https://warmup.rocks/blog/ Deep dives on CDN caching, cache warming, hit ratios, TTFB and web performance. en Fri, 17 Jul 2026 00:00:00 GMT https://warmup.rocks/blog/diy-cache-warming-script https://warmup.rocks/blog/diy-cache-warming-script A cache warming script is twenty lines of bash — here it is. When cron + curl is genuinely enough, where single-location warming quietly stops working, and how to decide build vs. buy with three questions. Fri, 17 Jul 2026 00:00:00 GMT Comparison https://warmup.rocks/blog/cdn-cache-miss-data https://warmup.rocks/blog/cdn-cache-miss-data Original data from 48 hours of cache warming: a cache miss is 3.5× slower than a hit at the median (878 ms vs 253 ms), and steady-state miss rates vary from 0.0% to 9.4% between Cloudflare colos. Full methodology included. Fri, 17 Jul 2026 00:00:00 GMT Data https://warmup.rocks/blog/wordpress-cache-warming https://warmup.rocks/blog/wordpress-cache-warming WordPress has two caches to warm: the page cache on your server and the CDN edge cache. How WP Rocket, LiteSpeed and FlyingPress preload works, what it misses, and how to keep WooCommerce fast. Thu, 16 Jul 2026 00:00:00 GMT WordPress https://warmup.rocks/blog/varnish-cache-warming https://warmup.rocks/blog/varnish-cache-warming Varnish starts empty after every restart and every ban. How to warm Varnish with sitemap crawls, grace mode and hash_always_miss — and why the CDN in front of it needs its own warming. Thu, 16 Jul 2026 00:00:00 GMT Varnish https://warmup.rocks/blog/shopify-cache-warming https://warmup.rocks/blog/shopify-cache-warming Shopify runs its own CDN and cache — so is cache warming even possible? What Shopify caches, where cold starts still happen, and when warming helps headless Hydrogen or Plus stores. Thu, 16 Jul 2026 00:00:00 GMT Shopify https://warmup.rocks/blog/magento-cache-warming https://warmup.rocks/blog/magento-cache-warming How to warm Magento 2's Full Page Cache and Varnish after cache flushes, deploys and reindexing — and why the CDN edge cache needs its own warming strategy. Thu, 16 Jul 2026 00:00:00 GMT Magento https://warmup.rocks/blog/fastly-cache-warming https://warmup.rocks/blog/fastly-cache-warming Fastly purges globally in ~150 ms — and leaves every POP cold. How Fastly's per-POP caching, shielding and soft purge interact with cache warming, and how to keep hit ratios high after purges. Thu, 16 Jul 2026 00:00:00 GMT Fastly https://warmup.rocks/blog/cloudfront-cache-warming https://warmup.rocks/blog/cloudfront-cache-warming CloudFront caches per edge location, with regional edge caches as a second layer. What invalidations really cost, what Origin Shield does and doesn't do, and how to warm CloudFront properly. Thu, 16 Jul 2026 00:00:00 GMT CloudFront https://warmup.rocks/blog/cloudflare-workers-cache-api https://warmup.rocks/blog/cloudflare-workers-cache-api Running a real Astro + EmDash site on Cloudflare Workers taught us three hard cache lessons: the Cache API is colo-local, it ignores stale-while-revalidate, and every deploy starts cold. Here's what we measured — and what we built because of it. Thu, 16 Jul 2026 00:00:00 GMT Cloudflare Workers https://warmup.rocks/blog/cf-cache-status https://warmup.rocks/blog/cf-cache-status What cf-cache-status HIT, MISS, DYNAMIC, BYPASS, EXPIRED, STALE, REVALIDATED and UPDATING mean, why your HTML shows DYNAMIC, and how to turn every status into a HIT. Thu, 16 Jul 2026 00:00:00 GMT Cloudflare https://warmup.rocks/blog/cache-warmer-alternative https://warmup.rocks/blog/cache-warmer-alternative Looking for a Cache Warmer alternative? The honest comparison: single-location crawlers warm one edge location out of hundreds. How warmup.rocks differs — 90+ locations, per-colo reporting, any CDN. Thu, 16 Jul 2026 00:00:00 GMT Comparison https://warmup.rocks/blog/bunny-cache-warming https://warmup.rocks/blog/bunny-cache-warming bunny.net caches per PoP, and Perma-Cache adds a persistent storage layer. What each layer does for cold starts, how Smart Cache and purges behave, and how to warm bunny.net properly. Thu, 16 Jul 2026 00:00:00 GMT bunny.net https://warmup.rocks/blog/astro-cache-warming https://warmup.rocks/blog/astro-cache-warming Astro sites cache in three layers: prerendered pages, on-demand SSR routes with route caching, and the per-colo edge. Which layer goes cold when, what Astro 7 route caching changes, and how to keep it all warm — from a team running Astro on Workers in production. Thu, 16 Jul 2026 00:00:00 GMT Astro https://warmup.rocks/blog/what-is-cache-warming https://warmup.rocks/blog/what-is-cache-warming Cache warming explained: how proactively filling caches works, which caches can be warmed (CDN, page cache, object cache), and when it's worth automating. Wed, 15 Jul 2026 00:00:00 GMT Fundamentals https://warmup.rocks/blog/time-to-first-byte https://warmup.rocks/blog/time-to-first-byte What TTFB is made of, what a good Time to First Byte looks like, how it caps LCP — and why edge caching is the biggest single lever to improve it. Wed, 15 Jul 2026 00:00:00 GMT Core Web Vitals https://warmup.rocks/blog/cloudflare-cache-warming https://warmup.rocks/blog/cloudflare-cache-warming Cloudflare caches per data center. How to actually preload the Cloudflare cache — classic CDN cache, Workers Cache and Tiered Cache — from every region. Wed, 15 Jul 2026 00:00:00 GMT Cloudflare https://warmup.rocks/blog/cache-hit-ratio https://warmup.rocks/blog/cache-hit-ratio What cache hit ratio means, request vs. byte hit ratio, how to measure it per CDN — and seven concrete levers to raise yours above 90%. Wed, 15 Jul 2026 00:00:00 GMT Metrics