empty_loop         0.018
func()             0.016    -0.003
undef_func()       0.015    -0.003
int_func()         0.016    -0.003
$x = self::$x      0.081    0.063
self::$x = 0       0.063    0.045
isset(self::$x)    0.075    0.057
empty(self::$x)    0.079    0.061
$x = Foo::$x       0.045    0.026
Foo::$x = 0        0.031    0.013
isset(Foo::$x)     0.038    0.020
empty(Foo::$x)     0.044    0.025
self::f()          0.016    -0.003
Foo::f()           0.016    -0.003
$x = $this->x      0.035    0.016
$this->x = 0       0.039    0.021
$this->x += 2      0.060    0.042
++$this->x         0.049    0.031
--$this->x         0.050    0.032
$this->x++         0.050    0.031
$this->x--         0.049    0.031
isset($this->x)    0.049    0.031
empty($this->x)    0.052    0.034
$this->f()         0.071    0.052
$x = Foo::TEST     0.052    0.034
new Foo()          0.164    0.145
$x = TEST          0.030    0.011
$x = $_GET         0.056    0.038
$x = $GLOBALS['v'] 0.054    0.035
$x = $hash['v']    0.016    -0.003
$x = $str[0]       0.016    -0.003
$x = $a ?: null    0.016    -0.003
$x = $f ?: tmp     0.016    -0.002
$x = $f ? $f : $a  0.016    -0.003
$x = $f ? $f : tmp 0.016    -0.003
------------------------
Total              1.508