计算时差(以毫秒为单位) [英] Calculating time difference in Milliseconds

问题描述

我正在通过传递ipAddress来调用方法，该方法将返回ipAddress的位置，例如国家/地区，城市等.因此，我试图查看每个调用花费了多少时间.因此，我在调用方法之前设置了start_time，在调用之后设置了end_time. 所以有时我得到的差异为0 .并且resp包含有效的响应.

I am making a call to a method by passing ipAddress and it will return back the location of ipAddress like Country, City, etc etc. So I was trying to see how much time it is taking for each call. So I set the start_time before making call to method and end_time after making a call. So sometimes I get difference as 0. And resp contains the valid response.

long start_time = System.currentTimeMillis();
resp = GeoLocationService.getLocationIp(ipAddress);
long end_time = System.currentTimeMillis();
long difference = end_time-start_time;

因此，这意味着有时需要0毫秒才能获得响应.任何建议将不胜感激.

So that means sometimes it is taking 0 ms to get the response back. Any suggestions will be appreciated.

推荐答案

尝试一下

long start_time = System.nanoTime();
resp = GeoLocationService.getLocationByIp(ipAddress);
long end_time = System.nanoTime();
double difference = (end_time - start_time) / 1e6;

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