stopwatch | 易学教程

Can Stopwatch be used in production code?

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问题 I need an accurate timer, and DateTime.Now seems not accurate enough. From the descriptions I read, System.Diagnostics.Stopwatch seems to be exactly what I want. But I have a phobia. I'm nervous about using anything from System.Diagnostics in actual production code. (I use it extensively for debugging with Asserts and PrintLns etc, but never yet for production stuff.) I'm not merely trying to use a timer to benchmark my functions - my app needs an actual timer. I've read on another forum that

Raise event in high resolution interval/timer

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问题 I want to use the highest possible resolution timer using c#. For example, I want to raise an event every 11 ticks (I've heard that tick is the highest possible counter in pc). I tried timer and found that minimum elapsed time is in milliseconds. I looked at stopwatch but stopwatch doesn't raise events. Thanks. 回答1: Using a multimedia timer should give you about 1000 events per second. This code should help you on the way. public delegate void TimerEventHandler(UInt32 id, UInt32 msg, ref

Stop watch delay using timer c#

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问题 I want to add a stopWatch to my form but the one i made is lagging behind the time of other timer in pc. Can you give any solution for that? (My timer interval is 100). this is my code: int min, sec, ms = 0; private void timer1_Tick(object sender, EventArgs e) { Time.Text = min + ":" + sec + ":" + ms.ToString(); ms++; if (ms > 9) { ms = 0; sec++; } if (sec > 59) { sec = 0; min++; } } private void timer_Click(object sender, EventArgs e) { timer1.Start(); } It working but with easy delay. I

Taking Screenshot after 1 minute [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 2 years ago . I have two questions: 1. How can I take screenshot after every 1 min, when a key is pressed E.g. 10:00: -> key pressed -> Img1 10:01: -> key pressed -> Img2 10:02: -> key pressed -> Img3 2. How can I iterate the image chain assuming my program runs for 5-10 mins string ImgPath = @

Chronometer timer does not stop

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问题 I have a chronometer timer on a fragment and I want it to reset to 00:00 and stops when I press a button. Here is the code of the fragment: public class FirstFragment extends Fragment { Chronometer chronometer; @Overried public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.fragment_memo, container, false); Button testButton = view.findViewById(R.id.btn_test); chronometer = view.findViewById(R.id.stop

Format Stopwatch to display 00:00

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问题 I am experimenting with using a stopwatch in one of my apps and I have got it to where it will start counting seconds on start and stop counting on stop. My problem is that it will keep going on after 60 seconds. For example I get 120 seconds if I waited for two minutes. So my question is how can I make it so once the seconds reached 60 the minutes would be increased by one and the seconds would start over? So instead of :120 I would get 2:00. Here is the code I have: final int MSG_START

How can I implement a stopwatch in my socket Python program

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问题 I am creating a very simple ping program in Python that will send 16- 64 bytes of information to a local server, once the server has received all the bytes, it will send back a 1 Byte message back to the client. (We are testing wifi speeds...) it is very crucial that my client program measures how much time it took to send these bytes. I need a "stopwatch" to measure in milliseconds how much time it took to get the 1 byte message back from the server. My question is, how can I do this? I know

如何测量函数执行所需的时间

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 我需要获取执行时间（以毫秒为单位）。我最初是在2008年问这个问题的。当时接受的答案是使用 new Date（）。getTime（）。但是，我们现在都同意使用标准 performance.now（） API更合适。因此，我正在改变对此的公认答案。 #1楼不要使用Date（）。参见下文。使用 performance.now() ： <script> var a = performance.now(); alert('do something...'); var b = performance.now(); alert('It took ' + (b - a) + ' ms.'); </script> 它适用于： IE 10 ++ 火狐15 ++ 铬24 ++ Safari 8 ++ Opera 15 ++ Android 4.4 ++ 等等 console.time 对您来说可能是可行的，但这是非标准的 § ：此功能是非标准的，不在标准轨道上。请勿在面向Web的生产站点上使用它：它不适用于每个用户。实现之间也可能存在很大的不兼容性，并且将来的行为可能会更改。除了浏览器支持， performance.now 似乎因为它似乎是的裸机版本，必须提供更准确的计时的潜力 console

How to create 300 stopwatches in C# more efficiently?

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问题 I'm creating an UWP application that needs to measure the time the user is looking at an object. This application has around 300 objects to measure the time of. To do this we will be using around 300 timers. To achieve this we will have to create 300 stopwatches individually which is highly inefficient. The timer starts when the user is looking at the corresponding object and stops when the user is no longer looking at the corresponding object. If the user's gaze is fixated on the

Stopwatch.GetTimeStamp on multiprocessors

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问题 Stopwatch.GetTimeStamp() may return different timing results on different processors because of bugs in the BIOS or the Hardware Abstraction Layer. Does anyone know what these bugs hold in store in concrete terms? Could timestamps on different processors potentially be totally unrelated - or would they be only off by some small amount (sub-milliseconds?) at most? Could numbers on different processors drift apart over time - which then would in effect lead to the aforementioned "timestamps