Help Test MiniRacer.md

MiniRacer https://github.com/discourse/mini_racer is ready for testing.

Can you help out measuring how it improves performance for rake assets:precompile in your app?

• Run:

rm -fr public/assets
RAILS_ENV=production time bundle exec rake assets:precompile

• Edit Gemfile. Remove therubyracer, add:

gem 'execjs', github: 'rails/execjs'
gem 'mini_racer'

• bundle install

• Run:

rm -fr public/assets
RAILS_ENV=production time bundle exec rake assets:precompile

Results after running rm -rf public/assets tmp/cache/assets before runs:

therubyracer:
67.42s user 3.39s system 95% cpu 1:14.36 total

mini_racer:
55.45s user 3.28s system 97% cpu 59.960 total

Cleared caches and made sure spring wasn't running. Results:

therubyracer: 3m50s user
mini_racer: 1m48s user