Addendum to my post, above:
I am using an average 15 year old PC, with Win 7. (Don’t bother. I’ve heard it all before. I still use DOS programs.)
LR2 initially took seconds to start. My preferences are set to cache images, so the game takes about 10 seconds to load. Using ‘un.rpyc’ the FIRST time added a few seconds. I immediately removed it from the “GAME” folder, before running the decompiled game, as I didn’t want it to do any decompiling on subsequent starts. I notice no real difference in starting the decompiled vs. compiled game, and the game runs smoothly. If your startup seems sluggish, remove ‘un.rpyc’ from the “GAME” folder.