Typically if I’m reading text from a file that I want to parse, say a .csv file I’ve used a combination of an ifstream , std::getline and then a std::stringstream to parse the line into words or entries. Inspired by a suggestion in the c++ help discord I tried using std::string functions like std::string::find and substr instead and surprisingly it turned out to be much faster
code and benchmark here
https://quick-bench.com/q/W_8UPCi7BG7isXYsVZAgTSIlCDo