When attempting to use SquashFS multi-threaded per-cpu decompressor, certain memory increase was observed as expected. Since xz decompression is being used, changing the mode from XZ_PREALLOC to XZ_DYNALLOC would reduce the memory footprint, while maintaining our performance gain from using SquashFS multi-threaded decompressor gained in our system. I would like to seek your opinion to see if back then XZ_PREALLOC was chosen for a specific reason that switching to XZ_DYNALLOC would have potential...