What happens in my code reviews? An investigation on automatically classifying review changes

Abstract

Code reviewing is a widespread practice used by software engineers to maintain high code quality. To date, the knowledge on the effect of code review on source code is still limited. Some studies have addressed this problem by classifying the types of changes that take place during the review process (a.k.a. review changes), as this strategy can, for example, pinpoint the immediate effect of reviews on code. Nevertheless, this classification (1) is not scalable, as it was conducted manually, and (2) was not assessed in terms of how meaningful the provided information is for practitioners. This paper aims at addressing these limitations: First, we investigate to what extent a machine learning-based technique can automatically classify review changes. Then, we evaluate the relevance of information on review change types and its potential usefulness, by conducting (1) semi-structured interviews with 12 developers and (2) a qualitative study with 17 developers, who are asked to assess reports on the review changes of their project. Key results of the study show that not only it is possible to automatically classify code review changes, but this information is also perceived by practitioners as valuable to improve the code review process. Data and materials: 10.5281/zenodo.5592254

How social interactions can affect Modern Code Review

“…Many studies successfully used interviews to investigate various aspects of the software development process, and the code review in particular (Bird and Bacchelli, 2013;Rigby and Bird, 2013;Kononenko et al, 2016;Bosu et al, 2017;Sadowski et al, 2018;Fregnan et al, 2022). Thus, we also relied on this method to collect data on the attitudes of professional developers toward MCR process and the human factors affecting it.…”