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#include <iostream>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#include <chrono>
template<typename T>
void test (std::string_view name, T const& s, int count)
{
std::cout << "[" << name << "]:\n";
std::vector<T> result;
namespace cho = std::chrono;
auto start = cho::system_clock::now();
for (auto i=0; i<count; i++)
{
auto s1 = s.substr(10);
auto s2 = s.substr(5, 3);
auto s3 = s.substr(s.size() - 3, 50);
result.push_back(std::move(s1));
result.push_back(std::move(s2));
result.push_back(std::move(s3));
}
auto ms = cho::duration_cast<cho::milliseconds>(cho::system_clock::now() - start);
std::cout << result[0] << ","
<< result[count / 3] << ","
<< result[count / 2] << ","
<< result[count * 2 / 3] << ","
<< result[count / 2] << ","
<< result[count] << ","
<< result[count * 2] << ","
<< result[count * 3 - 1] << "\n";
std::cout << ms.count() << std::endl;
}
int main()
{
int const count = 10'000'000;
std::string data = "0123456789abcdefghij";
{
test("string_data", data, count);
}
{
test("string_view", std::string_view{data}, count);
}
return 0;
}
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