Question

Im developing a front end for a site where performance is very important. Rapid development was also key, so I made the decision to go with symfony2 and to use the Doctrine2 ORM.

When I request a simple page from symfony (without DB request) it responds in ~200ms. As soon as I request anything from the DB through Doctrine it jumps up to ~1300ms.

I appreciate there is time to hydrade the records, but this is with me hydrating to array.

Heres the controller code. The template just outputs the array count.

$repository = $this->getDoctrine()->getManager()->getRepository('AcmeProductBundle:Product');
    $qb = $repository->createQueryBuilder('g');
    $qb->addOrderBy('g.id', 'DESC');

    $ret = null;
    $query = $qb->getQuery();
    //$query->useResultCache(true, 3600);
    $ret = $query->getArrayResult();
    return $this->render('AcmeCatalogBundle::test.html.twig', array('id' => count($ret)));

Looking at the Timline in symfony profiler toolbar, the contoller is taking ~1000ms and doctrine is taking ~1ms. But if i comment out the getResults() line the controller jumps down to ~45ms.

Is this normal? What can I do about this?

UPDATE
I ran the following test and it shows that the first query is where all the time is lost:

$ret = array();
    $start = microtime(true);
    for ($i = 1; $i <= 10; $i++) {
        $time_start = microtime(true);

        $query = $em->createQuery('SELECT p FROM AcmeProductBundle:Product p WHERE p.id = 1');
        $products = $query->getResult();

        $time_end = microtime(true);
        $ret[$i] = $time_end - $time_start;
    }
    $end = microtime(true);
    $ret['Total'] = $end - $start;

    return $this->render('AcmeCatalogBundle::test.html.twig', array('ret' => $ret));

And the results:

1. 1.0216779708862
2. 0.00091791152954102
3. 0.00082588195800781
4. 0.00081419944763184
5. 0.00081706047058105
6. 0.00081610679626465
7. 0.00081491470336914
8. 0.00081706047058105
9. 0.00043296813964844
10. 0.0004270076751709

Total – 1.0283808708191

Could it be that the db connection or entity manager isnt being pooled perhaps?

Answer 1

So as you guys suggested, it turned out to be my environment. Namely, that I was using ‘localhost’ as the database_host in symfony. Changing it to ‘127.0.0.1’ made all the difference. Im now running queries suitably fast.

Thanks for your comments people.

http://www.bluetopazgames.com/uncategorized/php-mysql_connect-is-slow-1-second-for-localhost-windows-7/