RadRichTextBox slow in Demo

[Roy]

Hello,

I'm experiencing performance issues with the RadRichTextBox.  The control is generally unresponsive and typing lags.  It can literally take minutes for a typed sentence to display.

Here's some information that may help:

I'm running this on a pretty beefy machine.
Windows 7 Enterprise (Service Pack 1) 64 bit
Dell Precision WorkStation T3500
Intel Xeon CPU @ 3.20 GHz
12 GBs of RAM

This happens in the "Telerik radControls for WPF Q1 2012 SP1" demo application.  It's most noticeable on the default RadRichTextBox demo (in the Over View category).  The Data Binding RadRichTextBox example is responsive and works pretty well.

I've tried uninstalling and re-installing the demo;  This did not speed up performance.  These performance issues are also present in a custom test application that uses the control.  It's notable my co-worker (with an almost identical setup) does not experience this.

Please advise.

Thanks! 

[Vasil]

Hi Roy,
We haven't observed such behavior until now. As it seems the problem is specific to your machine, you could try to use performance profiler like Telerik JustTrace (you can download free trial) to investigate it. You could also try to upgrade to the just released Telerik RadControls for WPF Q2 suite to ascertain whether the failure persists there.

Please, let us know how it goes. 

Regards,
Vasil
the Telerik team

[Robert]

I am also experiencing performance issues with RadRichTextBox.
Initially it runs smoothly, then after some use it becomes slower. Trying to work out why myself.

I'm using library version 2012.1.326.40

I will see what just trace comes up with. I've never used it before but I will see what I can find.

PC Spec:
Intel Core i7 clocked to 4.6GHz
16GB RAM
Solid State Hard Drive
Windows 7 64 bit

[Vasil]

Hello Rob,

Please refer to the answer of the another forum post you wrote, for an explanation of what may be causing the problem and how to handle it.

Greetings,
Vasil
the Telerik team

[Roy]

The latest release behaves like the previous version (in this regard).  However, I found the radrichtextbox runs at a normal speed when I run Visual Studio as Administrator, so that's what I'm doing for now.  This is true for the latest and previous release.  I hope that helps someone.