# git svn dcommit -n rebuilds revmap w/ 1.5.4.rc0.1187.gc1e8d 2 messages from 2007-12-19 to 2007-12-20. Participants: Bill Priest, Eric Wong. Thread: https://gitlist.dev/t/11360 ## Bill Priest, 2007-12-19 19:04 Subject: git svn dcommit -n rebuilds revmap w/ 1.5.4.rc0.1187.gc1e8d Message-ID: <784879.48443.qm@web55007.mail.re4.yahoo.com> URL: https://gitlist.dev/e/784879.48443.qm%40web55007.mail.re4.yahoo.com ``` All, I had been experiencing commit slow downs (> 15 seconds) so I decided to test it out on 1.5.4.rc0. I use committed a file and it too ~5 seconds which is slower than it used to be but much better (I'll need to do an apples to apples test to quantify it better; e.g. check in the same file w/ a repository in the same state). In the course of using 1.5.4.rc0 I did a git svn dcommit -n and observed the following: > git svn dcommit -n Rebuilding .git/svn/mss_release_2.1B3/.rev_map.59aec714-b326-0410-a24e-830352df6fdd ... r2918 = 992aa04a75fffdbdb65bae815905f96d5e3ef6bd r2920 = e68e7f5aead05fc9e7a151e95f43b8283b0ed670 Done rebuilding .git/svn/mss_release_2.1B3/.rev_map.59aec714-b326-0410-a24e-830352df6fdd Committing to svn://lucille/var/lib/svnrepos/svnMSS/branches/mss_release_2.1B3 ... diff-tree b7cc4c3d32478277c1cdf13e3abdc9dd4a225826~1 b7cc4c3d32478277c1cdf13e3abdc9dd4a225826 diff-tree 0bbb656391f5a888d07c98ccce01a4c753ef4997~1 0bbb656391f5a888d07c98ccce01a4c753ef4997 > git svn dcommit -n Committing to svn://lucille/var/lib/svnrepos/svnMSS/branches/mss_release_2.1B3 ... diff-tree b7cc4c3d32478277c1cdf13e3abdc9dd4a225826~1 b7cc4c3d32478277c1cdf13e3abdc9dd4a225826 diff-tree 0bbb656391f5a888d07c98ccce01a4c753ef4997~1 0bbb656391f5a888d07c98ccce01a4c753ef4997 > git --version git version 1.5.4.rc0.1187.gc1e8d Notice the Rebuilding doesn't seem to be honoring the -n "dry run" switch. I'm not sure of the implications. Is this something that I should worry about the .revmap being out of sync w/ what has actually been dcommit'ed? Bill PS. The new path relative status is nice. ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ``` ## Eric Wong, 2007-12-20 06:55 Subject: Re: git svn dcommit -n rebuilds revmap w/ 1.5.4.rc0.1187.gc1e8d Message-ID: <20071220065513.GC17787@muzzle> URL: https://gitlist.dev/e/20071220065513.GC17787%40muzzle In-Reply-To: <784879.48443.qm@web55007.mail.re4.yahoo.com> ``` Bill Priest wrote: > All, > I had been experiencing commit slow downs (> 15 > seconds) so I decided to test it out on 1.5.4.rc0. I > use committed a file and it too ~5 seconds which is > slower than it used to be but much better (I'll need > to do an apples to apples test to quantify it better; > e.g. check in the same file w/ a repository in the > same state). In the course of using 1.5.4.rc0 I did a > git svn dcommit -n and observed the following: Are these slowdowns for commits using git-commit? or for using git-svn dcommit? The new rev_map format is very space-efficient, but I haven't optimized for performance, yet. It seems to do well enough on Linux that I don't notice any performance penalty/improvement. I'm also network I/O bound for real-world SVN usage, too. I haven't benchmarked .rev_map much, but the binary search could certainly be optimized to avoid extra seeks if needed. > > git svn dcommit -n > Rebuilding > .git/svn/mss_release_2.1B3/.rev_map.59aec714-b326-0410-a24e-830352df6fdd > ... > r2918 = 992aa04a75fffdbdb65bae815905f96d5e3ef6bd > r2920 = e68e7f5aead05fc9e7a151e95f43b8283b0ed670 > Done rebuilding > .git/svn/mss_release_2.1B3/.rev_map.59aec714-b326-0410-a24e-830352df6fdd > Committing to > svn://lucille/var/lib/svnrepos/svnMSS/branches/mss_release_2.1B3 > ... > diff-tree b7cc4c3d32478277c1cdf13e3abdc9dd4a225826~1 > b7cc4c3d32478277c1cdf13e3abdc9dd4a225826 > diff-tree 0bbb656391f5a888d07c98ccce01a4c753ef4997~1 > 0bbb656391f5a888d07c98ccce01a4c753ef4997 > > git svn dcommit -n > Committing to > svn://lucille/var/lib/svnrepos/svnMSS/branches/mss_release_2.1B3 > ... > diff-tree b7cc4c3d32478277c1cdf13e3abdc9dd4a225826~1 > b7cc4c3d32478277c1cdf13e3abdc9dd4a225826 > diff-tree 0bbb656391f5a888d07c98ccce01a4c753ef4997~1 > 0bbb656391f5a888d07c98ccce01a4c753ef4997 > > git --version > git version 1.5.4.rc0.1187.gc1e8d > > Notice the Rebuilding doesn't seem to be honoring the > -n "dry run" switch. > > I'm not sure of the implications. Is this something > that I should worry about the .revmap being out of > sync w/ what has actually been dcommit'ed? --dry-run only means that it won't write to the SVN repository. There's no need to worry about stuff that's out of sync, .rev_map only stores information about commits already made to SVN, and is more of an internal cache for most repositories. All .rev_map and .rev_db files it replaces are safely deletable unless you're using noMetadata or useSvmProps with git-svn. -- Eric Wong ```