I brought up the topic (Performance MapWinGIS 5.2) of performance degradation in MapWinGIS 5.2.
In this thread, Mathijs.Dumon answered me that compared to version 5.1 there have been significant changes with rendering (er-category scale dependency, per-feature point rotation using expressions, relatively positioned line segment markers, label generation for dynamic layers)
The drop in productivity at that time reached several times (200-300%)
After that, a fix was released and the work was restored as before, but this is only visually by eye.
Now, with the constant use of version 5.2, I noticed that the difference in performance between 5.1 and 5.2 is about 30-40%. And this is very unpleasant … very noticeable when scrolling with the mouse wheel with a large number of objects and layers. On one layer and with a small number of rendered objects, without styles, it probably won’t be striking. I have researched this question quite well. At the moment, version 5.1 is the best in terms of rendering speed. However, I really want to use version 5.2. I use MapWinGIS in conjunction with PostgreSQL 11 and new versions of PostgreSQL 12, 13 are not available to me with version 5.1. Only 5.2 can work with these versions of SQL Server. And of course I would like the performance to be higher or at least not worse in the new versions of MapWinGIS.
I understand that the product is created by enthusiasts and perhaps a 30-40% loss in productivity will be a very minor issue to devote time to.
But still I will ask the question - is there anything else you can do? To try and match the performance of 5.1?
Sorry for my english … this is google translate. Therefore, some turns of speech may not be entirely clear.