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Lighthouse kind of drives you to add (possibly) useless PWA stuff: offline mode with its manifest.json and a webworker, IIRC.
by the_gipsy 5y ago
Lighthouse kind of drives you to add (possibly) useless PWA stuff: offline mode with its manifest.json and a webworker, IIRC.
- pornel 5y agoAnd Google Lighthouse doesn't like progressive images. You can have a well-optimized progressive JPEG that renders with just 15% of the data, but you get dinged for not using Google WebP, and your LCP is counted only when it fully loads (this is a known bug, and it died a painful death in a bikeshed of what a "contentful" image looks like.)
- lelandfe 5y ago> your LCP is counted only when it fully loads Great point. Wonder how it handles things like LQIP
- samhw 5y agoI think the issue is exactly that: 'When a measure becomes a target, it ceases to be a good measure' (https://en.wikipedia.org/wiki/Goodhart%27s_law https://en.wikipedia.org/wiki/Goodhart%27s_law). If you don't specifically optimise for Lighthouse, and then score well in Lighthouse, it's likely a good measure of your site's performance. But if you specifically optimise for Lighthouse and then score well in Lighthouse, it's like practising for a psychiatric examination - it's now measuring your ability to game a test, and not much else.