Which timer to use ?

Question

I like to do something every 100 ms.
The timer seems to work fine until you count the times it fires.
450 instead of the expected 600.
I did expect some inaccuracy but this is a lot.
I am using a dispatcher timer because there is some UI work in there too,
I can separated that from the things that I really wanted to do, but I want to know.
Is there a timer that is better than the dispatcher-timer ?
What timer would you use ?

Answer 1

Maybe something make the dispatcher thread busy sometimes and i think that some optimizations must be made .. Anyway try also to set the timer as Send priority
https://docs.microsoft.com/en-us/dotnet/api/system.windows.threading.dispatcherpriority?redirectedfrom=MSDN&view=windowsdesktop-6.0