Question 1

What are the desktop Core Web Vitals for developer.mozilla.org?

Accepted Answer

developer.mozilla.org desktop-only p75 metrics from Google CrUX: LCP 919ms (good), INP 38ms (good), CLS 0.020 (good). Desktop typically shows better LCP + INP than mobile due to faster hardware + network.

Question 2

Why is desktop performance better than mobile for developer.mozilla.org?

Accepted Answer

Desktop hardware (more CPU, more RAM, wired network) typically renders pages faster than mobile (battery-constrained CPU, slower cellular). Most sites show 30-60% faster LCP + 40-70% lower INP on desktop. CLS varies less by device. Compare directly at /developer.mozilla.org/mobile for the same time window.

Question 3

How current is the desktop CrUX data for developer.mozilla.org?

Accepted Answer

Collection window: 2026-08-23T00:00:00.000Z to 2026-09-19T00:00:00.000Z. Google CrUX publishes monthly aggregates; data is 28-day p75 trailing. Refresh cadence is automated.