From Milliseconds to Millions: The Numbers Driving Web Perf
summary
Slides and numbers drive decisions: concrete wins, not vague topics. Case studies show measurable impact — 6.2–6.4 seconds faster on mobile without touching ad revenue, global load drops from ~16s to ~6s after fixes, a Venezuela anomaly spikes to 400s, and a 300 milliseconds = £8M/year uplift for Trainline. Tool findings matter too: Cloud.typography yields ~25% worse bounce in one A/B test, half a day of work saves ~$100k/year, and targeting start-render (sub-4s) beats chasing raw load time.
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chapters (11)
- 0:00Intro
- 0:56Hi, I'm Harry
- 4:28Ask the Right Questions
- 6:59Motives
- 9:09Gather Data
- 10:04Google Analytics
- 13:30Venezuela
- 21:23What Has Most Impact?
- 25:09Let's Ignore Load
- 36:50Phase Zero
- 42:19Normalise Performance
