Avoid N+1 when loading Flipper UI Index

[ericboehs]

Our project has many feature toggles (400+), when accessing the mounted Flipper UI app, it would take 20+ seconds for all the Feature look ups (M2 Max). On slower machines it takes minutes.

This two line change improves load speeds dramatically (22s -> 0.7s).

[ericboehs]

Closing as I'm not able to reproduce with a test app.

rails new flipper-test-app -d postgresql --skip-bundle
cd flipper-test-app; git init .; git add .; git commit -m "Initial commit"
bundle add flipper flipper-ui flipper-active_record; bundle

# Add flipper ui to routes
sed -i '' '/Rails.application.routes.draw do/a\
  mount Flipper::UI.app(Flipper) => "/flipper"
' config/routes.rb

rails generate flipper:active_record
bin/setup
rails runner '1.upto(500) { |i| Flipper.add("feature_#{i}") }'
bin/rails s
time curl http://localhost:3000/flipper/features