Correction - decompression took a long time in the early nineties. Data requirements have gone up by 3-4 orders of magnitude, but processing power has gone up by 5-6 orders of magnitude if you do it on the GPU.Johann610 said:First, cartridges encourage data compression, and data UN-compression is a lengthy process. SNES titles like Batman [loading] Forever and Mickey [looks at his watch] Mania show how awful this can get.
In fact, the job can be done fast enough to do it every frame. Texture compression methods for instance are specifically designed so that the GPU can render directly from the compressed texture. It first appeared on S3 cards which were available in the late 90s.