So if the outer loop, 'n' is the only 'big loop', try putting a broadly scoped counter inside each of the 'little loops' (a unique counter for each), and prove to yourself that they're not running away by mistake. ...just one idea. Another is to check how many times you're calling that grep and the sort, and for how many elements. Each of those is an implicit loop.

The idea is to test your theory that the complexity is O(n), and in testing, you may discover that something is not what it seems. I'm not suggesting that your theory is wrong, but that maybe the implementation doesn't match the theory.

If I were hunting down the problem myself, I would be very interested in how many iterations each of the loops is running through. Using a counter variable for each loop, and scoping it to a broad scope so it doesn't reset, and then checking it at the end of the run, may smoke out the mole.


Dave

In reply to Re^5: Some code optimization by davido
in thread Some code optimization by roibrodo

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