The talk aims to provide quantitative data from 16 years of development to convince management of the benefits of code reviews.
An overview of the Teamscale product, its 1.5 million line codebase, and the team's development velocity provides context for the data analysis.
The team uses a feature branch workflow with asynchronous reviews in GitLab, where the reviewer has the final authority to merge.
The analysis frames the "worth" of code reviews by comparing their value (code improvement, knowledge sharing) against their cost (developer time).
An analysis of time logged on tickets reveals the distribution of time spent in the "in review" and "in rework" phases.
An example ticket shows how scope creep and implementing new requirements during the review cycle can significantly inflate review time data.
Data shows reviews add 33% to development time while providing an average of 1.6 bug fixes and 5 maintainability improvements per ticket.
Weighing the 33% additional time cost against the benefits of bug fixes, maintainability improvements, and knowledge sharing confirms their value.
28:09Jan Oberhauser, Mirko Novakovic, Alex Laubscher & Keno Dreßel
26:35Yishai Beeri
26:46Gerrit Stapper
24:19Johannes Haux
26:38Andrew Boyagi
43:00Luka Kladaric
17:56Stefan Stelzer & Volker Zöpfel
30:40Olivier Gaudin
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