It may be useful to check if you need all your data in the application ( for example, you can remove old data)
You can reduce this loading problem by making the document always available in the memory ( if this is an option for you). You can set this in QMC -> User document tab -> select your document -> on the right, go to the server tab-> availability tab-> check the preload option.
It will take some time to reload the application to the memory after every data reload.
Qv applications are stored in a compressed format by default. It is a trade-off. When you compress it, it will become a smaller file, but it may take longer to open it. You can disable it ( and compare the results) in document settings->general tab -> save format: compression. It may even take longer depending on the performance of your disks...
thanks for this. As said, i reduced the size of document and went better. The link you sent is excellent.
the option you said about making the document available in memory is located in the "performance tab" of the Server tab. There is a "preload" option. Is that what you mean? in the availability tab i do not see a "preload" option.