The following code example is taken from the book
C++ Move Semantics - The Complete Guide
by Nicolai M. Josuttis,
Leanpub, 2020
The code is licensed under a
Creative Commons Attribution 4.0 International License.
// raw code
#include <chrono>
// measure num initializations of whatever is currently defined as Person:
std::chrono::nanoseconds measure(int num)
{
std::chrono::nanoseconds totalDur{0};
for (int i = 0; i < num; ++i) {
std::string fname = "a firstname a bit too long for SSO";
std::string lname = "a lastname a bit too long for SSO";
// measure how long it takes to create 3 Persons in different ways:
auto t0 = std::chrono::steady_clock::now();
Person p1{"a firstname too long for SSO", "a lastname too long for SSO"};
Person p2{fname, lname};
Person p3{std::move(fname), std::move(lname)};
auto t1 = std::chrono::steady_clock::now();
totalDur += t1 - t0;
}
return totalDur;
}