[darcs-devel] [issue2607] darcs record is too slow with medium/large numbers of files

Simon Michael bugs at darcs.net
Thu Nov 1 18:55:31 UTC 2018


New submission from Simon Michael <simon at joyful.com>:

darcs record seems to run slowly and scale badly when recording large
numbers of files. Here are some times for recording increasing numbers
of added small files (one word each), on a 2013 macbook air, with
darcs-2.14.1:

[11:41:56] recording 100 files: real 0m0.231s
[11:41:56] recording 200 files: real 0m0.443s
[11:41:57] recording 300 files: real 0m0.618s
[11:41:58] recording 400 files: real 0m1.416s
[11:42:00] recording 500 files: real 0m1.932s
[11:42:03] recording 600 files: real 0m3.429s
[11:42:07] recording 700 files: real 0m6.340s
[11:42:15] recording 800 files: real 0m8.051s
[11:42:24] recording 900 files: real 0m10.717s
[11:42:36] recording 1000 files: real 0m15.171s
[11:42:53] recording 2000 files: real 1m58.243s
[11:44:54] recording 3000 files: real 6m17.081s
[11:51:18] recording 4000 files: 
make[1]: *** [test4000] Error 130


darcs --exact-version output begins with:
```
darcs compiled on Sep  4 2018, at 08:40:45

Weak Hash: 7cad985e35ce5c2c37f0cc33e3ca042d567bca55
```

Reproduced on mac mojave and ubuntu.

----------
messages: 20434
nosy: simon
status: unknown
title: darcs record is too slow with medium/large numbers of files

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<http://bugs.darcs.net/issue2607>
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