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| author |  Joey Hess <joey@kitenet.net> | 2011-11-15 23:28:01 -0400 |
|---|---|---|
| committer | Joey Hess <joey@kitenet.net> | 2011-11-15 23:28:01 -0400 |
| commit | 21a925dcf1ebe088b5c64da0ce159ffb6d535f04 (patch) | |
| tree | df3851985ef279a81ceddd2f5e96fcacc30a7df9 /Annex | |
| parent | 922e9af5281b01709e5fa631ebe048c7da7c4d71 (diff) | |
merge: Now runs in constant space.
Before, a merge was first calculated, by running various actions that
called git and built up a list of lines, which were at the end sent
to git update-index. This necessarily used space proportional to the size
of the diff between the trees being merged.
Now, lines are streamed into git update-index from each of the actions in
turn.
Runtime size of git-annex merge when merging 50000 location log files
drops from around 100 mb to a constant 4 mb.
Presumably it runs quite a lot faster, too.
Diffstat (limited to 'Annex')
| -rw-r--r-- | Annex/Branch.hs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Annex/Branch.hs b/Annex/Branch.hs index 20134003d..ae33f66cf 100644 --- a/Annex/Branch.hs +++ b/Annex/Branch.hs @@ -56,7 +56,8 @@ index g = gitAnnexDir g </> "index" - and merge in changes from other branches. -} genIndex :: Git.Repo -> IO () -genIndex g = Git.UnionMerge.ls_tree fullname g >>= Git.UnionMerge.update_index g +genIndex g = Git.UnionMerge.update_index_via g + [Git.UnionMerge.ls_tree fullname g] {- Runs an action using the branch's index file. -} withIndex :: Annex a -> Annex a |