[drewg123]

One thing that makes me nervous about the increased use of SIMD in new ways is that more processes will be using SIMD. This, in turn, make context switches that much more expensive as the SIMD registers must be saved and restored when switching to a new process that also uses SIMD.

[Cthulhu_]

Is this an actual, measurable, major issue or just a gut feeling? Context switches in general are suboptimal but pretty normal.