Use Relay to store WordPress translation in PHP runtime memory.

Install as plugin, or Must-Use plugin.

To install the plugin using Composer, add the repository to your composer.json:

{
  "repositories": [
    { "type": "vcs", "url": "[email protected]:cachewerk/relay-wp-l10n.git" }
  ],
}

Then simply run:

composer require cachewerk/relay-wp-l10n

1. If RELAY_L10N_CONFIG is not set, the plugin will do nothing
2. Translations are invalidated using FLUSHDB, be sure to set a dedicated database for translations so it won't flush the regular object cache as well
3. Relay's Table class currently caches data on a per-worker basis, so the cache needs to warm up for all workers in a FPM pool

Add the RELAY_L10N_CONFIG constant to your wp-config.php.

define('RELAY_L10N_CONFIG', [
    'host' => $_SERVER['CACHE_HOST'],
    'port' => $_SERVER['CACHE_PORT'],
    'database' => $_SERVER['CACHE_DB'] + 1,
    'password' => $_SERVER['CACHE_PASSWORD'],
] );