Many of you have on-the-fly code compression in your pocket. When I worked in their R&D dept, I developed a feature for Qualcomm's modem chips that allowed the

Many of you have on-the-fly code compression in your pocket. When I worked in their R&D dept, I developed a feature for Qualcomm's modem chips that allowed the code to be shipped in compressed form. I wrote a custom paging handler that could fetch and decompress pages on-the-fly. It started with just code and RO data. Then we added RW compression, which meant our handler now had to re-compress evicted pages of RW data that been modified. I came up with the eviction scheme. I even added some tooling to our build system that would analyze hardware traces of typical usage in order to provide input to the linker to organize and optimize the image layout so as to reduce page fetches (thus decompressions) in those common use cases. They've since gone wild with it. I even remember there being discussion on stack compression. I think they are working on a hardware compression/decompression engine these days and integrating with caching.