A faster C++ routine to convert 64 bit integers to ASCII form or std::string.
Just include the source file fast_int_to_string.hpp
into the translation unit.
In big data processing (e.g. columnar storage engines) even 10% improvement due to algorithmic/macro optimization results in cumulative effect (assuming other parts of the code is competitive enough). In my testing the conversion routine is 30-90% faster than standard counterparts.
Added few unit and performance tests.
Please report.