Intel® Numeric String Conversion Library (libistrconv) is a new component introduced in Intel® C++ compiler version 14.0 Update 1. This library provides a collection of routines for converting between ASCII strings of decimal numbers and C numeric data types. These routines provide similar functionality as the GLIBC functions strtol, strtoll, strtof, strtod, and snprintf, but are highly optimized for performance. See the attached PDF file for an "Introduction to the Intel® Numeric String Conversion Library".
For more complete information about compiler optimizations, see our Optimization Notice.