Avatar Privacy vs QuantumCache

Avatars from Gravatar.com are great, but they come with certain privacy implications. You as site admin may already know this, but your visitors and users probably don’t. Avatar Privacy can help to improve the privacy situation by making some subtle changes to the way avatars are displayed on your site. The plugin works without changing your theme files (for reasonably modern themes), and it does support multisite installations. Please note that the plugin does not provide an options page of its own, it rather adds to the existing discussion settings page. Features The plugin’s features summed up: Self-uploaded avatars for users (and custom default images), hosted on your server. Users and commenters explicitly opt-in before using gravatars. Gravatar caching to ensure the privacy of your website visitors. Don’t publish weakly encrypted e-mail addresses of comment authors. A more detailed examination of the reasons for using Avatar Privacy can be found on the plugin homepage. WP-CLI Commands Avatar Privacy includes the following WP-CLI commands: wp avatar-privacy db show: Show information about the custom database table(s). wp avatar-privacy db list: List entries in the custom database table(s). wp avatar-privacy db create: Create the custom database table. wp avatar-privacy db upgrade: Upgrade the structure of the custom database table. wp avatar-privacy default get-custom-default-avatar: Show information about the custom default avatar for the site. wp avatar-privacy default set-custom-default-avatar: Set a custom default avatar for the site. wp avatar-privacy default delete-custom-default-avatar: Delete the custom default avatar for the site. wp avatar-privacy cron list: List active cron jobs created by the plugin. wp avatar-privacy cron delete: Delete cron jobs created by the plugin. wp avatar-privacy user set-local-avatar: Set a local avatar image for a user. wp avatar-privacy user delete-local-avatar: Delete the local avatar image for a user. wp avatar-privacy uninstall: Remove data added by Avatar Privacy. Feedback Please report any problems with the plugin, I’ll do my best to sort things out. You can use the contact form on my code site or create a topic in the support forum. You can contact me in German or English. Credits Avatar Privacy is based on the original plugin by Johannes Freudendahl. The new release also includes work by several other people: Daniel Mester Pirttijärvi (Jdenticon), Shamus Young (Wavatars), Andreas Gohr (the original MonsterID and RingIcon), Scott Sherrill-Mix & Katherine Garner (the hand-drawn monster update) Benjamin Laugueux, Grummfy, Lucas Michot & Arjen van der Meijden (Identicon), David Revoy (Bird and Cat Avatars), Zikri Kader, Colin Davis & Nimiq (RoboHash), and Johanna Amann (the Avatar Privacy icon).

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(). Performance summary In benchmarks on a plugin-heavy WordPress site (WooCommerce + Yoast SEO), QuantumCache reduced per-request database queries by up to ~99% on cached pages and achieved cache hit rates exceeding 97% with Redis. In the benchmark environment: Redis mode reduced warm TTFB by roughly 23–27% and total response time by 18–21% versus an uncached baseline. MySQL fallback mode delivered modest improvements (~3–10%) when Redis was unavailable. Actual results depend on theme complexity, plugin load, database topology, and traffic patterns. When to use QuantumCache QuantumCache is useful when: Your site already uses a page cache (such as a CDN, reverse proxy, or caching plugin) but WordPress still performs significant database work. You want faster response times without relying solely on full-page caching. Your hosting environment supports Redis, or you want a portable MySQL fallback. QuantumCache complements page caching rather than replacing it. What QuantumCache does NOT do QuantumCache is not a page cache or full HTML cache. It does not replace solutions such as: * CDN caching * reverse proxy caches * traditional WordPress page caching plugins Instead, QuantumCache reduces the database work required to build pages, making those systems more effective. Debug headers (optional) Enable Settings → QuantumCache → Send X-QC debug headers to view cache status in HTTP responses: * X-QC-Main: HIT | MISS | STORE * X-QC-Store: AUTO | redis | mysql * X-QC-Hydrated: number of posts loaded from cache Append ?qc_nocache=1 to any URL to bypass caching for that request. Debug headers are sent only when explicitly enabled in settings and contain no personal or user-specific data. WP-CLI commands QuantumCache provides the following WP-CLI commands: wp quantumcache status Shows the active backend, storage mode, and lifetime cache counters. wp quantumcache flush Clears all cache entries for the current site. Use –yes to skip the confirmation prompt. QuantumCache Pro QuantumCache Pro extends the core engine with advanced caching capabilities for WooCommerce and logged-in users. See: https://quantumcache.io Privacy QuantumCache does not collect, send, or log personal data. It stores cache entries in Redis or its own MySQL tables. Other plugins on your site may handle cookies or data independently. No remote requests are made, and no data is transmitted to external servers.