Hm I certainly sympathise, just hadn't occurred to me the filesystem might be a bottleneck here. I switched from my work Mac to my desktop and bought (or rather, so I could buy) more RAM, since it was exhausted building, and would frequently crash.
I now have enough to be able to give it 'enough' and cgroup limit it from hogging more and interrupting my browsing etc. but I don't think I've given it so much that, what, the speed at which it can read the 100ks of files in order to 'webpack' them is the limiting factor.
Perhaps I'm just (foolishly) content living with it much slower than you are, so I don't have everything else fast enough for that to be the problem.
I now have enough to be able to give it 'enough' and cgroup limit it from hogging more and interrupting my browsing etc. but I don't think I've given it so much that, what, the speed at which it can read the 100ks of files in order to 'webpack' them is the limiting factor.
Perhaps I'm just (foolishly) content living with it much slower than you are, so I don't have everything else fast enough for that to be the problem.