Measuring where the time actually goes - TTFB, LCP, cold starts - and the fixes that survive a second measurement.
24 August 2026 · Luan Nguyen
Real user data said our Worker spent 1.8s thinking before sending a byte. I had a theory, shipped the fix, and the fix that worked was not the one I was proud of. Waterfalls, cold starts, and one measurement that saved the story.
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