Yeah, even in-memory processes can be sped up by compression/decompression. When you're not running entirely in cache, which many old games can be done. Doom 1

Yeah, even in-memory processes can be sped up by compression/decompression. When you're not running entirely in cache, which many old games can be done. Doom 1+2 (including all the data) can be entirely loaded into modern high end CPU cache.