timer
PowerShell show elapsed time
This gave me the output I was after 🙂 $StartTime = $(get-date) $elapsedTime = $(get-date) – $StartTime $totalTime = “{0:HH:mm:ss}” -f ([datetime]$elapsedTime.Ticks)
How to use Timer class to call a method, do something, reset timer, repeat?
If you want to simply use Timer, I would do something like this: public class TestClass { public long myLong = 1234; public static void main(String[] args) { final TestClass test = new TestClass(); Timer timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { test.doStuff(); } }, 0, test.myLong); } public void … Read more
How can I reproduce the race conditions in this python code reliably?
Traditionally, forcing race conditions in multithreaded code is done with semaphores, so you can force a thread to wait until another thread has achieved some edge condition before continuing. For example, your object has some code to check that start is not called if the object is already running. You could force this condition to … Read more
Does a QTimer object run in a separate thread? What is its mechanism?
When I create a QTimer object in Qt 5, and start it using the start() member function, is a separate thread created that keeps track of the time and calls the timeout() function at regular intervals? No; creating a separate thread would be expensive and it isn’t necessary, so that isn’t how QTimer is implemented. … Read more
How can I perform a short delay in C# without using sleep?
If you’re using .NET 4.5 you can use the new async/await framework to sleep without locking the thread. How it works is that you mark the function in need of asynchronous operations, with the async keyword. This is just a hint to the compiler. Then you use the await keyword on the line where you … Read more
High resolution timer in .NET
Here is a sample bit of code to time an operation: Dim sw As New Stopwatch() sw.Start() //Insert Code To Time sw.Stop() Dim ms As Long = sw.ElapsedMilliseconds Console.WriteLine(“Total Seconds Elapsed: ” & ms / 1000) EDIT: And the neat thing is that it can resume as well. Stopwatch sw = new Stopwatch(); foreach(MyStuff stuff … Read more
Reschedule timer in android
If you see the documentation on Timer.cancel() you’ll see this: “Cancels the Timer and all scheduled tasks. If there is a currently running task it is not affected. No more tasks may be scheduled on this Timer. Subsequent calls do nothing.” You’ll need to initialize a new Timer when you are rescheduling: EDIT: public void … Read more
Windows Service System.Timers.Timer not firing
Here is my work-around… After way too many hours searching for an answer to this, I discovered a wide variety of articles and blogs discussing timers in Windows services. I’ve seen a lot of opinions on this and they all fall into three categories and in descending order of frequency: Don’t use System.Windows.Forms.Timer because it … Read more
Fortran intrinsic timing routines, which is better? cpu_time or system_clock
These two intrinsics report different types of time. system_clock reports “wall time” or elapsed time. cpu_time reports time used by the CPU. On a multi-tasking machine these could be very different, e.g., if your process shared the CPU equally with three other processes and therefore received 25% of the CPU and used 10 cpu seconds, … Read more