Websites use several layers: the browser cache, CDNs, page caches, object caches and PHP’s opcode cache. Each saves a different kind of work.
Cache
A stored copy of something expensive to produce, kept so later requests can be answered instantly.
A stored copy of something expensive to produce, kept so later requests can be answered instantly.
Websites use several layers: the browser cache, CDNs, page caches, object caches and PHP’s opcode cache. Each saves a different kind of work.