Using Firestorm and lately I experienced slow rezz of regions, slow FPS and not able to move as long textures are rezzing. Tried Black Dragon and noticed huge difference in usage of my GForce 1060 6 GB graphics. I used same settings and adjusted to same settings in both viewers and a low draw distance of 96 meters.
Firestorm 6.3.9 (58205) May 27 2020 01:20:51 (64bit): GPU VRAM usage 3.2 GB
Black Dragon 6.4.3.46541 (64bit): GPU VRAM usage 1.6 GB
That is a huge difference! Notice Black Dragon uses the CPU more but at same time the memory more efficient.
I am a little baffled by this huge difference - and for me, the general performance of FS has gone worse and worse with the latest updates.