[CONTEST] Tuning PHP Performance

[andr3a]

AUTORE
andr3a

DESCRIZIONE
Test per confrontare le performance i vari metodi più o meno usati per prendere il solo valore da un array popolato in sequenza NON casuale (ed ovviamente prendendo il valore o modificandolo, come fossero veri loops)

CATEGORIA
PERFORMANCE/LOOP

CODICE

<?php
$class = 'ForEachWhileFor';
$iterations = 1000;
$methods = array
(
    '_whileEach'          => 'Test while(list() = each())',
    '_for'                => 'Test for',
    '_forCount'           => 'Test for using count',
    '_forEach'            => 'Test foreach'
);

$dataToTest = array();
for($index = 0; $index < 1000; $index++)
    $dataToTest[] = uniqid(rand(), true);   

class ForEachWhileFor
{
    public static function _whileEach($Iterations, $DataToTest)
    {
        for($duration = 0, $iteration = 0; $iteration < $Iterations; $iteration++)
        {
            $startTime = microtime(true);
            while(list(, $value) = each($DataToTest))$value = ' '.$value;
        reset($DataToTest);
            $duration += microtime(true) - $startTime;
        }
        return $duration;
    }
    public static function _for($Iterations, $DataToTest)
    {
        for($duration = 0, $iteration = 0; $iteration < $Iterations; $iteration++)
        {
            $startTime = microtime(true);
            for($i = 0, $length = count($DataToTest); $i < $length; $i++)$value = ' '.$DataToTest[$i];
            $duration += microtime(true) - $startTime;
        }
        return $duration;
    }
    public static function _forCount($Iterations, $DataToTest)
    {
        for($duration = 0, $iteration = 0; $iteration < $Iterations; $iteration++)
        {
            $startTime = microtime(true);
            for($i = 0; $i < count($DataToTest); $i++)$value = ' '.$DataToTest[$i];
            $duration += microtime(true) - $startTime;
        }
        return $duration;
    }
    public static function _forEach($Iterations, $DataToTest)
    {
        for($duration = 0, $iteration = 0; $iteration < $Iterations; $iteration++)
        {
            $startTime = microtime(true);
        foreach($DataToTest as $value)$value = ' '.$value;
            $duration += microtime(true) - $startTime;
        }
        return $duration;
    }
}
require_once('TimeUnitTesting.php');
?>