Columbia Games · WordPress / 9 June 2026
WPCache: a faster site came with a new layer of state
Caching improved delivery performance, but it immediately introduced a new question: what must be invalidated, and when, so the site does not serve stale content faster.
Situation
Installing a cache plugin looks like a simple performance task. On a legacy WordPress site, however, apparently static pages may depend on login state, cart-like behaviour, dynamic widgets or admin previews. Caching everything aggressively can trade correctness for speed.
Approach
I verified the WPCache configuration route by route. I checked cache headers on public pages, exceptions for authenticated state and whether frontend content actually refreshed after an edit. Cache clearing was documented as part of release and content workflows rather than treated as an occasional admin-button operation.
Outcome
Caching noticeably improved delivery without breaking the known dynamic paths. It also added another state layer to the system, so cache behaviour became part of the later troubleshooting runbook instead of an invisible optimization.