QuantumCache for WordPress

QuantumCache accelerates WordPress by caching database query results and content fragments used to build pages. Instead of caching entire HTML pages, it reduces the database work required to render pages while preserving WordPress’s native invalidation behavior.

It is not an output buffer or page cache, and it does not replace existing page caching solutions.

Features

Caches the results of the main front-end WP_Query for anonymous requests.

Tag-based invalidation: purge by post ID, post type, or taxonomy.

Fragment caching for the_content (classic) and core blocks such as core/post-content, core/latest-posts, core/archives, and core/navigation.

Multiple storage modes:

Auto – use Redis if available, otherwise fall back to MySQL.

Redis – fastest mode; uses the PHP Redis extension.

MySQL – portable fallback using compact tables (qc_entries, qc_tagmap).

Compatible with the Redis Object Cache drop-in.

Avoids wp_options and postmeta storage – all cache data is stored in Redis or

QuantumCache-owned database tables.

Multisite-aware: per-site prefixes and per-site tables.

WP-CLI commands: wp quantumcache flush and wp quantumcache status.

Metrics data layer: persistent hit, miss, store, and purge event counters available via Metrics::totals() and Metrics::deltas().