What are the new parallel algorithms introduced in C++17?

What are the new parallel algorithms introduced in C++17?

C++17 introduced several parallel algorithms in the Standard Template Library (STL), such as std::for_each, std::sort, and std::transform. These algorithms can be executed in parallel to improve performance.

How do I use std::for_each in parallel?

You can use std::for_each with the execution policy std::execution::par to run it in parallel. For example: std::for_each(std::execution::par, begin, end, func);.

What are execution policies?

Execution policies define how algorithms execute. In C++17, you have std::execution::seq for sequential execution, std::execution::par for parallel execution, and std::execution::par_unseq for parallel and vectorized execution.

Can I use these algorithms with custom data types?

Yes, you can use parallel algorithms with custom data types as long as you provide the necessary operations (like operator< for sorting) for those types.