Yup, upx is just a loading stub that decompresses the whole thing then gets out the way. If anything it'll use more memory from the remains of the decompressio

Yup, upx is just a loading stub that decompresses the whole thing then gets out the way. If anything it'll use more memory from the remains of the decompression stub and not being able to be clever about only reading from the backing file needed memory pages.