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comparison.txt
author mpm@selenic.com
Thu, 30 Jun 2005 10:07:50 -0800
changeset 535 fba26990604a
parent 139 17e66e1a0382
child 1308 2073e5a71008
permissions -rw-r--r--
Deal with failed clone/transaction interaction -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Deal with failed clone/transaction interaction > What is happening is that something in the transaction machinery is > causing the directory to be completely recreated. The transaction gets rolled back by its destructor. This is critical so it happens whenever an exception occurs that unwinds the stack. Unfortunately, what's happening with clone is we're trying to delete the directory during exception propagation. And a reference to the transaction is held in the exception backtrace stack frames so it still exists until the exception is completely resolved. So there's no way to do the directory delete inside the exception handling cleanly. But we can handle it similarly to the transaction itself: use an object with a destructor. manifest hash: fc38550a20d64d08333f256bbedc312493c1390b -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (GNU/Linux) iD8DBQFCxDT2ywK+sNU5EO8RAjikAJ0Tej56rAutxQDfYzVbFGtT1sEC5ACgmVds /fwdQyHn+FwshugqXLemUaM= =3f78 -----END PGP SIGNATURE-----
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2ab801e0ea9f A quick set of comparisons between hg, git, and bk
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                    Mercurial      git                     BK (*)
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storage             revlog delta   compressed revisions    SCCS weave
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17e66e1a0382 Minor updates to comparison
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storage naming      by filename    by revision hash        by filename
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merge               file DAGs      changeset DAG           file DAGs?
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consistency         SHA1           SHA1                    CRC
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signable?           yes            yes                     no
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retrieve file tip   O(1)           O(1)                    O(revs)













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add rev             O(1)           O(1)                    O(revs)













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find prev file rev  O(1)           O(changesets)           O(revs)








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annotate file       O(revs)        O(changesets)           O(revs)








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find file changeset O(1)           O(changesets)           ?













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checkout            O(files)       O(files)                O(revs)?













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commit              O(changes)     O(changes)              ?













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                    6 patches/s    6 patches/s             slow













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diff working dir    O(changes)     O(changes)              ?













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                    < 1s           < 1s                    ?













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tree diff revs      O(changes)     O(changes)              ?













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                    < 1s           < 1s                    ?








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hardlink clone      O(files)       O(revisions)            O(files)













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find remote csets   O(log new)     rsync: O(revisions)     ?













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                                   git-http: O(changesets)








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pull remote csets   O(patch)       O(modified files)       O(patch)








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repo growth         O(patch)       O(revisions)            O(patch)








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 kernel history     300M           3.5G?                   250M?








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A quick set of comparisons between hg, git, and bk



mpm@selenic.com


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lines of code       2500           6500 (+ cogito)         ??













2ab801e0ea9f
A quick set of comparisons between hg, git, and bk



mpm@selenic.com


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2ab801e0ea9f
A quick set of comparisons between hg, git, and bk



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* I've never used BK so this is just guesses















mercurial-crew-with-dirclash