+Although there are quite a few Power ISA simulators, none of them
+are up-to-date or are suited to high performance, like cavatools.
+cavatools is multi-process and extremely fast, using relatively little
+memory, where power-gem5, which has a different focus and has huge flexibility
+and usefulness for research, uses vast amounts
+of memory and is much slower. cavatools also has hardware-level cycle-accurate emulation which is extremely useful and important for analysing experimental
+instructions, which is a feature that no other Power ISA Simulator has.
+DolphinPC and pearpc are over 15 years old and were targetted at 32 bit
+emulation of much older Power ISA processors. Libre-SOC's python-based
+simulator only achieves aroubd 2,000 instructions per second on
+high performance hardware whereas
+cavatools achieves 200,000 instructions per second per processor
+on modest hardware.
+IBM's own Power ISA simulator is proprietary and, because it contains
+confidential experimentation internal to IBM, may not be made public.
+