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Numbers that survived a postmortem.

Production metrics from systems I've owned. Not throwaway demos — these are the receipts.

384ms — p95 latency

−38% · checkout · BookMyShow

94% — server errors

−94% · vs Q3 2022 baseline

2.9m — ci build time

−79% · turbo · nx · 12 pkgs

98/100 — lighthouse

+22 · videoverse · prod

4.7/5 — devx survey

+1.4 · internal · 80 eng

87% — test coverage

+34pp · playwright e2e