View difference between Paste ID: 724v9rBZ and cT0gWuNH

 <?php
 
 const EXECUTION_TIME = 5;
 
 // <preparation>
 $test = new class
 {
     public function exists()
     {
         is_bool(true);
     }
 };
 // </preparation>
 
 $timingStart = microtime(true);
 $memoryStart = memory_get_usage(true);
 $peakStart   = memory_get_peak_usage(true);
 
 for ($iterations = 0; $iterations < PHP_INT_MAX; $iterations++) {
     // <code>
     $test->exists();
     // </code>
 
     // Timing control:
     if ($iterations % 1000 === 0 &&
         microtime(true) - $timingStart >= EXECUTION_TIME) {
         break;
     }
 }
 
 $timingDuration = microtime(true) - $timingStart;
 $memoryEnd      = memory_get_usage(true);
 $memoryUsage    = $memoryEnd - $memoryStart;
 $peakEnd        = memory_get_peak_usage(true);
 $peakUsage      = $peakEnd - $peakStart;
 
 echo "\n\n";
 
 printf("Cycles count   : %s\n", number_format($iterations, 0, '', '.'));
 printf("Cycles by min. : %.2f\n", 60 / $timingDuration * $iterations);
 printf("Total time     : %.2f sec.\n", $timingDuration);
 printf("Memory usage   : %.2f MB (on end) - %.2f MB (on start) = %.2f MB (delta)\n",
     $memoryEnd / 1048576,
     $memoryStart / 1048576,
     $memoryUsage / 1048576);
 printf("Memory peak    : %.2f MB (on end) - %.2f MB (on start) = %.2f MB (delta)\n\n\n",
     $peakEnd / 1048576,
     $peakStart / 1048576,
     $peakUsage / 1048576);