In this web content, the author delves into the process of converting a string to an integer using different techniques. They start by discussing how to convert a string to an integer in C++ and the potential errors that may occur during the conversion process. The author then introduces AVX-512, a new instruction set available in recent Intel processors, which allows for faster data processing by selecting a specific range of data. They provide code examples utilizing AVX-512 intrinsic to compute the span of bytes and perform various operations on the string data. The author compares the performance of AVX-512 to the standard approach and highlights the significant speed improvement. However, they note that the comparison may not be entirely fair due to assumptions made in the AVX-512 function. Finally, the author acknowledges the influence of John Keiser and discusses changes made to their code.
https://lemire.me/blog/2023/09/22/parsing-integers-quickly-with-avx-512/