8.4.1 released with performance improvements, networking improvements and bug fixes.
This release took 5 hours to produce. If you like the work I do, consider supporting me!
Updated recommended base launch options to: -novid -nojoy -nosteamcontroller -nohltv -particles 1 -NoQueuedPacketThread +cl_clean_textures_on_death 1 +mat_lodin_time 0
You can also try +cl_threaded_bone_setup 1 which enables threaded bone setup for animations, improving performance. It is not enabled by default as it can cause crashes, but many people have reported that it has worked fine for them.