empty_loop         0.038
func()             0.027    -0.011
undef_func()       0.022    -0.015
int_func()         0.021    -0.017
$x = self::$x      0.129    0.091
self::$x = 0       0.138    0.101
isset(self::$x)    0.195    0.157
empty(self::$x)    0.135    0.097
$x = Foo::$x       0.141    0.103
Foo::$x = 0        0.097    0.060
isset(Foo::$x)     0.087    0.049
empty(Foo::$x)     0.106    0.069
self::f()          0.041    0.003
Foo::f()           0.043    0.005
$x = $this->x      0.112    0.074
$this->x = 0       0.102    0.065
$this->x += 2      0.100    0.062
++$this->x         0.081    0.044
--$this->x         0.082    0.045
$this->x++         0.119    0.081
$this->x--         0.089    0.051
isset($this->x)    0.069    0.031
empty($this->x)    0.068    0.031
$this->f()         0.110    0.073
$x = Foo::TEST     0.073    0.036
new Foo()          0.276    0.238
$x = TEST          0.054    0.016
$x = $_GET         0.092    0.054
$x = $GLOBALS['v'] 0.087    0.050
$x = $hash['v']    0.025    -0.013
$x = $str[0]       0.020    -0.017
$x = $a ?: null    0.021    -0.016
$x = $f ?: tmp     0.023    -0.015
$x = $f ? $f : $a  0.022    -0.015
$x = $f ? $f : tmp 0.024    -0.014
------------------------
Total              2.868