Arfon Smith has created some interesting graphs that visualize the collaborative nature of a few open source projects on GitHub using pull request data.
Since the last step in the life cycle of a GitHub pull request is hopefully hitting the merge button, it’s easy to think of them just as a way of submitting code to a project. Pull requests are so much more than that though. Pull requests are discussion + code. That discussion often prompts changes to the code and more commits to the branch behind the PR.
Using pull request data from Octokit.rb, Arfon visualizes how often pull requests are truly collaborative — when commits are added to the PR after it was opened.
Fraction of pull requests to Octokit.rb that are collaborative over time (grouped by month). The size of the dot is proportional to the number of pull requests in that time period.
While GitHub’s own project graphs visualize commits over time, Arfon’s merge fraction shows how often pull requests land in a project:
Fraction of pull requests merged over time (grouped by month). The size of the dot is proportional to the number of pull requests in that time period (mouseover to see the count).