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145.2 ms | 1399 KiB | 7 Q<?hh
$string = "";
$newstring = "";
for ($i=0;$i<10240;$i++) {
echo "Iteration $i\n";
$string .= 'x';
$newstring = $string;
$newstring = preg_replace("/(x)+/","",$newstring);
echo "$string - $newstring \n";
}