Thursday, May 4, 2006, 1:27:49 PM, Dennis Cote wrote:

> More mysteries. To investigate this low insert performance under WinXP I
> wrote a simple test program that loops writing one character to a file
> and then flushing the file. The strange thing is that it seems to 
> alternate between two different run times ...

Your program...

$ flushtst
15 seconds, 67 flushes/sec

$ flushtst
26 seconds, 38 flushes/sec

$ flushtst
26 seconds, 38 flushes/sec

$ flushtst
27 seconds, 37 flushes/sec

$ flushtst
27 seconds, 37 flushes/sec

Add the line:

    DeleteFile("test.txt");

in front of the CreateFile() call...

$ flushtst
15 seconds, 67 flushes/sec

$ flushtst
14 seconds, 71 flushes/sec

$ flushtst
13 seconds, 77 flushes/sec

$ flushtst
12 seconds, 83 flushes/sec

e


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