A few months ago I optimized the parsing of a file and did some micro benchmarks. I observed a similar speed-up compared to stoi and atoi (didn't bother to look

A few months ago I optimized the parsing of a file and did some micro benchmarks. I observed a similar speed-up compared to stoi and atoi (didn't bother to look at stringstream). Others already commented, that it's probably due to not supporting locales.