Re: Performance and faster idioms

[Charles Yeomans <yeomans at desuetude dot com>]

On Feb 28, 2005, at 2:35 AM, Massimo Valle wrote:

> on 28-02-2005 1:46, Charles Yeomans wrote:
>
>
> > I tried this and there was essentially no difference in execution time
> > on my machine; each took at most 1 tick to execute.
> >
> > The real lesson here is that unless you're doing a lot of iterations,
> > there is no point to worrying about the difference between If and
> > Select Case.  If I had code that requires doing a million conditional
> > blocks, I'd spend my time trying to refactor the code to eliminate the
> > repeated testing.
> I used microseconds to calculate the timing and I continue to get 
> about 3x
> speed on if-then. Using ticks I get larger difference: 9x
>
> I agree with you on trying to eliminate the repeated testing, however 
> to see
> the performance we must do a repeated testing.
> In real world I was able to speed up a lot a graphics drawing routine 
> with
> an if-then block in Paint event.
In the end, this is the only testing that really matters.  Writing 
tests is really for rule-of-thumb generation only.
--------------
Charles Yeomans

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