Mercurial > hg
view relnotes/5.4 @ 51108:0250e45040f1
revlog: add a small cache of unfiltered chunk
This can provides a massive boost to the reading of multiple revision and the
computation of a valid delta chain.
This greatly help operation like `hg log --patch`, delta computation (helping
pull/unbundle), linkrev adjustment (helping copy tracing).
A first round of benchmark for `hg log --patch --limit 1000` shows improvement
in the 10-20% range on "small" repository like pypy or mercurial and large
improvements (about 33%) for more complex ones like netbeans and mozilla's.
These speeds up are consistent with the improvement to `hg pull` (from a server
sending poor deltas) I saw benchmarking this last year. Further benchmark will
be run during the freeze.
I added some configuration in the experimental space to be able to further test
the effect of various tuning for now. This feature should fit well in the
"usage/resource profile" configuration that we should land next cycle.
When it does not provides a benefit the overhead of the cache seem to be around
2%, a small price for the big improvement. In addition I believe we could shave
most of this overhead with a more efficent lru implementation.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 27 Oct 2023 08:54:41 +0200 |
parents | f445a4f7e8a7 |
children |
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== New Features == * `hg purge`/`hg clean` can now delete ignored files instead of untracked files, with the new -i flag. * `hg pull` now has a `--confirm` flag to prompt before applying changes. Config option `pull.confirm` is also added for that. * `hg log` now defaults to using an '%' symbol for commits involved in unresolved merge conflicts. That includes unresolved conflicts caused by e.g. `hg update --merge` and `hg graft`. '@' still takes precedence, so what used to be marked '@' still is. * New `conflictlocal()` and `conflictother()` revsets return the commits that are being merged, when there are conflicts. Also works for conflicts caused by e.g. `hg graft`. * `hg copy --forget` can be used to unmark a file as copied. * The `format.revlog-compression` configuration entry now accept a list. The first available option will be used. for example setting:: [format] revlog-compression=zstd, zlib Will use `zstd` compression for new repositories is available, and will simply fall back to `zlib` if not. * `hg debugmergestate` output is now templated, which may be useful e.g. for IDEs that want to help the user resolve merge conflicts. == New Experimental Features == * `hg copy` now supports a `--at-rev` argument to mark files as copied in the specified commit. It only works with `--after` for now (i.e., it's only useful for marking files copied using non-hg `cp` as copied). * Use `hg copy --forget --at-rev REV` to unmark already committed copies. == Bug Fixes == * Fix server exception when concurrent pushes delete the same bookmark * Prevent pushes of divergent bookmarks (foo@remote) * The push error "remote repository changed while pushing - please try again" now only happens when a concurrent push changed related heads (instead of when a concurrent pushed any revision). == Backwards Compatibility Changes == * When `hg rebase` pauses for merge conflict resolution, the working copy will no longer have the rebased node as a second parent. You can use the new `conflictparents()` revset for finding the other parent during a conflict. * `hg rebase` now accepts repeated `--source` and `--base` arguments. For example, `hg rebase --source 'A + B'` is equivalent to `hg rebase --source A --source B`. This is a backwards-incompatible change because it will break overriding an alias `myrebase = rebase --source A` by `hg myrebase --source B` (it will now rebase `(A + B)::` instead of `B::`). * `hg recover` does not verify the validity of the whole repository anymore. You can pass `--verify` or call `hg verify` if necessary. * `hg debugmergestate` output format changed. Let us know if that is causing you problems and we'll roll it back. * Resolved merge conflicts are now cleared by `hg commit` even if the working copy has no changes. == Internal API Changes == * The deprecated `ui.progress()` has now been deleted. Please use `ui.makeprogress()` instead. * `hg.merge()` now takes a `ctx` instead of the previous `repo` and `node` arguments. * `hg.merge()` has lost its `abort` argument. Please call `hg.abortmerge()` directly instead. * `hg.merge()` has lost its `mergeforce` argument. It should have only ever been called with the same value as the `force` argument. * The `*others` argument of `cmdutil.check_incompatible_arguments()` changed from being varargs argument to being a single collection.