I think it's also possible they used some static recompilation for at least a few games - you had to have room to download a profile for every game as part of the emulator, and it could save some headaches if certain sections of certain games were replaced with simpler code.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
