Why does Embarcadero ODBC work but Qt ODBC lags? And is there a replacement?

Question

Delphi

They decided to make a new version of the program on Qt, because a version for Mac is planned. But even the Windows version can't really be launched, and there are many reasons for this. Here are two.
1. Embarcadero has a nice database preview component. Qt also has it, but it only works on bidirectional requests.
2. The same requests (heavy, for 20 seconds) run on Embarcadero and fail (probably due to a timeout) on Qt.
What do you think? Are there any bypasses? Should I switch to another DB library? If so, which one?

Answer 1

Again, you have to answer yourself.
Qt ODBC is extremely slow, use a different library!

Answer 2

If the timeout falls off, then increase the timeout.