How do you convert Stopwatch ticks to nanoseconds, milliseconds and seconds?
This is a very basic question...quite embarassing, but here goes:
I have a Stopwatch block in C# code. I determine the elapsed time in ticks and then want to convert to ns, ms, s. I know that the Frequency is provided by the Stopwatch class and that it is required for conversion.
Thanks
Stopwatch.Elapsed is a TimeSpan, so you can do myStopwatch.Elapsed.TotalMilliseconds
, myStopwatch.Elapsed.TotalSeconds
, etc.
// Create new stopwatch
Stopwatch stopwatch = new Stopwatch();
// Begin timing
stopwatch.Start();
// Do something
for (int i = 0; i < 1000; i++)
{
Thread.Sleep(1);
}
// Stop timing
stopwatch.Stop();
// Write result
Console.WriteLine("Time elapsed (s): {0}", stopwatch.Elapsed.TotalSeconds);
Console.WriteLine("Time elapsed (ms): {0}", stopwatch.Elapsed.TotalMilliseconds);
Console.WriteLine("Time elapsed (ns): {0}", stopwatch.Elapsed.TotalMilliseconds * 1000000);
Output:
Time elapsed (s): 2.4976622
Time elapsed (ms): 2497.6622
Time elapsed (ns): 2497662200
Note that stopwatch.ElapsedMilliseconds
returns a long
and is thus only precise up to the millisecond, while stopwatch.Elapsed.TotalMilliseconds
returns a double
and has the same precision as stopwatch.ElapsedTicks
, except it's easier to use. ILSpy shows that TimeSpan.TotalMilliseconds
is computed using ticks anyway.
According to MSDN, Frequency tells you the number of ticks per second. Therefore:
Stopwatch sw = new Stopwatch();
// ...
double ticks = sw.ElapsedTicks;
double seconds = ticks / Stopwatch.Frequency;
double milliseconds = (ticks / Stopwatch.Frequency) * 1000;
double nanoseconds = (ticks / Stopwatch.Frequency) * 1000000000;