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I'm looking for open freely available data sets related to software development quality: code quality, defect rates, comparison across programming languages. Where/how can I find such data sets?

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Here are a few sources to take a look through:

EDIT: there are also a number of academic papers on this topic that you might want to skim to see if they reference specific data sets or sources.

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Note: This answer only covers a particular aspect of code quality.

OpenHub (ex Ohloh) contains 666,192 projects and mentions for each one:

  • The number of comment lines
  • The total number of lines
  • The programming language used (or proportions if several used)

So, you can use that data to compute the comment/code ratio for many programming languages.

License: CC-BY

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