methodology / Performance / #8

Mobile PageSpeed score + Core Web Vitals (LCP, FCP, CLS)

live factor #8 · Performance · scoring impl: implemented · weight 7.1%

What we measure

How fast your site feels on a mobile phone. Google uses these scores to decide search rankings, and visitors abandon slow sites within 3 seconds.

How to improve your score

Compress images (WebP/AVIF), lazy-load below-fold media, defer non-critical JavaScript, use a CDN.

Data source

Data source for this factor is not yet documented.

Scoring

Scoring formulas are versioned with the methodology. The current method (v1.1.0) maps raw measurements to pass, warn, fail. Factor weights determine how much each contributes to the composite — see the methodology index for the full table.

Version history

← back to methodology