PHP Cookbook

8.25. Profiling Code

Problem

You have a block of code and you want to profile it to see how long each statement takes to execute.

Solution

Use the PEAR Benchmark module:

require 'Benchmark/Timer.php';

$timer =& new Benchmark_Timer(true);

$timer->start();
// some setup code here
$timer->setMarker('setup');
// some more code executed here
$timer->setMarker('middle');
// even yet still more code here
$timer->setmarker('done');
// and a last bit of code here
$timer->stop();

$timer->display();

Discussion

Calling setMarker( ) records the time. The display( ) method prints out a list of markers, the time they were set, and the elapsed time from the previous marker:

-------------------------------------------------------------
marker    time index            ex time               perct
-------------------------------------------------------------
Start     1029433375.42507400   -                       0.00%
-------------------------------------------------------------
setup     1029433375.42554800   0.00047397613525391    29.77%
-------------------------------------------------------------
middle    1029433375.42568700   0.00013899803161621     8.73%
-------------------------------------------------------------
done      1029433375.42582000   0.00013303756713867     8.36%
-------------------------------------------------------------
Stop      1029433375.42666600   0.00084602832794189    53.14%
-------------------------------------------------------------
total     -                     0.0015920400619507    100.00%
-------------------------------------------------------------

The Benchmark module also includes ...