Skip to content

Performance

testing

  • Lab data(lighthouse - one time) - improve site
  • field data(real world) - is my site fast?

statistics

  • average score
  • a lot of different possibilities
  • Percentiles
  • p50, p75, p95, p99

lighthouse

  • popup developer tools
  • turn on responsive mode(iphone 12 pro) 5RfGyjtest
  • 6x slowdown

tools

RUM(realtime user monitoring)

all users, not only google chrome users

goals

  • 20% faster than competitors

Points

LCP

  • largest contentful paint
  • first paint
  • first contentful paint

CLS

  • cumulative layout shift

INP

  • interaction to next paint