PHP: Function execution time for debugging

Question

Possible Duplicate:
Simplest way to profile a PHP script

Sometimes my website loads slowly and I would like to trace which function causes it. (or if it is related to me or the webserver) How can I get execution times of each function that is being run?

Like;

<?php
function A() { }
function B() { }
function C() { }
A();
B();

Trace();
?>

Trace() would output: A ran in 0,1 miliseconds, B ran in 1,1 seconds, script completed. Is there any debugging feature like this in PHP?

Ps. I'm not speaking about applying microtime for each function.

you can use a profiling tool like the one xdebug offers [xdebug profiler documentation](http://xdebug.org/docs/profiler) — r3bel, Aug 13 '12 at 23:59

score 9 · Accepted Answer · edited May 23 '17 at 12:25

9

Use:

XHProf if you need to profile in production environments. It has a footprint, but it's usually affordable. It does not produce trace if the script ends unexpectedly though.

XDebug if you want to profile in development and testing environments. It's generally more reliable, but has a noticeable footprint; long running scripts will generate very large (100s MBs) files for instance, as opposed to XHProf.

Don't use:

APD, because even though it's recommended in this answer, it's very outdated and doesn't look like it's being developed anymore (last release in 2004 according to its PECL page)

PS: My personal recommendation: Play with them all if you have the time to do so, or just set up xdebug in your dev environment otherwise.

edited May 23 '17 at 12:25

Community

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answered Aug 14 '12 at 00:14

Mahn

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Thanks for the reply, I'm going to select it as the answer soon, but my question was about the production environment. It's typical linux hosting server that I have no access. Their MySQL server may have problems which causes the slow load, but in my development environment, I'm using my own MySQL server, so in the end I wouldn't be able to find the source of problems. There is no other basic alternatives to the ones you mentioned above? – Aristona Aug 14 '12 at 00:32
Hm not really, this kind of debugging can only be performed installing extensions to PHP; if you have no root access to the server the only thing you can do is relying on microtime benchmarks :/ – Mahn Aug 14 '12 at 00:36
Okay mate, guess I'll order a VPS or similar - would need it for my node server anyway. :p Thanks alot once again. – Aristona Aug 14 '12 at 00:39
A more up to date link for XHProf is: https://pecl.php.net/package/xhprof – cgaldiolo May 11 '21 at 16:56

score 0 · Answer 2 · answered Aug 13 '12 at 23:59

0

Take a look at http://xdebug.org/docs/profiler

answered Aug 13 '12 at 23:59

Terence Johnson

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score 0 · Answer 3 · answered Aug 13 '12 at 23:59

I wouldn't do this on your production site, but if you can replicate the problem in a test setting, use profiling to determine where you are spending all your execution time. You'll need to install XDebug or equivalent. http://xdebug.org/docs/profiler

PHP: Function execution time for debugging

3 Answers3