Example of php getting the execution time of the target function _ php instance

This article mainly introduces the example of php getting the execution time of the target function. If you need it, you can refer to a class to test the execution time of the target function. The following is the class definition code:

The Code is as follows:

/**
* Class EfficiencyTester
* Efficiency tester: test the function running time
* @ Version 1.0 2013.04.13
* @ Author Kross
*/
Class EfficiencyTester {
/**
* Var $ testTimes
* Number of tests
*/
Private $ testTimes = 1000;

/**
* Function getTime ()
* Obtain the timestamp based on the time mode.
* @ Param $ timeModel time mode. Default Value: microsecond
* @ Return int Timestamp
*/
Private function getTime ($ timeModel = 'ms '){
If ($ timeModel = 'ms '){
Return microtime ();
} Else if ($ timeModel ='s '){
Return time ();
} Else {
Return microtime ();
}
}
/**
* Function testOnce ()
* Test the target function once and return the running time
* @ Param $ functionName target function name
* @ Param $ timeModel time mode. Default Value: microsecond
* @ Return double the time when the target function runs once (very random)
*/
Public function testOnce ($ functionName, $ timeModel = 'ms '){
$ StartMicroTime = $ this-> getTime ($ timeModel );
$ FunctionName ();
$ EndMicroTime = $ this-> getTime ($ timeModel );

$ CostMicroTime = $ endMicroTime-$ startMicroTime;

Return $ costMicroTime;
}
/**
* Function test ()
* If the target function is tested multiple times, the running time (average value) is returned)
* @ Param $ functionName target function name
* @ Param $ timeModel time mode. Default Value: microsecond
* @ Return double the running time of the target function
*/
Public function test ($ functionName, $ timeModel = 'ms '){
$ TotalMicroTimes = 0;
For ($ I = 1; $ I <= $ this-> testTimes; $ I ++ ){
$ TotalMicroTimes + = $ this-> testOnce ($ functionName );
}
Return $ totalMicroTimes/$ this-> testTimes;
}
}
?>

The following is the test code of the class:

The Code is as follows:

Require_once ('../class/EfficiencyTester. class. php ');
$ E = new EfficiencyTester ();
Echo $ e-> test ('rand ');
?>

At first, I directly used microtime () to get the time. Later I thought that if I wanted to get the running time in seconds, the write would not be polymorphism enough. Then I wrote a getTime () but it seems that the running time of the target function is longer, probably because the judgment in the getTime () function takes some time.