It should be instant.

I tried to recompile the source code with x86 instead of AnyCPU, but the performance is the same.

Is there anything I can re-template to speed it up?

Hello,

I brought this up to the developer but we cannot seem to find any reason why this should be that slow. There are many child cells being generated but we will try to profile your sample and find a way to optimize this. I am going to open a support case on your behalf so that we will notify you when we resolve this.

HI,

 I will bring this issue to the attention of our developers
 Sincerely,

 Matt
 Developer Support Engineer

I don't see any difference too...

Hi Matt,

I tried the 2010.3 today and updated the sample application to use the new version. However, the expansion performance is still the same, I couldn't tell the difference between this and running it with 2010.2. Please raise the issue to development team and we still need further help on this issue... .

Thanks,
Yu

That is good news that you are improving the performance of the grid

Because the performance of the xamdatagrid is very bad at the moment.

In my usage of the grid the standard wpf datagrid takes less than a second to refresh with a new set of data ( 30 rows, 9 columns 4 columns with combo boxes)

and the xamdatagrid takes 5-6 seconds to do the same refresh with the same data and setup. Excluding the custom colouring of cells that occurs on the wpf grid. 5-6 seconds is almost unusable.

I look forward to the new release with speed improvements

Regards

Murray