static void Main()
{
const int REPEATS = 50;
const int SIZE = 1000000;
List <int> list = new List <int>(SIZE);
Random rand = new Random(12345);
for (int i = 0; i < SIZE; i++)
{
list.Add(rand.Next(5000));
}
int[] arr = list.ToArray();
DynamicArray <int> darr = new DynamicArray <int>();
foreach (int v in list)
{
darr.Add(v);
}
long hits = 0;
long chk = 0;
Stopwatch watch = Stopwatch.StartNew();
for (int rpt = 0; rpt < REPEATS; rpt++)
{
int len = list.Count;
for (int i = 0; i < len; i++)
{
chk += list[i];
hits++;
}
}
watch.Stop();
Console.WriteLine("List/for : {0}ms ({1}) ", watch.ElapsedMilliseconds, chk);
chk = 0;
hits = 0;
watch = Stopwatch.StartNew();
for (int rpt = 0; rpt < REPEATS; rpt++)
{
for (int i = 0; i < arr.Length; i++)
{
chk += arr[i];
hits++;
}
}
watch.Stop();
Console.WriteLine("Array/for : {0}ms ({1})", watch.ElapsedMilliseconds, chk);
chk = 0;
hits = 0;
watch = Stopwatch.StartNew();
int[] arr2 = darr.Compact();
for (int rpt = 0; rpt < REPEATS; rpt++)
{
for (int i = 0; i < arr2.Length; i++)
{
chk += arr2[i];
hits++;
}
}
watch.Stop();
Console.WriteLine("DArray/for : {0}ms ({1})", watch.ElapsedMilliseconds, chk);
Console.WriteLine();
chk = 0;
watch = Stopwatch.StartNew();
for (int rpt = 0; rpt < REPEATS; rpt++)
{
foreach (int i in list)
{
chk += i;
}
}
watch.Stop();
Console.WriteLine("List/foreach : {0}ms ({1})", watch.ElapsedMilliseconds, chk);
chk = 0;
watch = Stopwatch.StartNew();
for (int rpt = 0; rpt < REPEATS; rpt++)
{
foreach (int i in arr)
{
chk += i;
}
}
watch.Stop();
Console.WriteLine("Array/foreach : {0}ms ({1})", watch.ElapsedMilliseconds, chk);
chk = 0;
watch = Stopwatch.StartNew();
int[] c = darr.Compact();
for (int rpt = 0; rpt < REPEATS; rpt++)
{
foreach (int i in c)
{
chk += i;
}
}
watch.Stop();
Console.WriteLine("DArray/foreach: {0}ms ({1})", watch.ElapsedMilliseconds, chk);
Console.WriteLine();
Console.WriteLine("Total number of hits: {0:N0}", hits);
Console.ReadKey();
}