WP Manifestindependent plugin directory
manifest / performance / relay-wordpress-plugin

Relay Cache

The next-generation caching. Relay is a modern PHP extension that combines the functions of a Redis client with an in-process shared memory cache.

by NoorDev · github.com/noordevtech/relay-wordpress-plugin · website

★ 0stars

Install

Download source zip No release zip yet

This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.

Install straight from GitHub with WP-CLI:

wp plugin install https://github.com/noordevtech/relay-wordpress-plugin/archive/refs/heads/main.zip
No built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
Readme github.com/noordevtech/relay-wordpress-plugin ↗

Relay Cache — WordPress Plugin

A WordPress object cache plugin backed by the Relay PHP extension. Relay combines a Redis client with an in-process shared memory cache, serving frequently accessed entries directly from PHP memory and avoiding most Redis round-trips.

Why Relay?

  • Up to 8× faster response times vs. PhpRedis for cache-hit heavy workloads
  • Higher hit ratio thanks to a local in-process cache layer
  • Lower Redis load and more stable memory usage
  • Higher throughput under heavy traffic
  • Ideal for high-traffic sites, large WooCommerce stores, headless WordPress, LMS/membership platforms, and performance-focused hosting stacks.

Requirements

Installation

  1. Copy this plugin directory to wp-content/plugins/relay-cache.
  2. Activate Relay Cache in the WordPress admin.
  3. Go to Settings → Relay Cache and configure your Redis connection (host, port, password, database, prefix, timeout).
  4. Click Enable Object Cache to install the wp-content/object-cache.php drop-in.

Configuration via wp-config.php

Optional constants that override the settings stored in the database:

define( 'WP_RELAY_HOST',     '127.0.0.1' );
define( 'WP_RELAY_PORT',     6379 );
define( 'WP_RELAY_PASSWORD', 'secret' );
define( 'WP_RELAY_DATABASE', 0 );
define( 'WP_RELAY_PREFIX',   'mysite:' );
define( 'WP_RELAY_TIMEOUT',  1.0 );

Features

  • Full WP_Object_Cache API implementation (add, set, get, delete, incr, decr, multi-key variants, flush, flush_runtime, flush_group).
  • Multisite-aware key namespacing with global and non-persistent group support.
  • Safe fallback: if Relay isn't loaded or the connection fails, WordPress transparently falls back to its default in-memory cache for the request.
  • Admin UI shows extension status, drop-in status, and a live connection test.
  • One-click install / remove of the object-cache.php drop-in and a cache flush button.

How it works

The plugin ships a WordPress object-cache drop-in (dropins/object-cache.php) which is copied to wp-content/object-cache.php when enabled. The drop-in creates a \Relay\Relay client, proxies all wp_cache_* calls through it, and keeps a per-request runtime cache for the lowest possible latency. Relay itself additionally maintains a shared in-process memory cache across requests, so most reads never hit the network at all.

License

GPL-2.0-or-later