Willi Richert wrote:
>
> I have written an ftp-client (connected to the ftp-server residing at
> the same computer) which I tried to measure how fast it can handle I/O.
> I used getCurrentTimeMillis() (or similar) which gave me for the same
> config (retrieve 1meg, same file) sometimes values that differed by a
> factor of 2.
> Now, how can I get "valuable values". Maybe I missed a similar
> discussion, so I would be thankful for every pointer.
To explore a couple of obvious questions:
1) Are you sure the different values are wrong? Have you stood by with a
stopwatch to compare what the program is reporting with what is really
happening?
2) Is the time of what you're measuring long enough to make minor
variations insignificant?
Perhaps the most important caveat is to realize that a call that reports
milliseconds or microseconds or whatever isn't necessarily accurate to
the millisecond or microsecond... it's only accurate to the resolution
of the underlying clock. If, to get a little extreme, your system ticker
is counting off in tenths of seconds, then you're always going to get a
time that's accurate to + or - 1/20th of a second.
Nathan
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