Mobile LCP: 3.5 s on the home page, simulated

Home page, median of three runs on the V8 build: 3.5 seconds under Lighthouse's simulated slow phone (performance score 90), and 2.3 seconds with the network and processor really throttled. The same method on the build before this pass read 3.7 seconds (score 89). We cut the JavaScript every page loads by about 45 kB compressed by keeping the concept studies' copy out of the shared bundle; the hero image was already sized, preloaded and the only high-priority image. The simulated figure still misses our own 2.5-second gate, so this point stays a failure until the deployed site passes it.

Fail·Measured on 10 October 2026·Our own audit, point 02

Target, not a result: Largest Contentful Paint of 2.5 seconds or less on mobile

The whole audit

Method

Lighthouse 13.5.0 mobile preset (moto-G class CPU throttling, slow 4G) on the production build served locally before launch (next build, then next start): commit 0c6efff for the median of three runs, repeated on commit f8746ba served at localhost:3390 with the same 3.5-second simulated result

Limits of this reading

• Measured on a production build served locally before launch. The deployed site is re-measured on its live address at launch.
• Lighthouse figures move by a few points between runs; home is a median of three for that reason.
• It stays on the ledger, marked as a failure, until a later dated record shows it fixed.