Bazaar still below the radar when evaluating VCS tools

[John Arbash Meinel]

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Paul Moore wrote:
> On 26 February 2010 17:57, Parth Malwankar <parth.malwankar at gmail.com> wrote:
>> One thing I think that has hit bzr is the "its slow" tag. While this
>> is no longer the case this tag has stayed. Unfortunately there are
>> no recent speed benchmarks available. Most are quite old. Probably
>> users of bzr who have a blog could consider posting some benchmarks.
>>
>> I see some space benchmarks at http://wiki.bazaar.canonical.com/Benchmarks
>> but there is nothing on performance. Maybe some performance benchmarks
>> can be put based on some well known medium to large size projects already
>> being handled by bzr. These need not necessarily be "bzr vs X" and could
>> be just bzr numbers. It would give people evaluating DVCSes a feel for bzr
>> performance.
> 
> The trouble is that the impression isn't based on comparisons and
> benchmarks. It's a gut feel type of thing.
> 
> Just to see, I tried my (hugely simplistic, completely unfair, ...)
> initial clone test - just create an initial branch of the Python 3k
> repository using Mercurial and Bazaar. It's intended as a view of a
> newcomer's initial impression of the 2 systems - no clever workflow
> setup, no performance tweaking, just install the tool, search the web
> for the place to get the Python source in the appropriate format, and
> go for it.
> 
>> timer & bzr branch lp:python/py3k bzr-py3k & timer
> Timer 1 on: 19:29:12
> You have not informed bzr of your Launchpad ID, and you must do this to
> write to Launchpad or access private data.  See "bzr help launchpad-login".
> Branched 40811 revision(s).
> Timer 1 off: 19:36:06  Elapsed: 0:06:54.44
> 
>> timer & hg clone http://code.python.org/hg/branches/py3k/ hg-py3k & timer
> Timer 1 on: 19:40:15
> requesting all changes
> adding changesets
> adding manifests
> adding file changes
> added 5504 changesets with 25490 changes to 4770 files
> updating to branch py3k
> 3424 files updated, 0 files merged, 0 files removed, 0 files unresolved
> Timer 1 off: 19:41:43  Elapsed: 0:01:27.32
> 
> Mercurial 1.5 minutes, Bazaar nearly 7 minutes. That's definitely
> going to give an initial impression of "Bazaar is slow". And that's
> with current versions of both so is it really "no longer the case"
> that Bazaar is slower?
> 
> I'm curious to know if there are good reasons for the difference (that
> "40811 revisions" vs "5504 changesets with 25490 changes" is
> suspicious, and I guess Launchpad may still be on an old repo format)

^- Changesets vs revisions is pretty close to the same thing. So
Mercurial has 1/8th the history that the Bazaar branch has. Why? I don't
know, but that is certainly significant.

John
=:->

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