empty_loop         0.018
func()             0.016    -0.003
undef_func()       0.016    -0.003
int_func()         0.016    -0.003
$x = self::$x      0.079    0.061
self::$x = 0       0.063    0.045
isset(self::$x)    0.085    0.067
empty(self::$x)    0.087    0.068
$x = Foo::$x       0.049    0.031
Foo::$x = 0        0.034    0.016
isset(Foo::$x)     0.041    0.023
empty(Foo::$x)     0.047    0.029
self::f()          0.017    -0.001
Foo::f()           0.017    -0.001
$x = $this->x      0.037    0.019
$this->x = 0       0.041    0.022
$this->x += 2      0.064    0.046
++$this->x         0.054    0.035
--$this->x         0.054    0.036
$this->x++         0.054    0.036
$this->x--         0.053    0.035
isset($this->x)    0.053    0.035
empty($this->x)    0.055    0.037
$this->f()         0.075    0.057
$x = Foo::TEST     0.055    0.037
new Foo()          0.173    0.155
$x = TEST          0.032    0.013
$x = $_GET         0.061    0.042
$x = $GLOBALS['v'] 0.058    0.040
$x = $hash['v']    0.017    -0.002
$x = $str[0]       0.017    -0.002
$x = $a ?: null    0.016    -0.002
$x = $f ?: tmp     0.016    -0.002
$x = $f ? $f : $a  0.016    -0.002
$x = $f ? $f : tmp 0.016    -0.002
------------------------
Total              1.601