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Detailed explanation of the comparison between static delayed binding and ordinary static efficiency in PHP
Detailed explanation of the comparison between static delayed binding and ordinary static efficiency in PHP
Comparison of PHP static delayed binding and ordinary static efficiency
It’s just a simple experiment, comparing the efficiency of delayed binding and non-delayed
Delayed binding mainly uses the static keyword to replace the original self, but the function is very powerful
Experimental code:
class A {
protected static $cc1 = array('a1', 'b', 'c', 'd');
protected static $cc2 = array('a2', 'b', 'c', 'd');
protected static $cc3 = array('a3', 'b', 'c', 'd');
protected static $cc4 = array('a4', 'b', 'c', 'd');
protected static $cc5 = array('a5', 'b', 'c', 'd');
public static function n1() {
return static::$cc1;
}
public static function n2() {
return static::$cc2;
}
public static function n3() {
return static::$cc3;
}
public static function n4() {
return static::$cc4;
}
public static function n5() {
return static::$cc5;
}
}
class C extends A {
}
class B {
protected static $cc1 = array('a1', 'b', 'c', 'd');
protected static $cc2 = array('a2', 'b', 'c', 'd');
protected static $cc3 = array('a3', 'b', 'c', 'd');
protected static $cc4 = array('a4', 'b', 'c', 'd');
protected static $cc5 = array('a5', 'b', 'c', 'd');
public static function n1() {
return self::$cc1;
}
public static function n2() {
return self::$cc2;
}
public static function n3() {
return self::$cc3;
}
public static function n4() {
return self::$cc4;
}
public static function n5() {
return self::$cc5;
}
}There are three classes A, B, and C above, all of which are static member variables and methods. Among them,
A class uses static delay,
B class is non-delay,
Class C inherits class A and implements delayed binding of static member variables and methods.
I won’t go into details about the process. The environment is PHP5.4.27. Directly upload the test results:
There are two situations,
1. When there are only A and B class (that is, no class is allowed to inherit class A), there is almost no difference in efficiency
2. When class A is inherited by class C, the performance of class A using static delayed binding It will be slightly worse than class B (as long as class A has inherited classes, it will be slower)
Loops 100,000 times, and the time difference between 2.8s ~ 3.2s is about 0.3 seconds. It should be negligible
Addition:Later, some test methods were added. If class C inherits class A and overloads some of the static member variables in class A, reload The more loads, the closer the speed will be to Class B (non-delayed), but the speed of Class A will still be slower than Class B and Class C
The above is the detailed content of Detailed explanation of the comparison between static delayed binding and ordinary static efficiency in PHP. For more information, please follow other related articles on the PHP Chinese website!
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