Add fast-path for Object#to_json(escape: false)

Co-authored-by: Jean Boussier <jean.boussier@gmail.com>

Author: etiennebarrie

activesupport/lib/active_support/json/encoding.rb

@@ -44,7 +44,7 @@ class << self
       #   ActiveSupport::JSON.encode({ key: "\u2028<>&" }, escape: false)
       #   # => "{\"key\":\"\u2028<>&\"}"
       def encode(value, options = nil)
-        if options.nil? || options.empty?
+        if options.nil? || options.empty? || options == { escape: false }.freeze
           Encoding.encode_without_options(value)
         else
           Encoding.json_encoder.new(options).encode(value)
@@ -161,7 +161,14 @@ class JSONGemCoderEncoder # :nodoc:
 
 
           def initialize(options = nil)
-            @options = options ? options.dup.freeze : {}.freeze
+            if options
+              options = options.dup
+              @escape = options.delete(:escape) { true }
+              @options = options.freeze
+            else
+              @escape = true
+              @options = {}.freeze
+            end
           end
 
           # Encode the given object into a JSON string
@@ -170,7 +177,7 @@ def encode(value)
 
             json = CODER.dump(value)
 
-            return json unless @options.fetch(:escape, true)
+            return json unless @escape
 
             # Rails does more escaping than the JSON gem natively does (we
             # escape \u2028 and \u2029 and optionally >, <, & to work around