模块会成为C ++ 20的一部分吗？ 它会减少库的编译时间吗？

Question

Hi I am full time c++ programmer with 2.5 years experience. I felt good about new C++14 features. I use them everyday. However every time I compile my code it takes lot of time some time even more than 15 min. I went through the guidelines on how to reduce compile time using Forward References, Pre-compiled headers etc.. However it still take long time to compile even for small c++ projects which I like to try some logic/new feature or a library. I read little about modules which didn't make it to C++17. I am just curious to know will it be part of C++20 ? Will it reduce compilation time ?If so by how much factor ?

Answer 1

From the second edition of "A Tour of C++":

The language feature, called modules is not yet ISO C++, but it is an ISO Technical Specification [ModulesTS]. Implementations are in use, so I risk recommending it here even though details are likely to change and it may be years before everybody can use it in production code. -- Bjarne Stroustrup, A Tour of C++, June 2018 .

And while factors will vary, Dr. Stroustrup notes:

The effects on maintainability and compile-time performance can be spectacular.