how to compare 2 very large textfiles

[Richard Gaskin]

Alex Tweedly wrote:

> So I tried the sort + compare version. It is slightly slower than the
> array technique up to around 10,000 lines, pretty much the same up to
> 20,000 lines and then (sometimes) starts to edge ahead after that. I
> gave up trying at 40,000 lines :-)
>
> But if the data had been sorted already, or had to be sorted for some
> other reason, then it would be roughly twice as quick as the array method.

Very useful to know.  Thanks for taking the time to test that.

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  Richard Gaskin
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