For the algorithm, in addition to dragon book, there's a paper "Fast brief practical DFA minimization" which is paywalled but available on sci-hub. (doi:10.1016/j.ipl.2011.12.004) (edit: also available here https://www.cs.cmu.edu/~cdm/papers/Valmari12.pdf)
For the algorithm, in addition to dragon book, there's a paper "Fast brief practical DFA minimization" which is paywalled but available on sci-hub. (doi:10.1016/j.ipl.2011.12.004) (edit: also available here https://www.cs.cmu.edu/~cdm/papers/Valmari12.pdf)
A real-world example of how much difference DFA minimization makes: https://twitter.com/cfbolz/status/1461300039398088707