Reduce number of created objects in Hash#as_json

2020-01-09 13:21:51 +01:00 · 2020-01-09 13:21:51 +01:00 · 9256ae8a38
parent 3eab31c487
commit 9256ae8a38
1 changed files with 5 additions and 1 deletions
--- a/activesupport/lib/active_support/core_ext/object/json.rb
+++ b/activesupport/lib/active_support/core_ext/object/json.rb
@ -169,7 +169,11 @@ class Hash
      self
    end

-    Hash[subset.map { |k, v| [k.to_s, options ? v.as_json(options.dup) : v.as_json] }]
+    result = {}
+    subset.each do |k, v|
+      result[k.to_s] = options ? v.as_json(options.dup) : v.as_json
+    end
+    result
  end
 end