static async Task MemoryMappedDecode()
{
const string path = "t8.shakespeare.txt";
Console.WriteLine();
var fi = new FileInfo(path);
if (!fi.Exists)
{
Console.WriteLine($"Input file not found: {path}");
return;
}
const int REPEAT = 10;
var enc = Encoding.ASCII;
Console.WriteLine($"Reading: {fi.Name}, {fi.Length} bytes, encoding: {enc.EncodingName}");
Console.WriteLine();
Console.WriteLine("Using PipeTextReader/MemoryMappedPipeReader (no buffer)");
for (int i = 0; i < REPEAT; i++)
{
var mmap = MemoryMappedPipeReader.Create(path);
using (mmap as IDisposable)
using (var reader = PipeTextReader.Create(mmap, enc, bufferSize: 0))
{
var watch = Stopwatch.StartNew();
var s = await TestReaderTests.MeasureAndTime(reader);
watch.Stop();
Console.WriteLine($"{s}; time taken: {watch.ElapsedMilliseconds}ms");
}
}
Console.WriteLine();
Console.WriteLine("Using PipeTextReader/MemoryMappedPipeReader (leased buffer)");
for (int i = 0; i < REPEAT; i++)
{
var mmap = MemoryMappedPipeReader.Create(path);
using (mmap as IDisposable)
using (var reader = PipeTextReader.Create(mmap, enc))
{
var watch = Stopwatch.StartNew();
var s = await TestReaderTests.MeasureAndTime(reader);
watch.Stop();
Console.WriteLine($"{s}; time taken: {watch.ElapsedMilliseconds}ms");
}
}
Console.WriteLine();
Console.WriteLine("Using StreamReader/FileStream");
for (int i = 0; i < REPEAT; i++)
{
using (var reader = new StreamReader(path, enc))
{
var watch = Stopwatch.StartNew();
var s = await TestReaderTests.MeasureAndTime(reader);
watch.Stop();
Console.WriteLine($"{s}; time taken: {watch.ElapsedMilliseconds}ms");
}
}
}
public async ValueTask <int> TestFileStream()
{
int x = 0;
for (int i = 0; i < LoopCount; i++)
{
using (var reader = new StreamReader(path, encoding))
{
x += (await TestReaderTests.MeasureAndTime(reader)).Length;
}
}
return(x);
}
public async ValueTask <int> TestMemoryMappedPipe()
{
int x = 0;
for (int i = 0; i < LoopCount; i++)
{
var mmap = MemoryMappedPipeReader.Create(path);
using (mmap as IDisposable)
using (var reader = PipeTextReader.Create(mmap, encoding))
{
x += (await TestReaderTests.MeasureAndTime(reader)).Length;
}
}
return(x);
}