The CPU must decompress data on the fly. On lower-end Android devices, highly compressed files (like heavy CSO) can lead to stuttering or long loading times.
When people refer to "highly compressed" versions, they are typically talking about converting the original game files into formats that save space without losing data: gow 2 highly compressed for android
When he tapped, the screen flickered… and his reflection didn’t move. A voice, not from the speakers but from the phone’s vibration motor, hummed: The CPU must decompress data on the fly