Thomas Edgesmith

[email protected]

Speeding up Phoenix (Elixir) GitHub Action CI

Part of heyAngus, I’ve put together a pretty speedy GitHub Action CI.

With the right dependency & build caching setup, builds take about a min in total from the previous 4 mins.

(mind you the suite right now runs in just 12s)


  • Works with Elixir 1.13.2, otp: 24.1.7
  • Dependency fetching is done in a single standalone job
  • Splits out formatting & credo checks
  • Splits out the actual mix test run
  • Avoids using Postgresql DB checks to shave off 20s+

July 17, 2022   Thomas Edgesmith (@thomasedgesmith)