On 01/21/2016 05:10 PM, Marcin Borkowski wrote: > > On 2016-01-21, at 10:39, Alexis wrote: > >> More generally, i highly recommend Jeffrey Friedl's book >> "Mastering Regular Expressions". It's not Emacs-specific, but it >> provides in-depth explanations of why certain regexen are time- >> and/or space-hungry. > > Also, this: https://swtch.com/~rsc/regexp/regexp1.html . (Btw, the author > criticizes Friedl very strongly at the end; I am not sure whether this > is deserved. Still, a very good read it is.) Indeed, a great read!