Comment 55 for bug 1959747

Version 102.12.0 seems to have fixed the issue on my setup (Debian 11.7, Xfce, AMD Ryzen 4750u with integrated graphics in a Thinkpad T14 AMD Gen 1). The message list highlighting is just as responsive as the folder list now. It still uses quite a bit of CPU when moving the mouse over the list, however, it's snappy and responsive now - the lag I was experiencing before seems to be completely gone.