git-svn performance

Hi,

I'm currently migrating an SVN repository to Git using git-svn (Git for Windows 1.8.3-preview20130601), and I'm experiencing severe performance problems with "git svn fetch". Commits to the SVN "trunk" are fetched very fast (a few seconds or so per SVN revision), but commits to some branches ("hotfix" branches) are currently taking about 9 minutes per revision. I fear that the time per these commits is increasing and that indeed the migration might not be finishable at all.

For the commits that take such a long time, git-svn always outputs lots of warnings about ignored SVN cherry-picks, and it tells me it can't find a revmap for the path being imported. (See [1].)

AFAICS, the offending commits take place on some branches that include a lot of manually merged ("SVN cherry-picked") revisions. Git-svn seems to be checking something (though I don't know what) that makes importing these revisions really slow. And it repeats this for every revision on these branches with increasing work to do.

Is there anything I can do to speed this up? (I already tried increasing the --log-window-size to 500, didn't have any effect.)

Thank you, best regards, Fabian

[1]
        M       foo/bar/XXX.xml
        M       foo/bar/YYY.xml
W:svn cherry-pick ignored (/branches/frob:6940-7068) - missing 12
commit(s) (eg abeaece820ceae44ebf2c06011cf43bbcbf4b1ce)
W:svn cherry-pick ignored (/branches/feature:3316-4798,4811,4827) -
missing 10 commit(s) (eg e255fff14ab1e581f21671ca8b36c0747869cf8c)
W:svn cherry-pick ignored
(/hotfixes/ZZZ.159:2131,2133,2145-2146,2148,2169) - missing 10
commit(s) (eg e04b0326c998f0611c18144b3ed8f686d3b52f4c)
W:svn cherry-pick ignored
(/hotfixes/ZZZ.333:4536,4610-4611,4625,4665,4669,4685,4713,4745,4785,4788,4908-4917,4920,4933-4944,4955,5003,5103,5174,5222,5227,
5261,5267,5306,5310,5321,5360,5416,5467,5501,5508,5599-5614,5650-5651,5757,5761-5762,5764,5778-5779,5784,5811,5814,5819,5823,5825,5836-5838,5860,5862,5873,5889,
5910,5924,5948) - missing 137 commit(s) (eg
9daec24cbdf55200d2cdfb0cd6b3f10485e296ac)
C:\Program Files (x86)\Git\bin\perl.exe: *** WFSO timed out
W:svn cherry-pick ignored (/hotfixes/ZZZ.333.39:5696,5847) - missing
84 commit(s) (eg 9daec24cbdf55200d2cdfb0cd6b3f10485e296ac)
W:svn cherry-pick ignored (/hotfixes/AAA:5905,6095) - missing 119
commit(s) (eg 9daec24cbdf55200d2cdfb0cd6b3f10485e296ac)
W:svn cherry-pick ignored (/hotfixes/BBB_1.1:6971) - missing 198
commit(s) (eg 9daec24cbdf55200d2cdfb0cd6b3f10485e296ac)
W:svn cherry-pick ignored
(/hotfixes/CCC:6134,6164,6168,6174,6206,6211,6237,6239,6244-6245,6250,6257,6269,6271,6276,6289-6292,6294,6296,6301-6302,6313,6315-6316,6329,6333,6379,6383,6394,6405,6411,6456,6478,6483,6491,6519,6537,6557)
- missing 194 commit(s) (eg 9daec24cbdf55200d2cdfb0cd6b3f10485e296ac)
W:svn cherry-pick ignored (/hotfixes/DDD:7635) - missing 1 commit(s)
(eg 6a3ba817635eb3a9411a307924dec393311d93be)
W:svn cherry-pick ignored
(/hotfixes/EEE_1.2:7786,7794,7797,7803,7829-7830,7843,7886,7889,7933,7937,7949,7953)
- missing 80 commit(s) (eg e78b1bc68f7a9b041588a39f3fa5e1a61f98942b)
W:svn cherry-pick ignored
(/hotfixes/EEE_1.3:8159,8170,8173-8174,8177,8181-8182,8185,8187,8194-8195,8201,8203,8206,8251,8255,8257,8259-8262,8265,8280,8286,8294,8296,8304-8305,8312,8318,8323,8327,8363,8387-8388,8390,8422-8423,8432,8446,8536-8537,8548-8549,8556,8559,8566,8569,8572,8578,8597-8598,8602,8617,8619,8655,8687,8720)
- missing 104 commit(s) (eg 33febd4591f42a9d871ba330432840917b157f9e)
W:svn cherry-pick ignored
(/hotfixes/EEE_1.4:8766,8768,8770,8777-8779,8795-8796,8802-8809,8812-8814,8816-8817,8820,8823,8825,8827,8831,8836,8841,8845,8848-8852,8854-8855,8866,8868-8869,8871-8873,8875-8878,8880,8888,8892,8911-8912,8917-8918,8946,8956-8957,8964,8984,8994,9003,9008,9011,9029,9038,9040,9046-9048,9055,9086,9101,9108,9111,9113,9124,9129,9133,9138-9139,9150,9152,9154,9156,9172,9174,9188-9189,9208,9211,9217)
- missing 44 commit(s) (eg 0621fb44de682650d762c707b102bc2472c088f8)
W:svn cherry-pick ignored
(/hotfixes/EEE_1.5:9412,9421,9430,9433-9436,9439,9441,9449,9459,9468,9529,9548,9561,9568,9605-9606,9612,9614,9617,9628,9630-9631,9637,9687,9807)
- missing 41 commit(s) (eg 1bd1a9b72336bf4d3839a00348b7f2a52368c16c)
W:svn cherry-pick ignored
(/trunk:9852-9853,9857,9859,9862,9868,9872,9876,9879,9890,9895,9926-9927,9933,9953,9956,9960-9962)
- missing 60 commit(s) (eg 3322e7ffc6ab49181976d9e94c91a4556951f38a)
Couldn't find revmap for https://the-svn-server/svn/something/trunk/foo
r9963 = 597df48cb830825f9029d1cfdf45df024d7fd3dd (refs/remotes/EEE_1.6)