Evaluating coroutine performance on Visual C++

coroutine_test.cpp

#include <cstdio>
#include <random>
#include <experimental/generator>

auto random()
{
  std::mt19937 r;
  for (;;)
    co_yield r();
}

int main()
{
  for (auto r : random())
    std::printf("%d\n", r);
}