Can I lessen the overhead of stylus/touch input in a WPF application?
The WPF Team did some touch fixes in 4.6 and 4.6.1. (I'm a software engineer on the WPF Team)
The engineer who did that work, after reading this question said:* Yeah 4.6.1 should have helped that significantly.* They should also make sure heavy processing is done outside of the touch events themselves since that will tie up the main thread.
4.6.1 Release candidate was made available in October 2015.
Thanks, Rob Relyea
The release notes for the .NET Framework 4.6.1 RC does claim that the touch stack performance has been improved. The description sounds like it would address this issue.
Touch stack performance has been improved with coalescing support added to touch events such that current position is reported after a UI thread delay similar to mouse pointer movements
http://blogs.msdn.com/b/dotnet/archive/2015/10/29/announcing-net-framework-4-6-1-rc.aspx