Remi's RPM repository - Blog

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1. Le vendredi 2 mars 2012, 19:58 par Remi

RPM are also available in remi repository for PHP 5.3.10.

2. Le samedi 3 mars 2012, 10:37 par Remi

Submitted for review : Review request #799597

3. Le samedi 3 mars 2012, 11:08 par Remi

Some time ago (yes, i know, more than 4 years), I wrote an article about Profiling PHP (in french) using xDebug.

This solution still works perfectly.

Advantages of xDebug:

• no code change
• use standard data format
• choice for data analysis tool

Drawbacks:

• need to alter apache configuration for data collect
• need to run apache in single process mode

So, I took some time to analyze some GLPI code using XHProf.

Finally, this tools is quite practical, with different features than xDebug.

Advantages of XHProf:

• could analyze only a part of the code
• no need to alter apache configuration
• integrated analysis tool running in web mode

Drawbacks:

• need to alter the code to analyze
• no choice of the analysis tool

I quickly wrote a small XHProf class for GLPI, so, to analyze a part of code, we just need to add:

$profiler = new XHProf("An optionnal message");
...
$profiler->stop();

And we get, in the application log, the link to the analyse result, p.e.:

02-03-2012 14:10 Stop profiling with XHProf, result URL http://foo/xhprof/index.php?run=4f50c6c5988b2&source=glpi

I took this opportunity to check the connection code (too long, for me, in large configuration) and quickly found a little optimization for the rules engine.

Then, I check the gettext performance impact, and conclude (we had 0,12" more to load each page) that we need to implement a memory cache for the locale file, after it have been parsed. Quick solution implemented for test (reducing the overload to 0,01").

So, I'm quite happy of this tool.