signature misuse + func_get_args() vs. assert() + count() @ PHP 7.2

assert.php

<?php

function foo(int ...$prices)
{
    assert(count($prices) > 0);
}

$t = microtime(true);

for ($i = 0; $i < 10000000; $i++) {
    foo(1, 2, 3, 4, 5);
}

var_dump(microtime(true) - $t); // float(0.87249183654785)

fn-get-args.php

<?php

function foo(int $price, int ...$prices)
{
    $prices = func_get_args();
}

$t = microtime(true);

for ($i = 0; $i < 10000000; $i++) {
    foo(1, 2, 3, 4, 5);
}

var_dump(microtime(true) - $t); //float(0.99412393569946)

@Majkl578

// assert.php
<?php

function foo(int ...$prices)
{
    assert(count($prices) > 0);
    foreach ($prices as $price) {
        random_int(0, $price);
    }
}

$t = microtime(true);

for ($i = 0; $i < 1000000; $i++) {
    foo(1, 2, 3, 4, 5);
}

var_dump(microtime(true) - $t);

// variadic.php
<?php

function foo(int $price, int ...$prices)
{
    foreach ($prices as $price) {
        random_int(0, $price);
    }
}

$t = microtime(true);

for ($i = 0; $i < 1000000; $i++) {
    foo(1, 2, 3, 4, 5);
}

var_dump(microtime(true) - $t);

$ php -n -dzend.assertions=-1 assert.php                    
float(3.1659638881683)                 
$ php -n variadic.php                                       
float(2.5708408355713)
$ php -v            
PHP 7.1.16 (cli) (built: Mar 28 2018 07:11:55) ( NTS )