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  1. #include <iostream>
  2. #include <ctime>
  3. #include <set>
  4. #include <tr1/unordered_set>
  5. #include <cstdlib>
  6.  
  7. int main()
  8. {
  9.         std::set<int> a;
  10.         std::tr1::unordered_set<int> b;
  11.         clock_t c0 = clock();
  12.         for (int i = 0; i < 20000000; i++)
  13.                 a.insert(rand() % 20);
  14.         clock_t c1 = clock();
  15.         for (int i = 0; i < 20000000; i++)
  16.                 b.insert(rand() % 20);
  17.         clock_t c2 = clock();
  18.         std::cout << "a/b = "
  19.                           << static_cast<double>(c1 - c0) / CLOCKS_PER_SEC
  20.                           << "/"
  21.                           << static_cast<double>(c2 - c1) / CLOCKS_PER_SEC
  22.                           << std::endl;
  23.         return 0;
  24. }
Success #stdin #stdout 2.01s 2860KB
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stdin
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Standard input is empty
stdout
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a/b = 1.21/0.79
https://ideone.com/YupK4
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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