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  1. using System;
  2. using System.Diagnostics;
  3.  
  4. class Program {
  5.   //const int dimsize = 10000;
  6.   const int dimsize = 100;
  7.   Random rnd = new Random();
  8.   void Jag() {
  9.     var sw = Stopwatch.StartNew();
  10.     int [][] dm = new int[dimsize][];
  11.     for (int i=0; i<dimsize; i++) dm[i] = new int[dimsize];
  12.     for (int i=0; i<dimsize; i++) {
  13.       for (int j=0; j<dimsize; j++) dm[i][j] = rnd.Next();
  14.     }
  15.     for (int j=0; j<dimsize; j++) {
  16.       for (int i=0; i<dimsize; i++) dm[i][j] += rnd.Next();
  17.     }
  18.     int sum = 0;
  19.     for (int i=0; i<dimsize; i++) {
  20.       for (int j=0; j<dimsize; j++) sum += dm[i][j];
  21.     }
  22.     sw.Stop();
  23.     Console.WriteLine("jagged : {0} : {1}", sw.Elapsed, sum);
  24.   }
  25.   void Squ() {
  26.     var sw = Stopwatch.StartNew();
  27.     var dm = new int[dimsize, dimsize];
  28.     for (int i=0; i<dimsize; i++) {
  29.       for (int j=0; j<dimsize; j++) dm[i,j] = rnd.Next();
  30.     }
  31.     for (int j=0; j<dimsize; j++) {
  32.       for (int i=0; i<dimsize; i++) dm[i,j] += rnd.Next();
  33.     }
  34.     int sum = 0;
  35.     for (int i=0; i<dimsize; i++) {
  36.       for (int j=0; j<dimsize; j++) sum += dm[i, j];
  37.     }
  38.     sw.Stop();
  39.     Console.WriteLine("square : {0} : {1}", sw.Elapsed, sum);
  40.   }
  41.   static void Main() {
  42.     var p = new Program();
  43.     p.Jag();
  44.     p.Squ();
  45.     p.Jag();
  46.     p.Squ();
  47.   }
  48. }
  49.  
Success #stdin #stdout 0.04s 34096KB
comments (?)
stdin 
Standard input is empty
stdout 
jagged : 00:00:00.0015175 : -586934788
square : 00:00:00.0008705 : 1649596065
jagged : 00:00:00.0008906 : 816731248
square : 00:00:00.0007834 : -1712916278
https://ideone.com/VewfYv
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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