Bytecode Cache Tab Related Topics Performance Overview Use this tab to configure bytecoding caching. To Access From the Performance Admin Panel page, click the Performance tab. Note Using a bytecode cache is highly recommended for production environments -> Ex.: OPcache , APC or XCache . OPcache: "This extension is bundled with PHP 5.5.0 and later, and is » available in PECL for PHP versions 5.2, 5.3 and 5.4. "