Well, definitely, I must have some kind of issue. In automatic mode with your settings, I'm not going over 63fps (which is already pretty good for me). I don't see any noticeable artifacts, but the movie I tested—aside from some vegetation and very fast movements—doesn't have many challenging scenes. However, I do have a config added to the override.js file; I'm not sure if that's a good thing or just a coincidence."
"I think my bottleneck might be the CPU, an i5 12400f with only 12 threads; I can't think of anything else. I'm leaving my override settings here—I got them from a thread on this forum, but I don't remember which one
levels.pel = 2;
levels.scale.up = 2;
levels.scale.down = 4;
levels.full = true;
analyse.block.w = 32;
analyse.block.h = 32;
analyse.block.overlap = 1;
analyse.main.levels = 4;
analyse.main.search.type = 4;
analyse.main.search.distance = -24;
analyse.main.search.coarse.type = 4;
analyse.main.search.coarse.distance = -5;
analyse.main.search.coarse.bad.range = 0;
analyse.main.penalty.lambda = 1.0;
analyse.main.penalty.plevel = 4.0;
analyse.main.penalty.lsad = 800;
analyse.main.penalty.pnew = 5;
analyse.main.penalty.pglobal = 5;
analyse.main.penalty.pzero = 10;
analyse.main.penalty.pnbour = 5;
analyse.main.penalty.prev = 0;
analyse.refine[0] = {thsad:2000, search:{distance:2, type:4}};
smooth.rate.num = 5;
smooth.rate.den = 2;
smooth.algo = 21;
smooth.scene.mode = 0;
smooth.mask.cover = 10;
smooth.scene.limits.m1 = 3600;
smooth.scene.limits.m2 = 7200;
smooth.scene.limits.scene = 10400;
smooth.scene.limits.zero = 10;
smooth.scene.limits.blocks = 90;