3 ms·GutHub, Shopify, Coinbase, Square, AirBnB, etc. , can probably answer some of your concerns.by hudon 5y agoGutHub, Shopify, Coinbase, Square, AirBnB, etc. , can probably answer some of your concerns.tcoff91 5y agoGitHub feels super slow so I can't say I'm all that surprised to hear it's a rails app.montblanc 5y agoGitlab is also Rails :) But wait it's probably super slow. You should try Jira heard it was wriiten in Java. Must be a fast app then.