empty_loop         0.019
func()             0.016    -0.003
undef_func()       0.016    -0.003
int_func()         0.016    -0.003
$x = self::$x      0.081    0.062
self::$x = 0       0.063    0.044
isset(self::$x)    0.076    0.057
empty(self::$x)    0.081    0.062
$x = Foo::$x       0.045    0.026
Foo::$x = 0        0.032    0.012
isset(Foo::$x)     0.038    0.019
empty(Foo::$x)     0.044    0.025
self::f()          0.016    -0.004
Foo::f()           0.016    -0.004
$x = $this->x      0.034    0.015
$this->x = 0       0.039    0.020
$this->x += 2      0.061    0.042
++$this->x         0.050    0.031
--$this->x         0.049    0.030
$this->x++         0.050    0.031
$this->x--         0.048    0.029
isset($this->x)    0.050    0.030
empty($this->x)    0.052    0.033
$this->f()         0.071    0.052
$x = Foo::TEST     0.053    0.033
new Foo()          0.172    0.153
$x = TEST          0.033    0.014
$x = $_GET         0.063    0.044
$x = $GLOBALS['v'] 0.059    0.040
$x = $hash['v']    0.017    -0.002
$x = $str[0]       0.017    -0.002
$x = $a ?: null    0.017    -0.002
$x = $f ?: tmp     0.017    -0.002
$x = $f ? $f : $a  0.017    -0.002
$x = $f ? $f : tmp 0.017    -0.002
------------------------
Total              1.542