Re: LVM_INSERTITEM very slow in vista/W7

I might suggest:

1) Open a support incident with Microsoft.  If they confirm a bug, I believe it's free or doesn't use up one of your MSDN incidents.  They will probably ask for a demo project that reproduces the problem, so you might want to have something like that on hand.

2) What if you used custom draw?  You might try this, and just experiment with returning just CDRF_DODEFAULT from OnPrePaint.  If that doesn't work, perhaps doing some of your own painting via custom draw would be a workaround.  Custom draw is pretty simple to do.

This certainly sounds like a serious bug in Windows 7 common controls.

~Mike

--- In [email protected], "umeca74" <umeca74@...> wrote:
>
> --- In [email protected], Stuart Dootson <stuart.dootson@> wrote:
> > 
> > Demonstrate with objective evidence rather than just speculating. Find
> > where the slow down is, using some form of profiling, even if it's
> > manually inserted timers. You will get nowhere without properly
> > measured evidence.
> > 
> 
> I don't think you've read my messages
> 
> as further 'evidence' if I turn off redraw, inserting the item is fast but it takes the 10 seconds to process the SetRedraw(TRUE) message. It is clearly some paint issue, and as I'm not doing any painting myself, the problem lies somewhere inside the listview
> 
> I've just checked that the delay is somewhere BEFORE the WM_PAINT and after the SetRedraw(TRUE). I don't know what the listview is doing
>




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