Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2018. The current version is 1.90.0.
Constructor.
io_context(
int concurrency_hint);
Construct with a hint about the required level of concurrency.
A suggestion to the implementation on how many threads it should allow to run simultaneously.