empty_loop         0.018
func()             0.016    -0.002
undef_func()       0.016    -0.002
int_func()         0.016    -0.002
$x = self::$x      0.082    0.064
self::$x = 0       0.065    0.047
isset(self::$x)    0.078    0.060
empty(self::$x)    0.082    0.064
$x = Foo::$x       0.047    0.029
Foo::$x = 0        0.037    0.019
isset(Foo::$x)     0.041    0.023
empty(Foo::$x)     0.046    0.028
self::f()          0.016    -0.002
Foo::f()           0.016    -0.002
$x = $this->x      0.036    0.018
$this->x = 0       0.040    0.022
$this->x += 2      0.063    0.045
++$this->x         0.051    0.033
--$this->x         0.050    0.031
$this->x++         0.049    0.031
$this->x--         0.048    0.030
isset($this->x)    0.049    0.031
empty($this->x)    0.053    0.035
$this->f()         0.073    0.054
$x = Foo::TEST     0.052    0.034
new Foo()          0.161    0.143
$x = TEST          0.029    0.011
$x = $_GET         0.057    0.039
$x = $GLOBALS['v'] 0.055    0.037
$x = $hash['v']    0.016    -0.003
$x = $str[0]       0.015    -0.003
$x = $a ?: null    0.016    -0.002
$x = $f ?: tmp     0.015    -0.003
$x = $f ? $f : $a  0.016    -0.002
$x = $f ? $f : tmp 0.016    -0.002
------------------------
Total              1.536