[speed test] Set&Get values (unordered_map vs char)

#include <iostream>
#include <unordered_map>
#include <string>
#include <cstring>
#include <ctime>
#include <iostream>

#include <chrono>
long long timestamp()
{
    return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
}

char text_c[10000][128];
typedef std::unordered_map<int, std::string> text_u;

int main() {
    std::cout << "Inicio" << std::endl;
    text_u Text_u;
    int timea = timestamp();
    for(int x=0; x!=10000; x++) {
        strcpy(text_c[x],"Era uma vez...");
    }
    std::cout << "tempo " << timestamp()-timea << std::endl;

    int timeb = timestamp();
    for(int x=0; x!=10000; x++) {
        Text_u.insert(text_u::value_type(x,"Era uma vez..."));
    }
    std::cout << "tempo " << timestamp()-timeb << std::endl;

    char texto[128];
    int time1 = timestamp();
    for(int x=0; x!=10000; x++) {
        strcpy(texto,text_c[x]);
    }
    std::cout << "tempo " << timestamp()-time1 << std::endl;

    int time2 = timestamp();
    for(int x=0; x!=10000; x++) {
        text_u::iterator j = Text_u.find(x);
        strcpy(texto,(j->second).c_str());
    }
    std::cout << "tempo " << timestamp()-time2 << std::endl;


    return 1;
}