compare type hint performance hit

benchmark.php

<?php

function a1(int $a,int $b) : int {
	return $a + $b;
}


function a2( $a, $b){
	return $a + $b;
}


$f = microtime(true);

for($a = 0; $a<100000; $a++) {
	a1(1, 1);
}

echo microtime(true) - $f;


$f = microtime(true);

for($a = 0; $a<100000; $a++) {
	a2(1, 1);
}
echo '  - without type-hint: ';
echo microtime(true) - $f;