empty_loop         0.012
func()             0.096    0.084
undef_func()       0.097    0.085
int_func()         0.025    0.012
$x = self::$x      0.069    0.057
self::$x = 0       0.065    0.053
isset(self::$x)    0.072    0.059
empty(self::$x)    0.074    0.062
$x = Foo::$x       0.039    0.027
Foo::$x = 0        0.028    0.016
isset(Foo::$x)     0.040    0.027
empty(Foo::$x)     0.044    0.031
self::f()          0.120    0.107
Foo::f()           0.104    0.092
$x = $this->x      0.029    0.017
$this->x = 0       0.035    0.023
$this->x += 2      0.050    0.038
++$this->x         0.045    0.033
--$this->x         0.046    0.034
$this->x++         0.045    0.033
$this->x--         0.047    0.034
isset($this->x)    0.052    0.040
empty($this->x)    0.053    0.040
$this->f()         0.097    0.085
$x = Foo::TEST     0.045    0.032
new Foo()          0.154    0.142
$x = TEST          0.031    0.018
$x = $_GET         0.049    0.037
$x = $GLOBALS['v'] 0.061    0.048
$x = $hash['v']    0.055    0.043
$x = $str[0]       0.043    0.031
$x = $a ?: null    0.041    0.028
$x = $f ?: tmp     0.044    0.031
$x = $f ? $f : $a  0.037    0.024
$x = $f ? $f : tmp 0.037    0.025
------------------------
Total              1.984