PHP Performance Benchmarks

Güzel bir inceleme yapılmış , 5.2.13 kullanılan bir server'da.
Sizlerde bu tarz bir test yaptıysanız, gözlemlerinizi paylaşabilirsiniz diye düşünüyorum.

http://maettig.com/code/php/php-perf...benchmarks.php

kodların hepsi aynı işlevi görüyor
$x e array den random bir değer çekiyor

<?php
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $starttime = $mtime;
	
	$arr=array(1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5);
	
	for($i=0;$i<100000;$i++)
	{
	$r = array_rand($arr, 1);
	$x = $arr[$r];
	}
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $endtime = $mtime; 
    $totaltime = ($endtime - $starttime); 
    echo "This page was created in ".$totaltime." seconds";
?>

sonuçları :
This page was created in 0.75107789039612 seconds
This page was created in 0.68803882598877 seconds
This page was created in 0.74670791625977 seconds

<?php
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $starttime = $mtime;
	
	$arr=array(1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5);
	for($i=0;$i<100000;$i++)
	{
	shuffle($arr);
	$x=$arr[0];
	}
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $endtime = $mtime; 
    $totaltime = ($endtime - $starttime); 
    echo "This page was created in ".$totaltime." seconds";
?>

This page was created in 1.9798591136932 seconds
This page was created in 1.9784121513367 seconds
This page was created in 1.9895648956299 seconds

<?php
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $starttime = $mtime;
	
	$arr=array(1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5);
	$array_count=count($arr);
	$array_count--;
	for($i=0;$i<100000;$i++)
	{
	$x=$arr[rand(0,$array_count)];
	}
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $endtime = $mtime; 
    $totaltime = ($endtime - $starttime); 
    echo "This page was created in ".$totaltime." seconds";
?>

This page was created in 0.10634994506836 seconds
This page was created in 0.10996508598328 seconds
This page was created in 0.10419893264771 seconds

array count dinamik şekilde >

<?php
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $starttime = $mtime;
	
	$arr=array(1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5,1,2,3,4,5);
	for($i=0;$i<100000;$i++)
	{
	$x=$arr[rand(0,count($arr)-1)];
	}
    $mtime = microtime(); 
    $mtime = explode(" ",$mtime); 
    $mtime = $mtime[1] + $mtime[0]; 
    $endtime = $mtime; 
    $totaltime = ($endtime - $starttime); 
    echo "This page was created in ".$totaltime." seconds";
?>

This page was created in 0.17230296134949 seconds
This page was created in 0.17613315582275 seconds
This page was created in 0.17019081115723 seconds

'contains no dollar signs' 1 ms 109
"contains no dollar signs" 1 ms 100

ben burasını anlamadım tek tırnak içerisinde değişken aramıyor düz string olarak ele alıyor tepkime süresi niye biraz fazla olmuş çift tırnak içinde değişken araması gerekmiyor mu ? bununda tepkime süresine yansıması gerekir diye düşünüyorum sallama sonuçlar olmasın