The second item in the tuple returned from `__reduce__()` is a tuple of
arguments to supply to path constructor. Previously we returned the `parts`
tuple here, which entailed joining, parsing and normalising the path
object, and produced a compact pickle representation.

With this patch, we instead return a tuple of paths that were originally
given to the path constructor. This makes pickling much faster (at the
expense of compactness). By also omitting to `sys.intern()` the path parts,
we slightly speed up path parsing/normalization more generally.

Add a few more simple test cases, like non-anchored paths. Remove misplaced
and indirect test that pickling doesn't change the `stat()` value.

…13243)

Add a few more simple test cases, like non-anchored paths. Remove misplaced
and indirect test that pickling doesn't change the `stat()` value.

…ng (python#113243)

Add a few more simple test cases, like non-anchored paths. Remove misplaced
and indirect test that pickling doesn't change the `stat()` value.

…ng (python#113243)

Add a few more simple test cases, like non-anchored paths. Remove misplaced
and indirect test that pickling doesn't change the `stat()` value.

…ng (python#113243)

Add a few more simple test cases, like non-anchored paths. Remove misplaced
and indirect test that pickling doesn't change the `stat()` value.

The second item in the tuple returned from `__reduce__()` is a tuple of arguments to supply to path constructor. Previously we returned the `parts` tuple here, which entailed joining, parsing and normalising the path object, and produced a compact pickle representation.

With this patch, we instead return a tuple of paths that were originally given to the path constructor. This makes pickling much faster (at the expense of compactness).

It's worth noting that, in the olden times, pathlib performed this parsing/normalization up-front in every case, and so using `parts` for pickling was almost free. Nowadays pathlib only parses/normalises paths when it's necessary or advantageous to do so (e.g. computing a path parent, or iterating over a directory, respectively).