• June 20, 2026

  Profile First: A 10x Faster Django Test Suite

  The Rust Platform Django test suite took 30 seconds to run. I had a hunch it was database-related. Of course I was wrong. I profiled it with cProfile and cut it from 30 to 3 seconds.

• June 3, 2026

  How to Tell if Your Python Mock Is Actually Working

  A test can pass for the wrong reason. When you're mocking a third-party API call, the test might look green because the real API happened to return an error, not because your mock did anything at all.