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::$x = 0       0.064    0.046
isset(self::$x)    0.075    0.057
empty(self::$x)    0.079    0.061
$x = Foo::$x       0.045    0.027
Foo::$x = 0        0.031    0.013
isset(Foo::$x)     0.038    0.020
empty(Foo::$x)     0.044    0.026
self::f()          0.016    -0.002
Foo::f()           0.016    -0.002
$x = $this->x      0.035    0.017
$this->x = 0       0.038    0.020
$this->x += 2      0.060    0.042
++$this->x         0.049    0.031
--$this->x         0.048    0.030
$this->x++         0.050    0.032
$this->x--         0.048    0.030
isset($this->x)    0.049    0.031
empty($this->x)    0.052    0.034
$this->f()         0.071    0.053
$x = Foo::TEST     0.052    0.034
new Foo()          0.159    0.141
$x = TEST          0.030    0.012
$x = $_GET         0.059    0.041
$x = $GLOBALS['v'] 0.055    0.037
$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 0.017    -0.001
------------------------
Total              1.505