Agenda
- Warm-up: Spot the Bug — an optimisation that changed the answer
- The Efficiency Case, day 2 — working period: the rewrite, with the tests from the original still passing
- Watch the arithmetic: How Numbers Actually Fit on why a faster sum can be a wrong one
- Last ten minutes: bring me both of your measurement tables. I mark one thing to change, and tomorrow’s period opens with it.
Things to do before our next class
- Rewrite working; both versions agree on every test.