Benchmarker.php

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<?php
require_once __DIR__ . '/../Maintenance.php';

abstract class Benchmarker extends Maintenance {
    private $results;

    public function __construct() {
        parent::__construct();
        $this->addOption( 'count', "How many time to run a benchmark", false, true );
    }

    public function bench( array $benchs ) {
        $bench_number = 0;
        $count = $this->getOption( 'count', 100 );

        foreach( $benchs as $bench ) {
            // handle empty args
            if( !array_key_exists( 'args', $bench ) ) {
                $bench['args'] = array();
            }

            $bench_number++;
            $start = microtime( true );
            for( $i = 0; $i < $count; $i++ ) {
                call_user_func_array( $bench['function'], $bench['args'] );
            }
            $delta = microtime( true ) - $start;

            // function passed as a callback
            if( is_array( $bench['function'] ) ) {
                $ret = get_class( $bench['function'][0] ) . '->' . $bench['function'][1];
                $bench['function'] = $ret;
            }

            $this->results[$bench_number] = array(
                'function'  => $bench['function'],
                'arguments' => $bench['args'],
                'count'     => $count,
                'delta'     => $delta,
                'average'   => $delta / $count,
                );
        }
    }

    public function getFormattedResults() {
        $ret = '';
        foreach( $this->results as $res ) {
            // show function with args
            $ret .= sprintf( "%s times: function %s(%s) :\n",
                $res['count'],
                $res['function'],
                join( ', ', $res['arguments'] )
            );
            $ret .= sprintf( "   %6.2fms (%6.2fms each)\n",
                $res['delta'] * 1000,
                $res['average'] * 1000
            );
        }
        return $ret;
    }
}