[PATCH] Merging identical changes from another branch
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[PATCH] Merging identical changes from another branch
From: Michael A Fetterman <Michael.Fetterman@cl.cam.ac.uk>
The issue comes up when a local uncommitted *new* file (i.e. not in the
current manifest) is being merged with an identical file from a branch.
Since the file is not in the current manifest (it's either in the
current "to-be-added" list, or in the "unknown" state), there's no
(local) node from which to create a mergepoint.
manifest hash:
4e64ce654a6473524789a97bbaf8bff61b4343af
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Mercurial git BK (*)
storage revlog delta compressed revisions SCCS weave
storage naming by filename by revision hash by filename
merge file DAGs changeset DAG file DAGs?
consistency SHA1 SHA1 CRC
signable? yes yes no
retrieve file tip O(1) O(1) O(revs)
add rev O(1) O(1) O(revs)
find prev file rev O(1) O(changesets) O(revs)
annotate file O(revs) O(changesets) O(revs)
find file changeset O(1) O(changesets) ?
checkout O(files) O(files) O(revs)?
commit O(changes) O(changes) ?
6 patches/s 6 patches/s slow
diff working dir O(changes) O(changes) ?
< 1s < 1s ?
tree diff revs O(changes) O(changes) ?
< 1s < 1s ?
hardlink clone O(files) O(revisions) O(files)
find remote csets O(log new) rsync: O(revisions) ?
git-http: O(changesets)
pull remote csets O(patch) O(modified files) O(patch)
repo growth O(patch) O(revisions) O(patch)
kernel history 300M 3.5G? 250M?
lines of code 2500 6500 (+ cogito) ??
* I've never used BK so this is just guesses