Thanks. I want to know the answer, but not so much that I'm willing to spend the several hours necessary to familiarise myself with a large foreign code base. I

Thanks. I want to know the answer, but not so much that I'm willing to spend the several hours necessary to familiarise myself with a large foreign code base. I was hoping someone here could give a quick top-level explanation. From looking around, though, I think they're caching the user's votes and then just assembling the page on the fly from cache fragments. You could do that pretty quickly. Might be wrong.