Posts Tagged ‘hg’
bzr, git, and hg performance on the Linux tree
OK, so I just did a historical comparison of git and bzr performance using the Linux source tree. One of the comments I got was “what about Mercurial?” Fair enough. I’ve really never done much with Mercurial because Ubuntu primarily uses bzr and git is what most of the other people I know using a DVCS use. However, there are a lot of projects using Mercurial, Mozilla being probably the most notable one. So, here’s a comparison of bzr and hg. You may want to read my previous post for details on the steps I’m doing.
Repo Initialization:
git bzr hg
0m0.086s 0m0.334s 0m0.137s
1 : 3.88 : 1.59
Add 2.6.0 Linux tree:
git bzr hg
0m14.269s 0m4.852s 0m2.526s
5.65 : 1.92 : 1
Commit 2.6.0 Linux tree:
git bzr hg
0m10.263s 0m43.968s 0m30.890s
1 : 4.28 : 3.01
Diff after copying in 2.6.25.2 Linux tree:
git bzr hg
0m24.425s 0m51.158s 0m37.846s
1 : 2.09 : 1.55
Committing large changes:
git bzr hg
0m28.468s 1m8.627s 0m47.948s
1 : 2.41 : 1.68
Diff after no changes:
git bzr hg
0m0.343s 0m47.448s 0m1.340s
1 : 138 : 3.91
Getting repo status after no changes:
git bzr hg
0m1.230s 0m4.027s 0m1.077s
1.14 : 3.74 : 1
Committing a trivial change:
git bzr hg
0m0.397s 0m9.010s 0m1.913s
1 : 22.7 : 4.82
Repository size (just VCS control directory):
git (gc) bzr (pack) hg
92 MB 112 MB 179 MB
So, Mercurial performs quite well. It generally sits somewhere between git and bzr. Hg runs somewhere around 2.75 times slower than git in the tested operations. Bzr runs around 5 times slower with the notable exception that bzr diff when there are no changes is 138 times slower than git and 35 times slower than Hg.
