时序与异步函数循环 [英] Timing loops with asynchronous functions

问题描述

是否有可能得到一个循环的执行时间与异步函数的循环内？

Is it possible to get the execution time of a loop with an asynchronous function inside of the loop?

下面将工作同步功能，但不是异步的：

The following would work for synchronous functions, but not asynchronous:

var amount = 100; 
var start = new Date().getTime();

for(var i=0; i < amount; i++){
 // function 
}

var end = new Date().getTime();
var time = (end - start) / 1000;

如果是这样，我怎么能转换成上述code，使时间持有的总时间的循环（和内部功能）需要运行值？

If so, how can I convert the above code so that time holds the value of the total time the loop (and the function inside) takes to run?

推荐答案

您可以用这样的事情做;

You can do it with something like this;

var amount = 100; 
var completionAmount = 0;
var start = new Date().getTime();
var end, time;
var theFunction = function(){
    // bla bla
}
var calbackOfTheFunction = function(){
    //bla bla
    completionAmount++;
    if(completionAmount === 100){
        end = new Date().getTime();
        time = (end - start) / 1000;
    }
};


for(var i=0; i < amount; i++){
    theFunction(); 
}

这篇关于时序与异步函数循环的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！