Exactly the same code, high difference run time?

Hallo everyone,

I have built a recursive code, which already run untill termination. The recursive code has resulted around 300.000.000 rows. At that time, it run about 8 hours untill termination.

Yesterday, I tried to run again the code, and it ended after 26 hours. But with exactly the same result.. All correct.


Is that normal? I am thinking, something must be run randomly, so that the comparing between the records sometimes luckily fast, sometimes unluckily slow.

Thank you for your comments for this optimization theme.

Best regards,
Ratna