hywan/bench

The Hoa\Bench library.

Hoa is a modular, extensible and structured set of PHP libraries. Moreover, Hoa aims at being a bridge between industrial and research worlds.

Hoa\Bench

This library allows to analyze performance of algorithms or programs by placing some “marks” in the code. Furthermore, this library proposes some DTrace programs.

Quick usage

We propose a quick overview of two usages: the library itself and one DTrace program.

Benchmark

All we have to do is to place different marks in the code. A mark can be started, paused, stopped and reset. The class Hoa\Bench\Bench proposes a quick statistic graph that could be helpful:

$bench = new Hoa\Bench\Bench();

// Start two marks: “one” and “two”.
$bench->one->start();
$bench->two->start();

usleep(50000);

// Stop the mark “two” and start the mark “three”.
$bench->two->stop();
$bench->three->start();

usleep(25000);

// Stop all marks.
$bench->three->stop();
$bench->one->stop();

// Print statistics.
echo $bench;

/**
 * Will output:
 *     one    ||||||||||||||||||||||||||||||||||||||||||||||    77ms, 100.0%
 *     two    ||||||||||||||||||||||||||||||                    51ms,  66.0%
 *     three  |||||||                                           11ms,  14.4%
 */

More operations are available, such as iterating over all marks, deleting a mark, filters marks etc.

DTrace

An interesting DTrace program is hoa://Library/Bench/Dtrace/Execution.d that shows the call trace, errors and exceptions during an execution. For example, if we consider the Dtrace.php file that contains the following code:

<?php

function f ( ) { g(); h(); }
function g ( ) { h();      }
function h ( ) {           }

f();

Then, we can run DTrace like this:

$ exed=`hoa core:resolve hoa://Library/Bench/Dtrace/Execution.d --no-verbose`
$ sudo $exed -c "php Dtrace.php"
Request start
     2ms ➜ f()        …/Dtrace.php:007
    37ms   ➜ g()      …/Dtrace.php:003
    26ms     ➜ h()    …/Dtrace.php:004
    28ms     ← h()
    37ms   ← g()
    44ms   ➜ h()      …/Dtrace.php:003
    25ms   ← h()
    30ms ← f()
Request end

Another program shows statistics about an execution: each function that has been called, how many times, how long the execution has taken etc.

Documentation

Different documentations can be found on the website: http://hoa-project.net/.

License

Hoa is under the New BSD License (BSD-3-Clause). Please, see LICENSE.