relnotes: add 6.7.2

relnotes/6.7

@@ -1,87 +1,98 b''
+= Mercurial 6.7.2 =
+
+Exceptional release following a large performance regression when cloning.
+
+We are setting up automated benchmarks to reduce the likelihood of regressions
+of the sort from happening in the future.
+
+ * phases: avoid a potentially costly dictionary interation in some case
+ * phases: update the phase set as we go during retract boundary
+ * bundle2: make the "hgtagsfnodes" part advisory
+
 = Mercurial 6.7.1 =
 
 Exceptional release following a crash found in delta code that can be triggered
 with complex repository shapes.
 
  * delta-search: fix crash caused by unbound variable
  * sshpeer: fix path when handling invalid url exception
  * subrepo: fix normalizing paths with scheme
 
 = Mercurial 6.7 =
 
 As usual, a *lot* of patches don't make it to this list.
 
 == New Features ==
 
  * JSON templates can now use structured diffstat data
  * Support rhg status --rev --rev
  * The index for REVLOGv1 now has a Rust implementation
  * Improved `hg censor`'s output
  * censor: add a command flag to skip the head checks
  * censor: accept multiple revision in a single call
  * usage: add a `usage.repository-role` config
  * branchmap: use mmap for faster revbranchcache loading
  * crecord: enable search hotkeys (issue6834)
  * hg-core: separate timestamp and extra methods
  * annotate: limit output to range of lines
  * unbundle: faster computation of changed heads
  * Large improvements of some of the phases code (23950e39281f)
  * rust-filepatterns: export glob_to_re function
 
 == New Experimental Features ==
 
  * Introduce `hg admin::chainsaw-update` for automation and *advanced* users
 
 == Bug Fixes ==
 
  * templatekw: fix inconsistency of diffstat with diff.merge
  * The endless stream of Python 3 cleanups continues
  * Improved setup.py robustness
  * Improved test suite robustness
  * add: don't attempt to add back removed files unless explicitly listed
  * statprof: handle `lineno == None` in more cases
  * rust: fix cargo doc for hg-cpython
  * rust-python-index: don't panic on a corrupted index when calling from Python
  * debugindexstats: handle the lack of Rust support better
  * matchers: use correct method for finding index in vector
  * narrow: strip trailing `/` from manifest dir before matching it
  * cext: fix potential memory leaks of list items appended with PyList_Append
  * doc: document that labels must have a dot in them to have an effect
  * debugformat: fix formatting for compression level
  * obsutil: sort metadata before comparing in geteffectflag()
  * crecord: drop calls to `curses.endwin()`
  * rust-index: don't use mutable borrow for head-diff computation
  * rust-index: don't use mutable borrow to computed filtered heads
 
 
 == Backwards Compatibility Changes ==
 
 Users of the Rust extensions and/or `rhg` should be aware that the new Rust
 index can result in a performance degradation for push/pull on repositories
 *not* using `persistent-nodemap` (see `hg help config.format.use-persistent-nodemap`).
 
 If this is something that matters to you, please reach out to us as this is not
 an insurmountable obstacle. This is a choice base on the assumption that
 there are few people in this situation and our time should be spent on more
 pressing matters.
 
 == Internal API Changes ==
 
  * 62913:498017baa34b "cleanup: remove some code scheduled to be removed after 5.9"
  * 62914:88ef80210d67 "cleanup: drop `dirstate.is_changing_parent` deprecated since 6.5"
  * 62915:591845f89ada "cleanup: drop `path.pushloc` deprecated since 6.5"
  * 62916:d8f65fc72e7b "cleanup: drop deprecated config attribute on the revlog class"
  * 62917:5c9c41273367 "cleanup: turn `pathsuboption` deprecation warning into an error"
  * 62918:7b837fabc990 "cleanup: turn `wrappedfunction` deprecation warning into an error"
  * 62919:eda075d7b2ac "cleanup: turn `wrapfunction` deprecation warning into an error"
  * 62920:c845479fc64d "cleanup: drop the `bytes` compatibility for attribute related function"
  * 63464:dcaa2df1f688 "changelog: never inline changelog"
  * 63465:a93e52f0b6ff "changelog: disallow delayed write on inline changesets"
  * 63825:79cd29d598af "dirstate: make the `transaction` argument of `setbranch` mandatory"
 
 == Miscellaneous ==
 
  * perf: support --template on perf::phases
  * perf: add a --as-push option to perf::unbundle
  * debug: add a debug::unbundle command that simulate the unbundle from a push
  * Lots of refactorings to prepare for performance improvements and remove tech debt