Sort by file extension

[tobia]

This is an old trick used by many archivers of ages past: first expand the source directory into a huge array of files; then sort them using a heuristic that places similar files close together, improving compressor performance.

The heuristic I remember was sorting by extension and then by size (algorithmically: first sort by size and then stable sort by extension.)

The reason is that two small .h files will be more likely to be similar to each other than a small and a big .h files, let alone a .h file and a .so file.

[jpakkane]

Thanks for the suggestions. I'll try to have some time to work on this in the future.