Blog: cache warming and CDN caching
How CDN caches go cold after a deploy, what that costs, and how to warm them. For definitions, see the cache warming glossary.
Why cache warming matters after a purge
What cache warming is, what happens to a CDN after a purge or deploy, and how a cold cache affects origin load, TTFB, LCP and crawling.
Top 10 CDNs in 2026 for caching and warming
Ten CDNs scored on cache-status headers, purge, origin protection, CDN-only TTLs and stale serving, from vendor docs read in October 2026.
Warm your cache after every deploy
sitewarm requests the pages in your sitemap after a deploy and reports the cache state the CDN returns for each one, with the vantage point it was measured from.