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授業でプロプライエタリからオープンソースになったソースコードが “改善” された度合いの論文を紹介された気がするんだけど思い出せない
How maintainable is the Firefox codebase?
https://almossawi.com/firefox/prose/
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How maintainable is the Firefox codebase?How maintainable is the Firefox codebase?This work explores a particular facet of quality in Firefox, namely, maintainability. By appealing to the explanatory powers of five practical measures of architectural complexity, and with the aid of static analysis and network manipulation tools, we arrive at some preliminary findings. We find that 21% of files in Firefox are highly interconnected, a value that went up significantly following version 3.0. We find that making any change to a randomly selected file can, on average, directly impact 10 files and indirectly impact over 2,300 files. We see that files' internal complexity is on average going down. Their external complexity as measured by direct dependencies is also going down, whereas their external complexity as measured by propagation cost has remained steady. With respect to process, we find that the switch to the rapid release cycle from version 5.0 onwards had a positive impact on quality. Though the analysis reveals no imminently alarming red flags when it comes to maintainability, it does shine light on a number of issues that would be worth investigating.