Symfony2中的快速ajax响应

Question

I have a tagging text field that while typing in a new tag, suggests similar existing tags. The suggestions are retrieved by an ajax request to a controller which pulls them with from the DB with Doctrine. ie:

• Request /tags/suggestions?q=foo
• Response ["foo","food","fool"]

The problem is that the request is too slow (atleast 2 seconds, in prod ) which in this case is too much.

Is there a way to make the request faster? According to the profiler, the main time consumer is kernel.request with 50% of the total time.

Answer 1

if kernel.request is slow , it's not necessarly a symfony side issue.

you should look to optimize your server by updating your Apache with php-fastPGM instead of php standard module.

you should also activate a cache manager like php APC which reduce a few more the requests .

for example i run a symfony project on a raspberry pi . Before these tweaks , one request with 8 database request took around 25 seconds to display. After these tweaks, a page was displayed in less than 3 seconds ( an average of 2.5 s )

another list of possible tweaks :

http://slides.liip.ch/static/2012-05-18_symfony-speed.html#9

Answer 2

You could ask doctrine(if you're not already doing so) to fetch the result as array(without converting your whole query to a bunch of objects) by using:

$q = $em->createQueryBuilder('t')->(...);
$q -> getQuery() -> fetchArrayResult();

Should speed up things a little.

Answer 3

对于像ajax autocomplete这样的小页面，我决定使用Silex这是一个微型Symfony2，它为我提供了一个优雅而快速的解决方案。