looking for "market share" analysis of SCMs.

Hi,

I'm looking for a survey that analyses the market share of the major SCMs (including git of course). If someone knows about something like that, can you please point me to it? (optimally, such a survey will take into account how large the projects are)

Thank you, Ittay

Am Dienstag 20 Mai 2008 10:57:38 schrieb Ittay Dror:

http://wiki.debian.org/Statistics http://upsilon.cc/~zack/stuff/vcs-usage/

Ittay Dror wrote (2008-05-20 11:57 +0300):

Some kind of "market share analysis" is Debian popularity contest which gathers automatically information about what packages are installed on people's Debian systems. Perhaps you can get some useful information from it. I constructed a link which compares the number-of-installs of some major SCM/VCS systems:

http://people.debian.org/~igloo/popcon-graphs/index.php?packages=darcs%2Cgit-core%2Cmercurial%2Cbzr%2Csubversion%2C+cvs&show_installed=on&want_legend=on&want_ticks=on&from_date=2003-10-01&to_date=&hlght_date=&date_fmt=%25Y-%25m&beenhere=1

On Tue, May 20, 2008 at 11:32 AM, Teemu Likonen <tlikonen@iki.fi> wrote:

A more interesting one I think is http://tinyurl.com/3lf4mn as it shows the history better, that is, it better shows CVS and SVN decreasing in popularity (it also shows the point where SVN became more popular than CVS). From this graph you can also see that git is on it's way to become more popular than CVS!

http://tinyurl.com/3lf4mn

On Tue, 20 May 2008, Sverre Rabbelier wrote:

Doing it as a percentage is kind of odd; it demonstrates that using version control is decreasing in popularity as more and more people who don't use version control submit votes. All of the version control systems show an upward trend in number of users, but most of them are not growing as much as the market is shrinking. Unfortunately, there doesn't seem to be a way to get the people who use each of them as a percentage of people who use any of them, which is what you want for "market share".

	-Daniel
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On Wed, May 21, 2008 at 12:07 AM, Daniel Barkalow <barkalow@iabervon.org> wrote:

Ah, you are right, I didn't analyse the graph enough, I thought percent would show what you described above, obviously it doesn't though as the values don't add up to 100%. Even so, I think this is a better graph: http://tinyurl.com/4hu2cn Since it shows users that regularly use the package, instead of user that have it installed. Considering that these days distro's have a lot of stuff pre-installed if you go with the "coders packages" the usage votes give a better picture than looking at who has it installed (which includes people that don't use the package at all). That graph shows that in the end of 2006 SVN became more popular than CVS, whereas the one from Teemu (http://tinyurl.com/4vpqzg) does not show that, probalby because a lot of people have it installed, but don't use it. It would be interesting if we could link the grow spurts from http://tinyurl.com/4hu2cn to programming-related events, something that might have caused people to suddenly use a VCS a lot more (for example the one in CVS's line from 05-2007 till 07-2007).

On Wed, 21 May 2008, Sverre Rabbelier wrote:

Yeah, that's the one I thought was informative.

Yeah, also a lot of people have CVS installed from when they used it, but they not use something different, but haven't built new computers without it.

I think that around 05-2007, a lot more people started voting, largely non-coders, but also coders. In the percentage, there's a sharp drop where that sharp rise is.

	-Daniel
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On Wed, 21 May 2008, Sverre Rabbelier wrote:

Woo-woo!

Add RCS to the list (because real mean use the real thing(tm)), and see how git passed RCS late last year.

		Linus

On Wed, May 21, 2008 at 4:06 PM, Linus Torvalds <torvalds@linux-foundation.org> wrote:

Heh. And trim it to start on 2005-7-12 - the date of the first debian package for it. Makes the graph more interesting.

Do I confess I added tla to the list too? Some things in my past I rather not talk about...

cheers,

m

On Wed, May 21, 2008 at 6:26 AM, Martin Langhoff <martin.langhoff@gmail.com> wrote:

Trimming it does make the graph a lot nicer although doing prevents you from comparing the grow curves (of CVS and SVN with those of git). http://tinyurl.com/6hj5ds

I'm afraid 'tla' is too insignificant to be of interest :P, it's steady at, say, 100 users.

On Wed, May 21, 2008 at 4:44 PM, Sverre Rabbelier <alturin@gmail.com> wrote:

Actually, if we define the "market" to be DSCM, and the timeframe to be existence of the git-core package, this graph of installs is quite useful: http://tinyurl.com/4uemg2

Maybe git-archimport has made a dent? ;-) http://tinyurl.com/5okewp

cheers,

m

On Wed, May 21, 2008 at 7:10 AM, Martin Langhoff <martin.langhoff@gmail.com> wrote:

Hehe, that feels a bit like manually favoring the odds in our benefit, but it's fun to see how git is the most popular DSCM since 2007 ;).

It would seem the contrary is true, the usage of tla was steadily declining, but since git-arch it has been picking up! (Well, that is what one could naively deduct from this graph, there's probably another explanation :P).

onsdagen den 21 maj 2008 07.21.50 skrev Sverre Rabbelier:

Diff+tar+patch should be counted too. http://tinyurl.com/3frawy Seems far more popilar than anything else added together, including cvs and other subversive systems.

-- robin

On Wed, 21 May 2008, Robin Rosenberg wrote:

I think tar and diff are necessary to install git-core or any other .deb, so it's unsurprising that they've got a 100% market share by that metric. Until Debian switches to a git-based package format, git's not going to catch up to those...

On the other hand, the "vote" value for patch is a reasonable metric, and it's been steadily close to but above the version control systems.

	-Daniel
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Daniel Barkalow wrote (2008-05-21 16:07 -0400):

Yes, tar and diff are in every Debian system and can't be casually removed:

  $ aptitude remove tar
  [...]

  WARNING: Performing this action will probably cause your system to break!
           Do NOT continue unless you know EXACTLY what you are doing!
  To continue, type the phrase "I am aware that this is a very bad idea":

And more popularity contests around Debian

The overall thread should appear in the archive around here - (not there yet at time of writing): http://lists.debian.org/debian-devel/2008/05/threads.html#00583

This graph is of VCS usage by package maintainers to keep track of the local patches applied on top of upstream. It sure makes git look good: http://upsilon.cc/~zack/stuff/vcs-usage/

cheers,

m

On Wed, May 21, 2008 at 6:06 AM, Linus Torvalds <torvalds@linux-foundation.org> wrote:

I have to admit I never heard of RCS before you mentioned it, but sure is nice to know we passed them! :D This graph shows only git, subversion, cvs, and rcs, since the other ones don't really have any market share and just clutter the bottom of the graph.

http://tinyurl.com/6hj5ds

It looks like a steady growth but I'm not sure we'll pass CVS before the "end of the world" in 2012. (Just picked the "end of the world" in 2012 as a random reference point since it's relatively close to now and most people have heard of that theory.)

Linus Torvalds:

I have been using RCS for local version control (like in my /etc directory), when I did not want to involve a CVS server. I find that Git does that job much better, so I am switching to Git there as well. Very nice :-)

The graphs are all missing "cvsnt", which does replace the cvs package if installed. But even if added, cvs is still losing market share.

Ittay Dror <ittayd@tikalk.com> writes:

It's not exactly "market share", and answers are obviously severly biased, but you can take a look at answers and _comments_ to question "10. What other SCMs did/do you use?" in Git User's Survey 2007: http://git.or.cz/gitwiki/GitSurvey2007#head-4ed59e7615e2dc4f4baa8fa0beccde52c93789f8 (comments mention Ohloh stacks and Debian popularity contents, popcon).

You can also read the following articles on Elijahs' blog:
  http://blogs.gnome.org/newren/2007/11/17/adoption-of-various-vcses/
  http://blogs.gnome.org/newren/2008/03/01/happenings-in-the-vcs-world/

HTH