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run code in 300+ PHP versions simultaneously

@ 2018-05-21T01:30:40Z

<?php

$n = 10000000;                                                                   
                                                                                 
$t = -microtime(true);                                                           
$j = 0;                                                                          
$k = 0;                                                                          
for ($i = 0; $i < $n; $i++) {                                                    
    $j++;                                                                        
    $k += 1;                                                                     
}                                                                                
printf("%.2f\n", $t + microtime(true));                                          
                                                                                 
$t = -microtime(true);                                                           
$a = [];                                                                         
$j = 0;                                                                          
$k = 0;                                                                          
for ($i = 0; $i < $n; $i++) {                                                    
    $j++;                                                                        
    $k += ($a[$i] ?? 1);                                                         
}                                                                                
printf("%.2f\n", $t + microtime(true));

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microtime: documentation ( source)
printf: documentation ( source)

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