src/Php73/Php73.php
public static function hrtime($asNum = false)
    {
        $ns = \microtime(false);
        $s = \substr($ns, 11) - self::$startAt;
        $ns = 1E9 * (float) $ns;

        if ($asNum) {
            $ns += $s * 1E9;

            return \PHP_INT_SIZE === 4 ? $ns : (int) $ns;
        }

        return array($s, (int) $ns);
    }
public static function hrtime($asNum = false)
    {
        $ns = \microtime(false);
        $s = \substr($ns, 11) - self::$startAt;
        $ns = 1E9 * (float) $ns;

        if ($asNum) {
            $ns += $s * 1E9;

            return \PHP_INT_SIZE === 4 ? $ns : (int) $ns;
        }

        return array($s, (int) $ns);
    }
@param bool $asNum

@return array|float|int