empty_loop         0.020
func()             0.016    -0.004
undef_func()       0.016    -0.004
int_func()         0.016    -0.004
$x = self::$x      0.081    0.062
self::$x = 0       0.064    0.044
isset(self::$x)    0.074    0.054
empty(self::$x)    0.077    0.058
$x = Foo::$x       0.045    0.025
Foo::$x = 0        0.031    0.012
isset(Foo::$x)     0.038    0.018
empty(Foo::$x)     0.044    0.024
self::f()          0.016    -0.004
Foo::f()           0.016    -0.004
$x = $this->x      0.035    0.015
$this->x = 0       0.038    0.019
$this->x += 2      0.061    0.041
++$this->x         0.050    0.030
--$this->x         0.048    0.029
$this->x++         0.049    0.030
$this->x--         0.048    0.029
isset($this->x)    0.049    0.030
empty($this->x)    0.052    0.032
$this->f()         0.071    0.052
$x = Foo::TEST     0.053    0.033
new Foo()          0.165    0.145
$x = TEST          0.030    0.011
$x = $_GET         0.058    0.039
$x = $GLOBALS['v'] 0.054    0.035
$x = $hash['v']    0.016    -0.004
$x = $str[0]       0.016    -0.004
$x = $a ?: null    0.016    -0.004
$x = $f ?: tmp     0.016    -0.004
$x = $f ? $f : $a  0.016    -0.004
$x = $f ? $f : tmp 0.016    -0.004
------------------------
Total              1.509