Transfer speed drastically slows down when logging level is Debug 2

Hi! I noticed that transfer speed drastically slows down when logging level is set to "Debug 2". Speed drops from 11 Mbps to 1.5 Mbps. That doesn't happen if Debug level set to "Debug 1" or "Normal" or "Reduced".
I have shown it on the attached video.

Yes that's true. You should not use the "Debug 2" logging level for your normal work. It's for debugging purposes only.

It would be good if there would some warning about the transfer speed be shown, when user (accidentally) sets "Debug 2".

Ok, good idea.

See Issue 2155 – Warn when user selects too verbose logging level that degrades performance