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  1. #include <iostream>
  2. #include <vector>
  3. #include <list>
  4. #include <ctime>
  5.  
  6. using namespace std;
  7.  
  8. int testVector(int count) {
  9.   vector<int> v;
  10.   for (int i=0; i<count; i++) v.push_back(count-i);
  11.   return v.size();
  12. }
  13.  
  14. int testVector2(int count) {
  15.   vector<int> v;
  16.   for (int i=0; i<count; i++) v.insert(v.begin(), 1, i);
  17.   return v.size();
  18. }
  19.  
  20. int testList(int count) {
  21.   list<int> v;
  22.   for (int i=0; i<count; i++) v.push_back(count-i);
  23.   return v.size();
  24. }
  25.  
  26. int testList2(int count) {
  27.   list<int> v;
  28.   for (int i=0; i<count; i++) v.push_front(count-i);
  29.   return v.size();
  30. }
  31.  
  32. int main() {
  33.   const int loopcnt = 1000000;
  34.   const int loopcnt2 = 100000;
  35.   clock_t sw;
  36.   sw = clock();
  37.   int c = testVector(loopcnt);
  38.   sw = clock() - sw;
  39.   cout << "vector back : " << c << " : " << sw / (double) CLOCKS_PER_SEC << endl;
  40.   sw = clock();
  41.   c = testVector2(loopcnt2);
  42.   sw = clock() - sw;
  43.   cout << "vector front : " << c << " : " << sw / (double) CLOCKS_PER_SEC << endl;
  44.   sw = clock();
  45.   c = testList(loopcnt);
  46.   sw = clock() - sw;
  47.   cout << "list back : " << c << " : " << sw / (double) CLOCKS_PER_SEC << endl;
  48.   sw = clock();
  49.   c = testList2(loopcnt);
  50.   sw = clock() - sw;
  51.   cout << "list front : " << c << " : " << sw / (double) CLOCKS_PER_SEC << endl;
  52.   return 0;
  53. }
  54.  
Success #stdin #stdout 3.92s 19008KB
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stdin
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Standard input is empty
stdout
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vector back : 1000000 : 0
vector front : 100000 : 3.69
list back : 1000000 : 0.13
list front : 1000000 : 0.08
https://ideone.com/NynvMY
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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