Re: [PySide] model/view: faster to access a user role than accessing a dict?
Cool, thanks for the reassurance. I will focus on readability. Cheers, frank On Tue, Oct 4, 2022 at 2:36 PM Tim Roberts wrote: > On 10/3/22 12:19, Frank Rueter wrote: > > > I wasn't talking about the time it takes to put data into the > > model but the reactiveness of the resulting view when lots of data is > > present and the user needs to traverse the tree view and filter it as > > quickly as possible. > > OK, but remember that nothing gets drawn until your handler returns and > you get to the main loop to dispatch messages. The computation time > between those two approaches will be essentially identical, so the user > experience should be the same. > > -- > > Tim Roberts, t...@probo.com > Providenza & Boekelheide, Inc. > > ___ > PySide mailing list > PySide@qt-project.org > https://lists.qt-project.org/listinfo/pyside > ___ PySide mailing list PySide@qt-project.org https://lists.qt-project.org/listinfo/pyside
Re: [PySide] model/view: faster to access a user role than accessing a dict?
On 10/3/22 12:19, Frank Rueter wrote: I wasn't talking about the time it takes to put data into the model but the reactiveness of the resulting view when lots of data is present and the user needs to traverse the tree view and filter it as quickly as possible. OK, but remember that nothing gets drawn until your handler returns and you get to the main loop to dispatch messages. The computation time between those two approaches will be essentially identical, so the user experience should be the same. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. ___ PySide mailing list PySide@qt-project.org https://lists.qt-project.org/listinfo/pyside
Re: [PySide] model/view: faster to access a user role than accessing a dict?
Frank Rueter wrote: I am building a model for a tree view and have a dictionary that represents all the data in the required hierarchy. I have to be able to filter the view, select things programmatically and show info based on selected items etc. I am wondering: With all required data per item available in a dict, is it more efficient to just stuff that into the item's UserRole data or to create custom user roles for each value in the dict that I will be filtering/sorting by or looking up for some other reason? E.g.: Will there be a difference in performance with this: Let's be honest. This is code that gets execute once. Performance is not a consideration. Do whatever makes the code simpler. It's almost never smart to spend time optimizing your initialization. -- Tim Roberts, t...@probo.com Providenza & Boekelheide, Inc. smime.p7s Description: S/MIME Cryptographic Signature ___ PySide mailing list PySide@qt-project.org https://lists.qt-project.org/listinfo/pyside
