Использование тернарного оператора ?: с подавлением ошибки?

$startTime = microtime(true);
for ($i = 0; $i <= 10000; $i++)
{
	(isset($_GET['aaa']) && $_GET['aaa'] == 'abc');
}
print number_format(microtime(true) - $startTime, 10) . "\r\n";
// 0.0010221004 секунд


$startTime = microtime(true);
for ($i = 0; $i <= 10000; $i++)
{
	(@$_GET['aaa'] == 'abc');
}
print number_format(microtime(true) - $startTime, 10) . "\r\n";
// 0.0060720444 секунд

$_GET['aaa'] = 'abc';

$startTime = microtime(true);
for ($i = 0; $i <= 10000; $i++)
{
	(isset($_GET['aaa']) && $_GET['aaa'] == 'abc');
}
print number_format(microtime(true) - $startTime, 10) . "\r\n";
// 0.0012769699 секунд


$startTime = microtime(true);
for ($i = 0; $i <= 10000; $i++)
{
	(@$_GET['aaa'] == 'abc');
}
print number_format(microtime(true) - $startTime, 10) . "\r\n";
// 0.0018811226 секунд

<?php

ini_set('memory_limit', '512M');
error_reporting(E_ALL);
class test {
    static $current;
    static $emits;
    static $times = [];
    static function start($n){
        self::$current = $n;
        self::$emits[$n]=[];
        self::$times[$n] = microtime(1);
    }
    static function stop($n){
        self::$times[$n] = microtime(1)-self::$times[$n];
    }
    static function emit($v){
        @self::$emits[self::$current][(int)!!$v]+=1;
    }
}
class magic
{
    protected $p = [];
    function __get($name)
    {
        return $this->p[$name];
    }
    function __set($name, $value)
    {
        $this->p[$name] = $value;
    }
    function __isset($name)
    {
        return isset($this->p[$name]);
    }
    function __unset($name)
    {
        unset($this->p[$name]);
    }
}
$len = 1000000;
$Object = new magic();
$Array = [];
for ($i = 0; $i < $len; $i++) {
    if($i%3){
        $Object->{'p' . $i} = $i;
        $Array[$i] = $i;
    }
}

//normal section
$test = 'normalWithObject';
test::start($test);
for ($i = 0; $i < $len; $i++) {
    $n = 'p' . $i;
    test::emit(!empty($Object->{$n}) ? $Object->{$n} : false);
}
test::stop($test);

$test = 'normalWithArray';
test::start($test);
for ($i = 0; $i < $len; $i++) {
    test::emit(!empty($Array[$i]) ? $Array[$i] : false);
}
test::stop($test);

//abnormal section

$test = 'abnormalWithObject';
test::start($test);
for ($i = 0; $i < $len; $i++) {
    test::emit(@$Object->{'p' . $i} ? : false);
}
test::stop($test);

$test = 'abnormalWithArray';
test::start($test);
for ($i = 0; $i < $len; $i++) {
    test::emit(@$Array[$i] ? : false);
}
test::stop($test);

print_r(test::$times);

Array
(
    [normalWithObject] => 1.6597728729248
    [normalWithArray] => 0.46078515052795
    [abnormalWithObject] => 1.5833020210266
    [abnormalWithArray] => 0.70977306365967
)