[xdebug-general] Re: [Slightly OT] Production Application Metrics

On Tue, 28 Jul 2009, Morgan Tocker wrote:

>  If you have any data on this, I'd be interested to hear it ;)  In a
> perfect world, what I would like to do is to be able to register hooks
> on functions so that I can just start and stop timers:
>
> <?php
>
> function my_callback_function($function_name, [args]) {
>  // Can start and stop timers here.
> }
>
> function my_callback_function_exit($function_name, [args]) {
>  // Can start and stop timers here.
> }
>
> register_callback_function_start('mysql_query', 'my_callback_function');
> register_callback_function_exit('mysql_query', 'my_callback_function_exit');
>
> register_callback_function_start('file', 'my_callback_function');
> register_callback_function_exit('file', 'my_callback_function_exit');
>
> ?>
>
> Reading the Xdebug source, this should be fairly easy to do?

Yes, it's quite easy... however using callbacks makes things slow. It
might better to let the C-extension handle the timer counting as well.
It would probably be better to provide one method to enable a timer for
each function passed in an array or so, and another one to retrieve
statistics.

regards,
Derick

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