Bench function, just bench('flagname '.__LINE__) to set a flag, and bench() to get bench datas.

bench.php

<?php #-*- coding:utf-8 -*-
# function bench()

/**
*
* @param string $label flag to markup your bench step
* @return mixed
* @example
    bench('big ass code N#1 @ '.__LINE__);
    // some code..
    bench('Another stupid test @ '.__LINE__);
    // some code..
    print_r(bench()); // => results
*
*/
function bench($label='nolabel')
{
    static $stack=null;
    static $start=null;
    if(is_null($stack)) $stack = array();
    list($u, $s) = explode(" ", microtime());
    $utime = ((float)$u + (float)$s);
    if(isset($stack[0])) $delta = $utime - $stack[count($stack)-1]['utime'];
    else $delta = 0;
    $total = (!isset($stack[0])) ? 0
                                 : ($utime - $stack[0]['utime']);
    $stack[] = array( 'flag' => (string)$label,
                      'utime' => $utime,
                      'delta' => '+'.round($delta,5).'s',
                      'total' => round($total,5).'s',
                      'memory' => function_exists('memory_get_usage') ? memory_get_usage() : 0 );
    return $stack;
}
//- bench()