Image decompression is pretty easy, CPU-wise. Well over a decade ago, computers were happily rendering JPEGs on-the-fly without storing a decompressed version (

Image decompression is pretty easy, CPU-wise. Well over a decade ago, computers were happily rendering JPEGs on-the-fly without storing a decompressed version (RISC OS apps did this). Your desktop/laptop/phone has plenty of ability to do this.