WordPress - Speed up performance: Disable post revisions. Set autosave interval. Set trash days. Increasing public memory. Increasing the administrative memory. WordPress cron timeout.

wp-config.php

<?php
/**
 * File: wp-config.php
 * 
 * 1. Disable post revisions
 * 2. Set autosave interval
 * 3. Set trash days
 * 4. Increasing public memory
 * 5. Increasing the administrative memory
 * 6. WordPress cron timeout
 * 
 */

/** wp-config.php / Disable post revisions */
define( 'WP_POST_REVISIONS', false );

/** wp-config.php / Set autosave interval */
define( 'AUTOSAVE_INTERVAL', 300 ); // Seconds

/** wp-config.php / Set trash days */
define( 'EMPTY_TRASH_DAYS', 3 ); // Days
define( 'MEDIA_TRASH', false );

/** wp-config.php / Increasing public memory */
define( 'WP_MEMORY_LIMIT', '256M' ); // MB

/** wp-config.php / Increasing the administrative memory */
define( 'WP_MAX_MEMORY_LIMIT', '512M' ); // MB

/** wp-config.php / WordPress cron timeout */
define( 'WP_CRON_LOCK_TIMEOUT', 60 ); // Seconds