Save the terrible website

Briefing

Given a genuinely bad page, which fixes actually move the metrics, and which ones feel productive but change nothing?

LCP 7.8s. INP 840ms. CLS 0.42. 4.8MB of JavaScript. You have a budget and a mission.

Laboratory

Performance Lab

Level

SYSTEMS

Estimated time

15 minutes

Method

interactive

Variables under observation

LCPINPCLScritical pathbundle sizeimage optimisation