Re: Fw: Curiosity

João Victor Bonfim  [off-list ref] writes:

quoted

I suspect that for most algorithms and their implementations, this would

not result in repeatable "recompressed" results. Thus the checked-out

files might be different every time you checked them out. :(

How or why?

Sincere question.

Two immediate things that come to my mind are lossy compression
algorithms (jpeg pictures?) and compressors that do not necessarily
produce bit-for-bit identical results (e.g. gzip by default embeds
timestamp unless explicitly told not to from a command line option).