WooCommerce TTFB under 300ms.

Server response time is the invisible foundation of WooCommerce performance. Every other speed metric — LCP, FCP, page load — starts after TTFB. If your server takes 1500ms to start sending HTML, no amount of front-end optimisation can rescue you. The hero image can be 50KB and preloaded perfectly; the user still stares at a blank screen for a second and a half before anything happens.

On WooCommerce, slow TTFB is almost always the result of running the wrong stack rather than running it wrong. Shared hosting with PHP 7.4, no OPcache, no object caching, and a database that's never been indexed properly will give you 1500–3000ms TTFB on cart and checkout no matter what you do at the front-end. The fix is to rebuild the foundation.

That starts with hosting. Managed WooCommerce hosting (Kinsta, RocketNet, Cloudways with Vultr High Frequency) gives you NGINX or LiteSpeed, PHP 8.3 with OPcache and JIT, server-level page caching with proper bypass rules, and isolated resources so you're not competing with hundreds of other sites. Just moving from shared hosting to a properly tuned managed environment typically halves TTFB.

Then Redis object caching halves it again on the pages that can't be page-cached — cart, checkout, admin, account, search. Database optimisation handles the long tail: cleaning up bloated wp_options autoload data, adding indexes to slow product meta queries, archiving old orders. For high-volume stores (1000+ orders/month) we migrate to High-Performance Order Storage which moves orders out of the legacy wp_postmeta structure into a dedicated table — typically a 2–5x speed-up on order screens. PHP 8.3 upgrade rounds it out for a final 30–50% PHP execution speed-up.

End to end, a store that started at 1500ms TTFB usually ends up at 200–300ms uncached and under 50ms cached. Admin work that took 8 seconds takes 2. Cart and checkout convert better because there's no perceptible wait. The server costs the same or less than before because it's actually being used efficiently.