What are best practices for optimizing PHP performance in a Symfony2 project?

To optimize PHP performance in a Symfony2 project, it is recommended to use opcode caching, enable gzip compression, minimize the number of database queries, use efficient algorithms, and cache data where possible. 

// Enable opcode caching in php.ini
opcache.enable=1

// Enable gzip compression in .htaccess
<IfModule mod_deflate.c>
    AddOutputFilterByType DEFLATE text/html text/plain text/xml
</IfModule>

// Minimize database queries by using Doctrine's query caching
$em = $this->getDoctrine()->getManager();
$query = $em->createQuery('SELECT p FROM AppBundle:Product p');
$query->useQueryCache(true);

// Use efficient algorithms for data manipulation
function fibonacci($n) {
    if ($n <= 1) {
        return $n;
    }
    return fibonacci($n - 1) + fibonacci($n - 2);
}

// Cache data where possible to reduce database calls
$cache = new \Doctrine\Common\Cache\ArrayCache();
$cache->save('key', 'value');

Keywords

Symfony2 PHP performance optimization caching profiling

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