Microbenchmark for typed property vs. setter

property-bench.php

<?php

// Compares the performance of a trivial typehinted setter with a public typed property

define('ITERATIONS', 1_000_000);
ini_set('memory_limit', '384M');

$arrays = [];

echo "Building data...";

for ($i = 0; $i < ITERATIONS; $i++) {
    $arr = [];
    for ($j = 0, $max = random_int(0, 5); $j < $max; $j++) {
        $arr[] = random_int(1, 10);
    }
    $arrays[] = $arr;
}

echo "done\n";

class WithSetter
{
    protected $data;

    public function set(array $data) { $this->data = $data; }
}

class WithProperty
{
    public array $data;
}

$withSetter = new WithSetter();
$withProperty = new WithProperty();

$withSetterStart = microtime(true);
for ($i = 0; $i < ITERATIONS; $i++) {
    $withSetter->set($arrays[$i]);
}
echo "With setter: " . (microtime(true) - $withSetterStart) . "\n";

$withPropertyStart = microtime(true);
for ($i = 0; $i < ITERATIONS; $i++) {
    $withProperty->data = $arrays[$i];
}
echo "With property: " . (microtime(true) - $withPropertyStart) . "\n";