FSE Series 11: Optimising Block Theme Speed
Block themes can be fast or bloated — FSE speed depends on image discipline, caching, and limiting plugins, especially for SA mobile users.
Image optimisation
WebP, correct dimensions, lazy load below fold — hero image sized for mobile.
Caching
LiteSpeed or similar on SA hosting — page cache for anonymous visitors.
Lean block usage
Fewer nested columns and sliders — each adds markup and CSS.
Font loading
Limit font families in global styles — system fonts load fastest.
Measure
PageSpeed on mobile before launch. Page speed priority.
Site slow after a block theme switch?
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