Merge pull request #35771 from timoschilling/hash-speed-improvements

Hash / HashWithIndifferentAccess speed improvements

activesupport/lib/active_support/core_ext/hash/except.rb

@@ -10,7 +10,7 @@ class Hash
   # This is useful for limiting a set of parameters to everything but a few known toggles:
   #   @person.update(params[:person].except(:admin))
   def except(*keys)
-    dup.except!(*keys)
+    slice(*self.keys - keys)
   end
 
   # Removes the given keys from hash and returns it.

activesupport/lib/active_support/hash_with_indifferent_access.rb

@@ -225,8 +225,8 @@ module ActiveSupport
     #   hash[:a] = 'x'
     #   hash[:b] = 'y'
     #   hash.values_at('a', 'b') # => ["x", "y"]
-    def values_at(*indices)
-      indices.collect { |key| self[convert_key(key)] }
+    def values_at(*keys)
+      super(*keys.map { |key| convert_key(key) })
     end
 
     # Returns an array of the values at the specified indices, but also
@@ -239,7 +239,7 @@ module ActiveSupport
     #   hash.fetch_values('a', 'c') { |key| 'z' } # => ["x", "z"]
     #   hash.fetch_values('a', 'c') # => KeyError: key not found: "c"
     def fetch_values(*indices, &block)
-      indices.collect { |key| fetch(key, &block) }
+      super(*indices.map { |key| convert_key(key) }, &block)
     end
 
     # Returns a shallow copy of the hash.
@@ -293,6 +293,9 @@ module ActiveSupport
       super(convert_key(key))
     end
 
+    def except(*keys)
+      slice(*self.keys - keys.map { |key| convert_key(key) })
+    end
     alias_method :without, :except
 
     def stringify_keys!; self end