If you enjoy the article, the author has published a book explaining Git internals: Building Git. As a programmer, you use version control systems like Git, spending time looking at diffs. Diffs allow you to check uncommitted work, compare branches, and more. They’re read by people but also used by version control systems for automation. Emailing a diff allows others to merge it. The default diff algorithm used by Git, developed by Eugene W. Myers, is explained here. Myers’ algorithm finds the shortest edit script from one string to another, prioritizing deletions over insertions. It’s fast and produces high-quality diffs most of the time.
https://blog.jcoglan.com/2017/02/12/the-myers-diff-algorithm-part-1/