same hash.
         def hash
-          [self.class, uri].hash
+          @__hash = [self.class, uri].hash
         end
 
         # A helper method, not necessary if not used internally.

bundler/lib/bundler/resolver/spec_group.rb

@@ -67,7 +67,7 @@ def eql?(other)
       end
 
       def hash
-        name.hash ^ version.hash ^ sorted_activated_platforms.hash ^ source.hash
+        @__hash ||= name.hash ^ version.hash ^ sorted_activated_platforms.hash ^ source.hash
       end
 
       protected

bundler/lib/bundler/rubygems_ext.rb

@@ -177,10 +177,12 @@ def _with_sorted_requirements
     class Requirement
       module CorrectHashForLambdaOperator
         def hash
-          if requirements.any? {|r| r.first == "~>" }
-            requirements.map {|r| r.first == "~>" ? [r[0], r[1].to_s] : r }.sort.hash
-          else
-            super
+          @__hash ||= begin
+            if requirements.any? {|r| r.first == "~>" }
+              requirements.map {|r| r.first == "~>" ? [r[0], r[1].to_s] : r }.sort.hash
+            else
+              super
+            end
           end
         end
       end

bundler/lib/bundler/source/git.rb

@@ -47,7 +47,7 @@ def to_lock
       end
 
       def hash
-        [self.class, uri, ref, branch, name, version, glob, submodules].hash
+        @__hash ||= [self.class, uri, ref, branch, name, version, glob, submodules].hash
       end
 
       def eql?(other)

bundler/lib/bundler/source/metadata.rb

@@ -52,7 +52,7 @@ def ==(other)
       alias_method :eql?, :==
 
       def hash
-        self.class.hash
+        @__hash ||= self.class.hash
       end
 
       def version_message(spec)

bundler/lib/bundler/source/path.rb

@@ -66,7 +66,7 @@ def to_s
       end
 
       def hash
-        [self.class, expanded_path, version].hash
+        @__hash ||= [self.class, expanded_path, version].hash
       end
 
       def eql?(other)

bundler/lib/bundler/source/rubygems.rb

@@ -56,7 +56,7 @@ def cached!
       end
 
       def hash
-        @remotes.hash
+        @__hash ||= @remotes.hash
       end
 
       def eql?(other)

bundler/lib/bundler/vendor/molinillo/lib/molinillo/dependency_graph/vertex.rb

@@ -123,7 +123,7 @@ def shallow_eql?(other)
 
       # @return [Fixnum] a hash for the vertex based upon its {#name}
       def hash
-        name.hash
+        @__hash ||= name.hash
       end
 
       # Is there a path from `self` to `other` following edges in the