String#to_xs uses the fast_xs extension if available for Builder speedup.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7773 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

4 files changed, 14 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/array/conversions.rb b/activesupport/lib/active_support/core_ext/array/conversions.rb
index 8205843a2b..89a4499369 100644
--- a/activesupport/lib/active_support/core_ext/array/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/array/conversions.rb
@@ -1,3 +1,5 @@
+require 'builder'
+
 module ActiveSupport #:nodoc:
   module CoreExtensions #:nodoc:
     module Array #:nodoc:
diff --git a/activesupport/lib/active_support/core_ext/hash/conversions.rb b/activesupport/lib/active_support/core_ext/hash/conversions.rb
index 97b4301bdd..6ac913e5b9 100644
--- a/activesupport/lib/active_support/core_ext/hash/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/hash/conversions.rb
@@ -2,6 +2,7 @@ require 'date'
 require 'xml_simple'
 require 'cgi'
 require 'base64'
+require 'builder'
 
 # Extensions needed for Hash#to_query
 class Object
diff --git a/activesupport/lib/active_support/core_ext/string.rb b/activesupport/lib/active_support/core_ext/string.rb
index 724b2af2ee..b3e1b1189a 100644
--- a/activesupport/lib/active_support/core_ext/string.rb
+++ b/activesupport/lib/active_support/core_ext/string.rb
@@ -4,6 +4,7 @@ require 'active_support/core_ext/string/access'
 require 'active_support/core_ext/string/starts_ends_with'
 require 'active_support/core_ext/string/iterators' unless 'test'.respond_to?(:each_char)
 require 'active_support/core_ext/string/unicode'
+require 'active_support/core_ext/string/xchar'
 
 class String #:nodoc:
   include ActiveSupport::CoreExtensions::String::Access
diff --git a/activesupport/lib/active_support/core_ext/string/xchar.rb b/activesupport/lib/active_support/core_ext/string/xchar.rb
new file mode 100644
index 0000000000..d6aa4aa036
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/string/xchar.rb
@@ -0,0 +1,10 @@
+begin
+  require 'fast_xs'
+
+  class String
+    alias_method :original_xs, :to_xs if method_defined?(:to_xs)
+    alias_method :to_xs, :fast_xs
+  end
+rescue LoadError
+  # fast_xs extension unavailable.
+end