empty_loop         0.018
func()             0.016    -0.002
undef_func()       0.016    -0.002
int_func()         0.016    -0.002
$x = self::$x      0.080    0.062
self::$x = 0       0.063    0.045
isset(self::$x)    0.074    0.056
empty(self::$x)    0.080    0.062
$x = Foo::$x       0.045    0.027
Foo::$x = 0        0.032    0.014
isset(Foo::$x)     0.038    0.020
empty(Foo::$x)     0.044    0.026
self::f()          0.016    -0.002
Foo::f()           0.016    -0.001
$x = $this->x      0.037    0.020
$this->x = 0       0.041    0.023
$this->x += 2      0.063    0.045
++$this->x         0.054    0.036
--$this->x         0.057    0.039
$this->x++         0.053    0.035
$this->x--         0.056    0.039
isset($this->x)    0.053    0.036
empty($this->x)    0.056    0.038
$this->f()         0.075    0.058
$x = Foo::TEST     0.055    0.037
new Foo()          0.169    0.151
$x = TEST          0.031    0.013
$x = $_GET         0.060    0.042
$x = $GLOBALS['v'] 0.056    0.038
$x = $hash['v']    0.016    -0.002
$x = $str[0]       0.016    -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              1.562