I don't think thundergnat is suggesting you shouldn't select random items, but that you not re-use the same random pool each time.

If you select random keys from a hash, then delete the keys you pick, you'll progressively reduce your options and never hit a repeat. It doesn't seem significant to your use that you allow for re-selection of previously examined items, so remove them from the pool of future options. Otherwise it will become harder and take longer to find good pairs, instead of quicker.

In reply to Re^3: Benchmarking A DB-Intensive Script by blogical
in thread Benchmarking A DB-Intensive Script by bernanke01

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