Print Email Facebook Twitter Exploring Characteristics of Code Churn Title Exploring Characteristics of Code Churn Author Kraaijeveld, J.M. Contributor Zaidman, A.E. (mentor) Bouwers, E. (mentor) Visser, J. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Software Technology Programme Computer Science Date 2013-09-18 Abstract Software is a centerpiece in today’s society. Because of that, much effort is spent measuring various aspects of software. This is done using software metrics. Code churn is one of these metrics. Code churn is a metric measuring change volume between two versions of a system, defined as sum of added, modified and deleted lines. We use code churn to gain more insight into the evolution of software systems. With that in mind, we describe four experiments that we conducted on open source as well as proprietary systems. First, we show how code churn can be calculated on different time intervals and the effect this can have on studies. This can differ up to 20% between commit-based and week-based intervals. Secondly, we use code churn and related metrics to automatically determine what the primary focus of a development team was during a period of time. We show how we built such a classifier with a precision of 74%. Thirdly, we attempted to find generalizable patterns in the code churn progression of systems. We did not find such patterns, and we think this is inherent to software evolution. Finally we study the effect of change volume on the surroundings and user base of a system. We show there is a correlation between change volume and the amount of activity on issue trackers and Q&A websites. Subject code churnsoftware evolutionsoftware metricsclassification To reference this document use: http://resolver.tudelft.nl/uuid:91601ffa-d704-45ab-a528-a3b83224fed7 Part of collection Student theses Document type master thesis Rights (c) 2013 Kraaijeveld, J.M. Files PDF jkraaijeveld_thesis.pdf 315.13 KB Close viewer /islandora/object/uuid:91601ffa-d704-45ab-a528-a3b83224fed7/datastream/OBJ/view