Rails::Patch::Json::Encode

This is a monkey patch for Rails in order to speed up its JSON encoding, and to draw people's attention to this Rails issue.

For full details please read Jason Hutchens' blog post.

All credits goes to Jason Hutchens for discovering the issue and providing the code for this monkey patch.

Usage

First, go to your Rails console and type:

data = Hash.new
key = 'aaa'
1000.times { data[key.succ!] = data.keys }
1000 * Benchmark.realtime { data.to_json }

See how Rails performs before the patch.

Then bundle install this gem with a fast JSON encoding gem in your Rails' Gemfile.

gem 'rails-patch-json-encode'
gem 'oj'

In this case I choose the oj gem, but you can choose a JSON gem that multi_json supports.

Rails should now use the faster encoder. Now restart your console again and re-run the test to see how the performance changes.

The actual performance boost on real-world applications will probably be less than that. For one of my page I see the rendering time dropped by 25%.

This gem may break your app. Test your app. I am not sure if this is production ready.

This is just a temporal monkey patch, and a monkey patch isn't supposed to have a fancy name.