Thanks, I understood it uses hash tables - I've done the same myself, but never on such a large scale. This post sums it up: http://news.ycombinator.com/item?id

Thanks, I understood it uses hash tables - I've done the same myself, but never on such a large scale. This post sums it up: http://news.ycombinator.com/item?id=513259 http://news.ycombinator.com/item?id=513259