empty_loop         0.019
func()             0.016    -0.003
undef_func()       0.016    -0.003
int_func()         0.015    -0.003
$x = self::$x      0.082    0.064
self::$x = 0       0.063    0.045
isset(self::$x)    0.074    0.055
empty(self::$x)    0.077    0.059
$x = Foo::$x       0.045    0.027
Foo::$x = 0        0.032    0.013
isset(Foo::$x)     0.038    0.019
empty(Foo::$x)     0.044    0.025
self::f()          0.016    -0.003
Foo::f()           0.016    -0.003
$x = $this->x      0.034    0.016
$this->x = 0       0.039    0.020
$this->x += 2      0.060    0.042
++$this->x         0.049    0.031
--$this->x         0.049    0.031
$this->x++         0.050    0.032
$this->x--         0.048    0.029
isset($this->x)    0.049    0.031
empty($this->x)    0.052    0.033
$this->f()         0.071    0.052
$x = Foo::TEST     0.052    0.033
new Foo()          0.165    0.147
$x = TEST          0.030    0.012
$x = $_GET         0.057    0.039
$x = $GLOBALS['v'] 0.055    0.037
$x = $hash['v']    0.016    -0.003
$x = $str[0]       0.016    -0.003
$x = $a ?: null    0.016    -0.002
$x = $f ?: tmp     0.017    -0.002
$x = $f ? $f : $a  0.017    -0.002
$x = $f ? $f : tmp 0.016    -0.002
------------------------
Total              1.512