'bzr branch' over svn uses a lot of RAM

[Selene ToyKeeper]

While converting a remote svn repo to bzr, I noticed bzr was using a lot of RAM. The command I ran was:

  bzr branch http://svn.gnome.org/svn/sawfish/

It took 2h41m and 558 MiB RAM. After it completed, the directory used 423 MiB on disk, 108 MiB of which was in .bzr/ .
Branching locally without a shared repository took 4 minutes and 130 MiB RAM. So, the behavior is much better without svn.

Thinking it might be fixed upstream, I tried the latest versions of bzr.dev and bzr-svn. The conversion started out somewhat better, but memory use exploded as soon as it finished downloading revisions. It used about 800 MiB RAM, and around 1 GiB swap space. Details are in the attached graph.

For comparison, the same conversion using git-svn took 61 minutes and 72 MiB RAM.

[Jelmer Vernooij (jelmer)]

I can reproduce this.

[Rolf Leggewie (r0lf)]

Same thing here for "bzr get svn+ssh://<email address hidden>/repo//gnucash/branches/aqbanking3". Unfortunately, I had to abort the process about 2/3 of the way when memory usage hit 2G.