// Count occurrences of byte values in a file
static void Main(string[] args)
{
if (args.Length == 0)
{
Console.WriteLine("Need a file name!");
return;
}
var fileName = args [0];
var funcs = new Dictionary <string, Func <ByteTable> > {
{ "Stream", () => CountFromStream(fileName) }, // Process one byte at a time
{ "Memory", () => CountFromMemory(fileName) }, // Read all in memory and then process
{ "Chunks", () => CountFromChunks(fileName) }, // Read and process one chunk (1MiB) at a time
{ "Parallel", () => CountFromChunksParallel(fileName) }, // Read and process chunks (1MiB) in parallel (PLINQ)
{ "PC", () => CountProducerConsumer(fileName) }, // Producer (read from disk) and 1 Consumer (count bytes)
{ "P2C", () => CountProducerNConsumers(fileName, 2) }, // ... 2 Consumers
{ "P3C", () => CountProducerNConsumers(fileName, 3) }, // ... 3 Consumers
{ "P8C", () => CountProducerNConsumers(fileName, 8) }, // ... 8 Consumers
{ "P16C", () => CountProducerNConsumers(fileName, 16) } // ... 16 Consumers
};
ByteTable baseline = null;
foreach (var tuple in funcs)
{
var name = tuple.Key;
var func = tuple.Value;
Console.Write("{0}...", name);
var watch = new Stopwatch();
watch.Start();
var result = func();
Console.Write("\tTime: {0}ms", watch.ElapsedMilliseconds);
if (baseline == null)
{
baseline = result;
Console.WriteLine("\t[Baseline]");
}
else
{
bool ok = baseline.Equals(result);
Console.WriteLine("\t[{0}]", ok ? "OK" : "Failed");
}
}
}
