Number of authors
Number of authors gives an idea of the size of the active community for a report. In this case, we're measuring, for each week in the chart, the number of different identities that authored at least one commit, or that submitted issues or reviews (pull or merge requests) to any repository of the report during that week. Although this is usually a good indicator of people who are active in the project, it is important to notice that, during any given week, active developers may be busy with some other stuff, thus not appearing in this chart. Also, casual contributors (such as somebody submitting a bug report but not really engaged with the project) appear in the chart. People taking care of important tasks, such as writing documentation, may also be reflected in this chart, or not, depending on the repositories included in the report, and how the project deals with those tasks.
Read more
