Benchmarker.php

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<?php
require_once( dirname( __FILE__ ) . '/../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 = wfTime();
                        for( $i=0; $i<$count; $i++ ) {
                                call_user_func_array( $bench['function'], $bench['args'] );
                        }
                        $delta = wfTime() - $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;
        }
}