Side-by-Side. Comparison of "optimized" and "wait-for-all"

Shows incrementally-loading + wait-for-all of same repository.

Some example repos:

• lowsky/react-suspense-meetup-demo
• lowsky/gh-dashboard-relay
• lowsky/spotify-graphql-server
• lowsky/spotify-graphql-server-graphql-yoga
• lowsky/spotify-graphql-server-graphql-helix-envelop
• facebook/react