Mercurial > hg
view tests/test-clone-r.t @ 42406:f385ba70e4af
changelog: optionally store added and removed files in changeset extras
As mentioned in an earlier patch, copies._chain() is used a lot in the
changeset-centric version of pathcopies(). It is expensive because it
needs to look at the manifest in order to filter out copies whose
target file has since been removed. I want to store the sets of added
and removed files in the changeset in order to speed that up. This
patch does the writing part of that. It could easily be a separate
config, but it's currently tied to experimental.copies.write-to since
that's the only real use case (it will also make the {file_*} template
keywords faster, but I doubt that anyone cares enough about those to
write extra metadata for them).
The new information is stored in the changeset extras. Since they're
always subsets of the changeset's "files" list, they're stored as
indexes into that list. I've stored the indexes as stringified ints
separated by NUL bytes. The size of 00changelog.d for the hg repo
increased in size by 0.28% percent (compared to the size with only
copy information in the changesets, which in turn is 0.17% larger than
without copy information). We could store only the delta between the
indexes and we could store them in binary, but the chosen format is
more readable.
We could also have implemented this as a cache outside the
changelog. One advantage of doing it that way is that we would get the
speedups from the {file_*} template keywords also on old
repos. Another advantage is that it we can rewrite the cache if we
find a bug in how we calculate the set of files. A disadvantage is
that it would be more complex. Another is that it would surely use
more space. We already write the copy information to the changeset
extras, so it seems like a small step to also write these file sets.
Differential Revision: https://phab.mercurial-scm.org/D6416
| author | Martin von Zweigbergk <martinvonz@google.com> |
|---|---|
| date | Tue, 14 May 2019 22:19:51 -0700 |
| parents | f1186c292d03 |
| children | ccd76e292be5 |
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$ hg init test $ cd test $ echo 0 >> afile $ hg add afile $ hg commit -m "0.0" $ echo 1 >> afile $ hg commit -m "0.1" $ echo 2 >> afile $ hg commit -m "0.2" $ echo 3 >> afile $ hg commit -m "0.3" $ hg update -C 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo 1 >> afile $ hg commit -m "1.1" created new head $ echo 2 >> afile $ hg commit -m "1.2" $ echo a line > fred $ echo 3 >> afile $ hg add fred $ hg commit -m "1.3" $ hg mv afile adifferentfile $ hg commit -m "1.3m" $ hg update -C 3 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg mv afile anotherfile $ hg commit -m "0.3m" $ hg debugrevlogindex -f 1 afile rev flag size link p1 p2 nodeid 0 0000 2 0 -1 -1 362fef284ce2 1 0000 4 1 0 -1 125144f7e028 2 0000 6 2 1 -1 4c982badb186 3 0000 8 3 2 -1 19b1fc555737 $ hg debugindex adifferentfile rev linkrev nodeid p1 p2 0 7 2565f3199a74 000000000000 000000000000 $ hg debugindex anotherfile rev linkrev nodeid p1 p2 0 8 2565f3199a74 000000000000 000000000000 $ hg debugindex fred rev linkrev nodeid p1 p2 0 6 12ab3bcc5ea4 000000000000 000000000000 $ hg debugindex --manifest rev linkrev nodeid p1 p2 0 0 43eadb1d2d06 000000000000 000000000000 1 1 8b89697eba2c 43eadb1d2d06 000000000000 2 2 626a32663c2f 8b89697eba2c 000000000000 3 3 f54c32f13478 626a32663c2f 000000000000 4 6 de68e904d169 626a32663c2f 000000000000 5 7 09bb521d218d de68e904d169 000000000000 6 8 1fde233dfb0f f54c32f13478 000000000000 $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 9 changesets with 7 changes to 4 files $ cd .. $ for i in 0 1 2 3 4 5 6 7 8; do > echo > echo ---- hg clone -r "$i" test test-"$i" > hg clone -r "$i" test test-"$i" > cd test-"$i" > hg verify > cd .. > done ---- hg clone -r 0 test test-0 adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets f9ee2f85a263 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 1 changesets with 1 changes to 1 files ---- hg clone -r 1 test test-1 adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 1 files new changesets f9ee2f85a263:34c2bf6b0626 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 2 changesets with 2 changes to 1 files ---- hg clone -r 2 test test-2 adding changesets adding manifests adding file changes added 3 changesets with 3 changes to 1 files new changesets f9ee2f85a263:e38ba6f5b7e0 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 3 changesets with 3 changes to 1 files ---- hg clone -r 3 test test-3 adding changesets adding manifests adding file changes added 4 changesets with 4 changes to 1 files new changesets f9ee2f85a263:eebf5a27f8ca updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 4 changesets with 4 changes to 1 files ---- hg clone -r 4 test test-4 adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 1 files new changesets f9ee2f85a263:095197eb4973 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 2 changesets with 2 changes to 1 files ---- hg clone -r 5 test test-5 adding changesets adding manifests adding file changes added 3 changesets with 3 changes to 1 files new changesets f9ee2f85a263:1bb50a9436a7 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 3 changesets with 3 changes to 1 files ---- hg clone -r 6 test test-6 adding changesets adding manifests adding file changes added 4 changesets with 5 changes to 2 files new changesets f9ee2f85a263:7373c1169842 updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 4 changesets with 5 changes to 2 files ---- hg clone -r 7 test test-7 adding changesets adding manifests adding file changes added 5 changesets with 6 changes to 3 files new changesets f9ee2f85a263:a6a34bfa0076 updating to branch default 2 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 5 changesets with 6 changes to 3 files ---- hg clone -r 8 test test-8 adding changesets adding manifests adding file changes added 5 changesets with 5 changes to 2 files new changesets f9ee2f85a263:aa35859c02ea updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 5 changesets with 5 changes to 2 files $ cd test-8 $ hg pull ../test-7 pulling from ../test-7 searching for changes adding changesets adding manifests adding file changes added 4 changesets with 2 changes to 3 files (+1 heads) new changesets 095197eb4973:a6a34bfa0076 (run 'hg heads' to see heads, 'hg merge' to merge) $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 9 changesets with 7 changes to 4 files $ cd .. $ hg clone test test-9 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd test-9 $ hg branch foobar marked working directory as branch foobar (branches are permanent and global, did you want a bookmark?) $ echo file2 >> file2 $ hg add file2 $ hg commit -m "changeset9" $ echo file3 >> file3 $ hg add file3 $ hg commit -m "changeset10" $ cd .. $ hg clone -r 9 -u foobar test-9 test-10 adding changesets adding manifests adding file changes added 6 changesets with 6 changes to 3 files new changesets f9ee2f85a263:7100abb79635 updating to branch foobar 2 files updated, 0 files merged, 0 files removed, 0 files unresolved