private static void CompareLinearAndBinarySearch()
{
for (int arraySize = 1; arraySize < 25; arraySize++)
{
Console.WriteLine("CompareLinearAndBinarySearch. ArraySize: {0}", arraySize);
Console.WriteLine("*******************************************************************");
int[] keys = new int[arraySize];
for (int i = 0; i < arraySize; i++)
{
keys[i] = i + 1;
}
Stopwatch sw = Stopwatch.StartNew();
long k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundLinear(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundLinear: {1} ms", k, sw.ElapsedMilliseconds);
sw.Restart();
k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundLinear4(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundLinear4: {1} ms", k, sw.ElapsedMilliseconds);
sw.Restart();
k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundLinear8(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundLinear8: {1} ms", k, sw.ElapsedMilliseconds);
sw.Restart();
k = 0;
for (int i = 0; i < 1000000; i++)
{
k += SearchHelpers.UpperBoundBinary(keys, arraySize, arraySize);
}
sw.Stop();
Console.WriteLine("K: {0}. UpperBoundBinary: {1} ms", k, sw.ElapsedMilliseconds);
Console.WriteLine("*******************************************************************\r\n");
}
}
public void UpperBoundBinary_Random()
{
for (int i = 1; i < 1000; i++)
{
var keys = GetSortedRandomKeys(i);
for (int k = 0; k < keys.Length; k++)
{
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k]), SearchHelpers.UpperBoundBinary(keys, keys.Length, keys[k]));
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k] + 1), SearchHelpers.UpperBoundBinary(keys, keys.Length, keys[k] + 1));
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k] - 1), SearchHelpers.UpperBoundBinary(keys, keys.Length, keys[k] - 1));
}
}
}
public void UpperBoundBinary_Seq()
{
for (int i = 1; i < 1000; i++)
{
var keys = GenerateKeys(i);
for (int k = 0; k < keys.Length; k++)
{
Assert.AreEqual(SearchHelpers.UpperBoundLinear(keys, keys.Length, keys[k]), SearchHelpers.UpperBoundBinary(keys, keys.Length, keys[k]));
}
}
}
