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Size: 1294
Comment:
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Size: 1885
Comment: linux-2.6 test results
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| Deletions are marked like this. | Additions are marked like this. |
| Line 14: | Line 14: |
| ||<-5> || ||<-5> Linux kernel (http://www.kernel.org/hg/index.cgi/linux-2.6/) - 181609 revisions || || || total size (kb) || relative size <<BR>> (plain == 1) || 00manifest.d size (kb) || 00manifest.d relative size <<BR>> (plain == 1) || || plain || 1418724 || 1.00 || 895624 || 1.00 || || zlibstream applied || 1343864 || 0.95 || 874396 || 0.98 || || plain,<<BR>>shrinked manifest || 752248 || 0.53 || 231112 || 0.26 || || zlibstream applied,<<BR>>shrinked manifest || 681380 || 0.48 || 211912 || 0.24 || |
Compressing revlog delta chunks reusing the zlib stream
Current revlog format compresses delta chunks separately from each other. The idea is using the same compression object for a snapshot and its delta chunks, simply sync-flushing the zlib stream for each chunk.
Test results
Mercurial crew (http://hg.intevation.org/mercurial/crew) - 10395 revisions |
||||
|
total size (kb) |
relative size |
00manifest.d size (kb) |
00manifest.d relative size |
plain |
25708 |
1.00 |
8632 |
1.00 |
zlibstream applied |
18400 |
0.72 |
4104 |
0.48 |
plain, |
21740 |
0.85 |
4668 |
0.54 |
zlibstream applied, |
16856 |
0.66 |
2560 |
0.30 |
|
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Linux kernel (http://www.kernel.org/hg/index.cgi/linux-2.6/) - 181609 revisions |
||||
|
total size (kb) |
relative size |
00manifest.d size (kb) |
00manifest.d relative size |
plain |
1418724 |
1.00 |
895624 |
1.00 |
zlibstream applied |
1343864 |
0.95 |
874396 |
0.98 |
plain, |
752248 |
0.53 |
231112 |
0.26 |
zlibstream applied, |
681380 |
0.48 |
211912 |
0.24 |
Patch queue
The code currently doesn't properly sets and checks the requires file, and the changes on revlog chunks take effect immediately on any new revisions: take care when running this on existing repositories!
http://bitbucket.org/wbruna/hg-zlibstream/
Mailing list threads
http://www.selenic.com/pipermail/mercurial-devel/2010-February/018564.html