Test

Some folks in #mercurial @ freenode.net just repeated the tests, so we have now a bit more stable data.

The evaluation shows the following:

1. Initial clone: hg is about 4.4 times faster (about 2 min vs. 6 to 15 min)
2. Repository sizes: the hg repo is about 1.92 smaller (~113M vs. 215M)
3. Time for a full log: hg is about 2.36 times faster (~21s vs. ~50s)
4. Time for annotating Misc/NEWS: hg is 1.5 times slower than bzr.
   Without the result from bzr-1.6.1 it is 2.6 times slower (~43s vs 17s).
5. Integrity checking: hg is by several orders of magnitude faster than bzr which just took too long - everyone stopped it after varying time (30s to 17 min), because the output spoke of hours remaining, one had an integrity error. hg needed about 1 min.
6. Local clone: hg is 11 times faster (39s vs. 7.14 min).
   Without the 1m15 result from the high disk load host it is 16 times faster (26s).
7. Local clone with hot filesystem: hg is 14.9 times faster (26s vs. 6.5 min).
8. Hot copy of just .bzr / .hg: The speeds are about equal, so the difference doesn't come from raw filesystem speed (2s).
9. Additional Bazaar tests to check shared repository cloning performance (you only get this when you use a shared repository and only clone that shared repository): With shared repository and hardlinks bzr only needs about 5 seconds for cloning.

I repeatet my test with the provided Python 2.x repos from the DVCS PEP for Python to check the performance of Bazaar and Mercurial.

All these tests are done only once with some mostly constant load, so they don't qualify as scientific tests, but they give a good impression of the differences between Bazaar (bzr) and Mercurial (hg).

Versions:
- Bazaar 1.10
- Mercurial 1.1

This comparision should be fair since Bazaar 1.10 is more recent, but Mercurial 1.1 is a major release.

I just did a test with the provided Python 2.x repos from the DVCS PEP for Python to check the performance of Bazaar and Mercurial.

(this is a slightly changed version of a mail posted to the mercurial list: http://selenic.com/pipermail/mercurial/2008-November/022199.html )

All these tests are done only once with some mostly constant load, so they don't qualitfy as scientific tests, but they give a good impressing of the differences between Bazaar (bzr) and Mercurial (hg).

Versions:
- Bazaar 1.5
- Mercurial 1.0.2

These are the ones which are marked as stable in my Gentoo tree (amd64).

Ich habe getestet, ob es einen Geschwindigkeitsunterschied zwischen zwei Arten des for loops über eine Liste von tuples gibt:

liste_von_tuples = [(1, 2), (3, 4), (5, 6)]

Es gibt 100.000 tuple, und jeder tuple enthält 2 Zufallszahlen.

Art 1:

for i in liste_von_tuples: 
   res.append(i[1])

Art 2:

for i, j in liste_von_tuples: 
   res.append(j)

Ich habe ein paar kleine "Tests" zu Gnutella gemacht.

"Test" ist in Anführungszeichen, weil diese Tests nur Stichproben sind und daher keine Statistisch signifikante Aussage haben.

Aber ich dachte, sie könnten trotzdem interessant sein.

Geschwindigkeit der Suchen

Mit Einschränkung: Es werden nur Dateien über 20MiB angezeigt.

Relativ wenig verbreitete Dateien

Suche nach "anime":
4s, bis die ersten Ergebnisse kommen, 6s bis eine recht große Menge da ist. Nach etwa 30s fließen nur noch wenige neue Ergebnisse rein.