Orders of magnitude

[Christian Tismer]

Robert Brewer wrote:

> I wrote:
> 
> I'm dedup'ing a 10-million-record dataset, trying different approaches
> for building indexes. The in-memory dicts are clearly faster, but I get
> Memory Errors (Win2k, 512 MB RAM, 4 G virtual). Any recommendations on
> other ways to build a large index without slowing down by a factor of
> 25?

So, here we go.
The attached script processes a gigabyte of data, one
million records, in about a minute on my machine, and
finds the single duplicate.

ciao - chris

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