Holy overengineering, Batman. IP addresses of all things are trivially parseable into fixed-length byte sequences. Just do that and use a search tree. Or, IDK; this is an extremely solved problem, there are probably even better solutions out there – but I promise you text regex is involved in none of the good ones.
Even for actual string matching, any decent regex engine will compile and optimise an alternation a|b|c|... better than this text wrangling will. Unless you have actual benchmarks showing this gives you an advantage with the engine you’re using, you’re just introducing complexity for no gain.
In my case, to efficiently match against a large number of IP addresses and IP address ranges:
https://codeberg.org/tslocum/sriracha/src/commit/5bf24b0daabd058c2714427da17c7ea16b7cd43a/internal/server/server.go#L447
Holy overengineering, Batman. IP addresses of all things are trivially parseable into fixed-length byte sequences. Just do that and use a search tree. Or, IDK; this is an extremely solved problem, there are probably even better solutions out there – but I promise you text regex is involved in none of the good ones.
Even for actual string matching, any decent regex engine will compile and optimise an alternation
a|b|c|...better than this text wrangling will. Unless you have actual benchmarks showing this gives you an advantage with the engine you’re using, you’re just introducing complexity for no gain.Also of note. Regexlicensing.org has issued no licences to date for use of regex in production environments
https://regexlicensing.org/license/
Not much substance to their argument, mostly just whining. Funny website, though.