empty_loop         0.028
func()             0.029    0.001
undef_func()       0.027    -0.001
int_func()         0.025    -0.002
$x = self::$x      0.153    0.126
self::$x = 0       0.136    0.109
isset(self::$x)    0.147    0.119
empty(self::$x)    0.155    0.127
$x = Foo::$x       0.078    0.051
Foo::$x = 0        0.050    0.023
isset(Foo::$x)     0.053    0.025
empty(Foo::$x)     0.066    0.038
self::f()          0.025    -0.003
Foo::f()           0.025    -0.003
$x = $this->x      0.054    0.027
$this->x = 0       0.057    0.029
$this->x += 2      0.091    0.063
++$this->x         0.070    0.043
--$this->x         0.077    0.050
$this->x++         0.076    0.049
$this->x--         0.077    0.050
isset($this->x)    0.072    0.044
empty($this->x)    0.073    0.046
$this->f()         0.105    0.078
$x = Foo::TEST     0.086    0.058
new Foo()          0.275    0.247
$x = TEST          0.049    0.021
$x = $_GET         0.095    0.068
$x = $GLOBALS['v'] 0.082    0.055
$x = $hash['v']    0.024    -0.004
$x = $str[0]       0.022    -0.005
$x = $a ?: null    0.024    -0.004
$x = $f ?: tmp     0.023    -0.004
$x = $f ? $f : $a  0.023    -0.004
$x = $f ? $f : tmp 0.023    -0.005
------------------------
Total              2.476