[Rd] cpu usage high with windows change dir / winDialogString (PR#11045)

[Sean O'Riordain]

Hi Duncan,

I suspect that it's not the SHBrowseForFolder call as it seems fine
once the Browse button is pressed - the problem occurs *before* the
Browse button is pressed.

Regards,
Sean


On 29/03/2008, Duncan Murdoch <murdoch at stats.uwo.ca> wrote:
> On 29/03/2008 12:23 PM, Gabor Grothendieck wrote:
>  > On Sat, Mar 29, 2008 at 12:06 PM, Duncan Murdoch <murdoch at stats.uwo.ca> wrote:
>  >> On 28/03/2008 12:05 PM, seanpor at acm.org wrote:
>  >>> Good afternoon,
>  >>>
>  >>> This is possibly a windows only bug, definitely of comparatively low
>  >>> importance - but for the sake of completeness here we go.  I've
>  >>> searched http://bugs.R-project.org/ etc., but can find no mention.
>  >>>
>  >>> For RGui.exe, the CPU usage goes to 100% for certain dialog boxes for
>  >>> the duration that the dialog box is visible, e.g.
>  >>>
>  >>> * check CPU usage is low
>  >>> * On the RGui.exe menu chose File / Change dir...
>  >>> * the CPU usage goes to 100%
>  >>> * hit OK
>  >>> * the CPU usage goes back down again
>  >> What is the bug here?  I'd guess it's not R using the cpu, rather some
>  >> other process hooked to the dialog, but even if it really is R, why is
>  >> this a bug?
>  >
>  > Maybe R is sitting in a loop consuming all the resources of the system?
>
>
> It's a SHBrowseForFolder call, with a callback.  If there's a bug, it
>  looks to me as though it's in Windows.
>
>
>  Duncan Murdoch
>