[PyQt] Performance problems with QSortFilterProxyModel

[Steve Borho]

On Wed, May 12, 2010 at 1:04 AM, Mark Summerfield <list at qtrac.plus.com> wrote:
> On 2010-05-12, Steve Borho wrote:
>> Hello,
>>
>> The TortoiseHg project is currently porting all of our PyGTK apps to
>> PyQt, This has been going pretty well so far, but I've hit a snag with
>> our file status browser.
>>
>> I have a simple QAbstractTableModel (4 columns) being displayed in a
>> QTreeView.  After connecting a QSortFilterProxyModel between the tree
>> view and the data model, reloading the model became very expensive for
>> moderately sized data sets.  After calling setSourceModel() with a
>> model of 555 rows, I counted over 3 million calls to the model data()
>> method, which takes about 15 seconds.
>
> Have you tried switching off sorting just before resetting the model and
> then switching it back on afterwards?

I just tried with this:

  tm = MyTableModel(data)
  tv.setSortingEnabled(False)
  proxy.setSourceModel(tm)
  tv.setSortingEnabled(True)

But it made no performance difference.

--
Steve Borho