TeraCopy.exe Copy G:\folder1\ I:\folder2\)įastcopy 38 secs (ex. fastcopy.exe /auto_close G:\folder1 /to=G:\folder2)įile: 732,909,568 bytes (698 MB), 1 ISO file copied to external USB disk.
TeraCopy.exe Copy G:\folder1\ G:\folder2\)įastcopy 19 secs (ex. After a couple of passes here are the averages from the tools I played with:įile: 732,909,568 bytes (698 MB), 1 ISO file copied to different directory on the same internal disk. PowerShell was used to capture the start and stop times. No special setup was done (make up your own mind if that invalidates/validates the test), only to input the command into a batch file to execute. All copies were performed between a internal 7200 RPM Sata II disk and an external USB 2.0 drive or on the same internal drive itself where indicated. I ran through a couple of tests on a Windows Vista 64-bit SP2 box to do some comparisons. Using (var stream = File.From a performance standpoint only, xcopy or robocopy will give you similar results. Public bool Save(Socket socket, Stream stream)īool Save( socket, string filename) Socket.BeginReceive(buffer, 0, size, .None, InternalWrite, buffer) Stream.Write((byte)ar.AsyncState, 0, read) ManualResetEvent done = new ManualResetEvent(false) So you want to use an integer multiple of 4mb.Īdditionally if you use asynchronous IO you can fully take advantage of the large buffer size. For x86/圆4 machines this can be set to either 4kb or 4mb. You can get much better disk performance by using a buffer that is an integer multiple of 64kb.Īdditionally, you can get a boost from using a buffer that is a multiple of your CPUs underlying memory page size.
This means that when you write a single byte to disk Windows will actually write a block between 512 bytes and 64 kb in size. Operating systems write files to disk in clusters. Most of the time it takes to write data to disk is spent seeking, so using a larger buffer will reduce your average seek time per byte.
One common mistake when using streams is to copy a byte at a time, or to use a small buffer.
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