> In 3.9 however, we get the following:
>     Run 1:  883 msecs
>     Run 2: 1311 msecs
>     Run 3: 1632 msecs
>     Run 4: 2006 msecs
> After four runs, we need 2.5 times as long as the first run. Something is 

Andreas,

that would be my 2 second delay. I do like to have a few windows open. 
Now if your machine is 3x as powerful as mine which is quite likely then 
that would be my problem

thanks for looking into it

best regards

Keith
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