Active installations10Adoption metric — not a quality score
WordPress.org rating5.0 / 5 from 1 ratings
Official packageDirect from WordPress.org
Repository metrics are context, not quality scores. Active installations measure adoption and can strongly reflect a plugin’s age and historical popularity. Ratings, recent updates and “Tested up to” metadata also do not guarantee modern code, error-free operation, security, feature completeness or suitability for a particular site. Why active installs don’t tell the whole story →
WP PlugIndex currently records Yac Object Cache version 1.4.1 as active, updated 14d ago and tested up to WordPress 7.1.
Overview
About this plugin
Yac keeps the cache in a shared memory segment accessible to all PHP workers, so a read is a hash lookup in local memory — no cache server, no socket, no network.
Highlights
Fast. No socket, no network, no global lock, so throughput scales with workers. Yac’s own benchmark measured 13x-70x higher ops/s than APCu and 170x-730x higher than local Memcached, depending on value size. On the author’s own site ( www.laruence.com ) that translated to page renders coming out 19% faster than with the Memcached drop-in.
Nothing to operate. No cache server to install, secure, monitor or restart.
Health you can read. Hit rate, hits and misses charted over Today / Yesterday / Last 7 days, with a diagnosis that also says when not to add memory.
Fails soft. No extension, or yac.enable=0, degrades to a per-request cache and the site keeps serving.
Best fit
Single-node or few-node installs where all PHP workers share a machine. For multi-server clusters needing cross-node consistency, a network cache (Memcached/Redis) suits better.
WordPress.org metadata
Plugin tags
Topics listed for this plugin in the WordPress.org directory.
object cache
shared memory
performance
yac
Compatibility & maintenance
Compatibility & maintenance
Tested with WP 7.1
Marked as tested with the current WordPress 7.1 release.
Current WordPress releaseWordPress 7.1
WordPress.org Tested up to7.1
Minimum requirementsWordPress 5.6 · PHP 7.0
Update activity19 Oct 202614d ago
“Tested up to” is directory metadata supplied by the plugin author. WP PlugIndex does not turn an older declaration into a claim that the plugin is incompatible.
Changes recorded by WP PlugIndex
Recent tracked changes
Version1.4.0→1.4.1
WordPress compatibility7.1.2→7.1.3
Version1.3.1→1.4.0
WordPress compatibility7.1→7.1.2
Version1.3.0→1.3.1
Version1.2.2→1.3.0
Tracking & source
WP PlugIndex tracks public WordPress.org directory metadata and records selected version, compatibility and availability changes as they are detected.
