[GNC-dev] "2" version of source code

[Geert Janssens]

Op dinsdag 14 juli 2020 20:53:51 CEST schreef John Ralls:
> I don't think that the speed is fixable on Gtk3: GtkTreeModels are slow and
> big ones are slower. Gtk4 has a new ListModel architecture that's supposed
> to be faster but of course it hasn't yet encountered the real world so
> there's no way to be sure.
> 

I had come to the same conclusion shortly before the GnuCash 4.0 release. It may not be very 
useful to redo this attempt with GtkTreeView. For myself I had delayed this to after the Gtk 4 
release.

OTOH there are two aspects to this of course:
- the view side (which is responsible for displaying the info on screen). This is GtkTreeView and 
there's not much that can be done to tweak it.
- the model (which is responsible for managing the data itself in memory). So far we are mostly 
using GtkTreeModel's default implementation. I have been tempted to implement our own 
implementation of the GtkTreeModel API though using C++ vectors and move semantics. I am 
curious to find out if that can be made into a more efficient model implementation. However 
here again, I'm pretty sure this is way to early in the current state of our C++ conversion. For 
this to work, the primary data objects (transaction,split, account,...) should all be implemented 
in C++.

Regards,

Geert