empty_loop         0.019
func()             0.017    -0.003
undef_func()       0.017    -0.003
int_func()         0.017    -0.003
$x = self::$x      0.088    0.068
self::$x = 0       0.069    0.049
isset(self::$x)    0.082    0.062
empty(self::$x)    0.087    0.068
$x = Foo::$x       0.048    0.029
Foo::$x = 0        0.034    0.015
isset(Foo::$x)     0.041    0.021
empty(Foo::$x)     0.047    0.027
self::f()          0.016    -0.003
Foo::f()           0.017    -0.003
$x = $this->x      0.036    0.017
$this->x = 0       0.040    0.021
$this->x += 2      0.064    0.044
++$this->x         0.052    0.033
--$this->x         0.052    0.033
$this->x++         0.052    0.033
$this->x--         0.051    0.032
isset($this->x)    0.052    0.033
empty($this->x)    0.055    0.036
$this->f()         0.075    0.056
$x = Foo::TEST     0.055    0.035
new Foo()          0.170    0.150
$x = TEST          0.031    0.012
$x = $_GET         0.059    0.040
$x = $GLOBALS['v'] 0.057    0.038
$x = $hash['v']    0.016    -0.003
$x = $str[0]       0.016    -0.003
$x = $a ?: null    0.016    -0.003
$x = $f ?: tmp     0.017    -0.003
$x = $f ? $f : $a  0.016    -0.003
$x = $f ? $f : tmp 0.017    -0.003
------------------------
Total              1.599