empty_loop         0.054
func()             0.051    -0.004
undef_func()       0.052    -0.002
int_func()         0.050    -0.005
$x = self::$x      0.167    0.112
self::$x = 0       0.130    0.076
isset(self::$x)    0.145    0.090
empty(self::$x)    0.150    0.095
$x = Foo::$x       0.096    0.042
Foo::$x = 0        0.065    0.010
isset(Foo::$x)     0.118    0.063
empty(Foo::$x)     0.090    0.036
self::f()          0.028    -0.026
Foo::f()           0.029    -0.025
$x = $this->x      0.072    0.018
$this->x = 0       0.070    0.015
$this->x += 2      0.103    0.049
++$this->x         0.100    0.046
--$this->x         0.102    0.047
$this->x++         0.099    0.045
$this->x--         0.101    0.046
isset($this->x)    0.088    0.034
empty($this->x)    0.101    0.047
$this->f()         0.141    0.086
$x = Foo::TEST     0.137    0.083
new Foo()          0.319    0.265
$x = TEST          0.061    0.007
$x = $_GET         0.121    0.066
$x = $GLOBALS['v'] 0.114    0.059
$x = $hash['v']    0.029    -0.025
$x = $str[0]       0.028    -0.026
$x = $a ?: null    0.029    -0.025
$x = $f ?: tmp     0.028    -0.026
$x = $f ? $f : $a  0.029    -0.025
$x = $f ? $f : tmp 0.028    -0.026
------------------------
Total              3.126