Is tar -cjf deterministic?

[James R. Phillips]

I've noticed more than once that when I recreate a bzip2'ed tar archive on
cygwin, the file length is slightly different.  Yet it expands into the same
directory tree (as determined by recursive diff).

Is there something nondeterministic about tar and bzip2 on cygwin?  If so, is
it unique to cygwin?

Just wondering.


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