Episode 06 game · Vayu · Air

Vayu’s Mirage

Lighthouse says 100. Real users wait 4.2 seconds. Work out which number counts, feel the layout shift, measure the real causes, then spend a three-ticket sprint on the fixes that matter.

VayuI’m the wind, Kai. I don’t care how fast it loads on your laptop. I care how fast it loads on a three-year-old phone, on a train, in the rain.
06Seal 06

1 · The Mirage

Kai’s report and Google’s report don’t agree. Same page, same day.

100
LighthouseKai’s laptop, office Wi-Fi
4.2s
Search Console: LCP poorReal visits, 75th percentile

Which number does Google use to judge the page?

Field beats lab

Google judges real visits at the 75th percentile. Lighthouse is for debugging.

Three vitals

LCP ≤ 2.5s, INP ≤ 200ms, CLS ≤ 0.1.

Measure first

Find the cause with attribution before you optimise anything.