For my research work I have been developing a small C++ library aimed at facilitating the communication between C++ computational codes and Octave/Matlab (when the latter is used for post-processing purposes).
I would like release such a library under GPL on some free hosting site such as Sourceforge or Github.
Honestly, though, I'm lacking in experience to choose which site better suits a (small) library as mine.
On one hand, github looks to me more immediate, on the other hand, Sourceforge is a reference site for scientific codes, many of them are hosted there.
EDIT: I enlarge my question.
The library I am talking about is a small project ($\approx 15K$ CL, currently in a private repo on bitbucket), almost personal, which followed 2 years of boring technical requests by my supervisors and 6 months of code design (mostly by trial and error).
After some inquires I noticed that sourceforge has a nice mechanism allowing one to make statistics about visits of the project page and downloads, thus people (users) just downloading the lib to use it (if ever any) can be somehow counted.
Github, on the other hand, looks way easier from the point of view of developers (here I mean someone that is interested also in analyzing,extending,forking the code).