grisina

AMD Athlon II 620 QuadCore 2.5 seconds on my turtle...

However, I would argue that it shouldn't take more than 2 seconds to figure this out. If you know enough to want to disable UPX, you should know it's a compressor therefore a quick look at the options will provide only one with "UPX" and "compress" in the name. Maybe it is mis-named and not implemented right, but I don't think it takes a computer science degree to figure out what it's for if you know enough about UPX to want to disable it in the first place.