<?php
// Проверка скорости исполнения вызовов статических, методов и простых функций для php7.3-fpm:

/** simple function */
function someTest(int $i): int
{
    return $i+10;
}

class Some {
    public static function statTest(int $i): int
    {
        return $i+10;
    }

    public function dynTest(int $i): int
    {
        return $i+10;
    }
}

$objSome = new Some();
$i = 0;
$res = 0;
$num = 100;
$repeat = 1000*1000;
$sum = [];

ob_start();
do {
    $start = microtime(true);
    for ($i = 0; $i < $repeat; $i++) {
        $res = $i+10;
    }
    $start = round((microtime(true) - $start)*1000, 3);
    echo $res;
    $sum['clear'][] = $start;

    $start = microtime(true);
    for ($i = 0; $i < $repeat; $i++) {
        $res = someTest($i);
    }
    $start = round((microtime(true) - $start)*1000, 3);
    echo $res;
    $sum['function'][] = $start;

    $start = microtime(true);
    for ($i = 0; $i < $repeat; $i++) {
        $res = Some::statTest($i);
    }
    $start = round((microtime(true) - $start)*1000, 3);
    echo $res;
    $sum['static'][] = $start;

    $start = microtime(true);
    for ($i = 0; $i < $repeat; $i++) {
        $res = $objSome->dynTest($i);
    }
    $start = round((microtime(true) - $start)*1000, 3);
    echo $res;
    $sum['method'][] = $start;
} while( --$num > 0 );
ob_clean();

$num = 100;
$clear = $func = $stat = $dyn = 0.0;
for($i=0; $i<$num; $i++){
    $clear += $sum['clear'][$i];
    $func  += $sum['function'][$i];
    $stat  += $sum['static'][$i];
    $dyn   += $sum['method'][$i];
}
// calc average time for 1 in nano seconds:
$multiplier = 1000*1000/$num/$repeat;
$clear = round($clear*$multiplier, 2);
$func  = round($func*$multiplier, 2);
$stat  = round($stat*$multiplier, 2);
$dyn   = round($dyn*$multiplier, 2);

echo "\n<br><br>avg time: clear={$clear} ns, func={$func} ns, stat={$stat} ns, method={$dyn} ns."
  , "\n<br>static/func=", round(($stat-$clear)/($func-$clear)*100 - 100, 1), '%'
  , "\n<br>method/func=", round(($dyn-$clear)/($func-$clear)*100 - 100, 1), '%'
;