advanced · testing
Three Times Faster, Apparently
A teammate says their change makes a function 3× faster and wants to ship it. What do you ask?
Practical scenario
A pull request description reads "optimised the serializer — 3× faster (benchmark included)". The benchmark is a loop over the same 200-byte payload, run once per version, on a laptop.
What it tests
- • Benchmark hygiene as a checklist
- • Whether the candidate connects the micro result to system impact
- • Ability to challenge a claim without being obstructive