Log Message:
py-mercurial: update to 6.8.1.

If you're using Mercurial with Python 3.12.5, you need this version.

Mercurial 6.8.1

    Python 3.12: fix an issue between threading and demandimport
    rhg: expand user and environment variable in paths to ignore in config and
        includes

    win32mbcs extension: fix an encoding issue

Mercurial 6.8

As usual, a *lot* of patches don't make it to this list.

New Features or performance improvements

    Phases have been reworked to improve their general performance
        revset: stop serializing node when using "%ln"
        phases: convert remote phase root to node while reading them
        phases: use revision number in new_heads
        phases: use revision number in analyze_remote_phases

        phases: stop using repo.set in remotephasessummary

        phases: move RemotePhasesSummary to revision number

        phases: use revision number in _pushdiscoveryphase
        phases: introduce a performant efficient way to access revision in a set
        phases: rework the logic of _pushdiscoveryphase to bound complexity
    The Rust working copy code is being used by more places now:
        matchers: support patternmatcher in rust
        dirstate: remove the python-side whitelist of allowed matchers

    stream-clone: disable gc for _entries_walk duration
    stream-clone: disable gc for the initial section for the v3 format
    postincoming: avoid computing branchhead if no report will be posted
    stream-clone: disable gc for the entry listing section for the v2 format
    perf: allow profiling of more than one run
    perf: run the gc before each run
    perf: start recording total time after warming
    perf: clear vfs audit_cache before each run

    outgoing: rework the handling of the missingroots case to be faster
    outgoing: add a simple fastpath when there is no common
    tags-cache: skip the filternode step if we are not going to use it
    tags-cache: directly operate on rev-num warming hgtagsfnodescache
    tags-cache: directly perform a monimal walk for hgtagsfnodescache warming

New Experimental Features

    Introduce a new experimental branch cache "v3":
        branchcache: add more test for the logic around obsolescence and branch heads
        branchcache: skip entries that are topological heads in the on disk file
        branchcache: add a "pure topological head" fast path
        branchcache: allow to detect "pure topological case" for branchmap

Bug Fixes

    rust: use cpython 0.7.2 crate to add support for Python 3.12
    perf-stream-locked-section: actually use v1 generation when requested
    perf-stream-locked-section: fix the call to the v3 generator
    perf-stream-locked-section: advertise the right version key in the help
    stream: in v3, skip the "size" fast path if the entries have some \ 
unknown size
    stream-clone: stop getting the file size of all file in v3
    streamclone: stop listing files for entries that have no volatile files
    perf-stream-consume: use the source repository config when applying
    bundle: do no check the changegroup version if no changegroup is included
    perf: create the temporary target next to the source in stream-consume
    bundlespec: fix the "streamv2" and "streamv3-exp" variant
    push: rework the computation of fallbackheads to be correct
    profiler: flush after writing the profiler output
    base-revsets: use an author that actually exercises a lot of changesets
    hgrc: search XDG_CONFIG_HOME on mac
    clonebundles: add missing newline to legacy response
    narrow: add a test for linkrev computation done during widen
    Multiple fixes to guard against mmap issues
    portability: fix build on Solaris-derived systemd

Miscellaneous

    obsolete: quote the feature name