Figure 5

Comparing academic and non-academic Penumbra repositories to GitHub. Fifteen percent of Penumbra hosts are “academic” under our definition, representing 37% of all Penumbra repositories. We find that academic repositories are maintained for about as long as non-academic Penumbra repositories, so academic development practices do not drive the divergence from GitHub development patterns that we observe. Academic repositories have fewer editors per file than non-academic Penumbra repositories, however, more closely matching development practices seen on GitHub. This refutes the hypothesis that the Penumbra differs widely from GitHub primarily due to academic influence