Optimize pathlib.Path.absolute() #112727

The implementation of pathlib.Path.absolute() can call with_segments() with multiple arguments; the resulting path object will be internally unjoined and unparsed, making str(path.absolute()) slow, amongst other things.

absolute() already has most of the information it needs to produce paths that are pre-joined, and either pre-parsed (if the input has tail segments) or pre-stringified (otherwise). This could provide a tasty speedup.

Linked PRs

• GH-112727: Speed up pathlib.Path.absolute() #112728