Mercurial > hg > mercurial-crew-with-dirclash
annotate comparison.txt @ 917:7f3f55903496
Fix hg clone race with writer
Most read operations in hg don't need locks because we order reads and
writes for consistency. Clone is an exception to this as we're copying
entire file histories and could end up with more file history copied
than we have commits.
For now, make clone take a lock on the source repo. Non-hardlinked
clone should eventually be changed to use lockless pull.
author | mpm@selenic.com |
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date | Tue, 16 Aug 2005 14:53:47 -0800 |
parents | 17e66e1a0382 |
children | 2073e5a71008 |
rev | line source |
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58
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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1 Mercurial git BK (*) |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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2 storage revlog delta compressed revisions SCCS weave |
139 | 3 storage naming by filename by revision hash by filename |
58
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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4 merge file DAGs changeset DAG file DAGs? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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5 consistency SHA1 SHA1 CRC |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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6 signable? yes yes no |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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7 |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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8 retrieve file tip O(1) O(1) O(revs) |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
diff
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9 add rev O(1) O(1) O(revs) |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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10 find prev file rev O(1) O(changesets) O(revs) |
139 | 11 annotate file O(revs) O(changesets) O(revs) |
58
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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12 find file changeset O(1) O(changesets) ? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
diff
changeset
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13 |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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14 checkout O(files) O(files) O(revs)? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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15 commit O(changes) O(changes) ? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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16 6 patches/s 6 patches/s slow |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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17 diff working dir O(changes) O(changes) ? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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18 < 1s < 1s ? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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19 tree diff revs O(changes) O(changes) ? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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20 < 1s < 1s ? |
139 | 21 hardlink clone O(files) O(revisions) O(files) |
22 | |
23 find remote csets O(log new) rsync: O(revisions) ? | |
24 git-http: O(changesets) | |
58
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A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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25 pull remote csets O(patch) O(modified files) O(patch) |
139 | 26 |
58
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A quick set of comparisons between hg, git, and bk
mpm@selenic.com
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27 repo growth O(patch) O(revisions) O(patch) |
139 | 28 kernel history 300M 3.5G? 250M? |
58
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A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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29 lines of code 2500 6500 (+ cogito) ?? |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
diff
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30 |
2ab801e0ea9f
A quick set of comparisons between hg, git, and bk
mpm@selenic.com
parents:
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31 * I've never used BK so this is just guesses |