Per-frame allocation would be very cheap with a tuned generational GC run every frame, as nothing would be live at the end of the frame and thus tracing would t

Per-frame allocation would be very cheap with a tuned generational GC run every frame, as nothing would be live at the end of the frame and thus tracing would take almost no time. Of course the same would be true of an arena allocator, at the cost of needing to classify every allocation accurately.