"By far the most surprising feature of their architecture is in Lesson Six, whose essential idea is: The key to speed is to precompute everything and cache It."<p>That made me LOL. Is this really surprising? A symptom of years of high-level web development or similar... ?<p>This is /the/ classical optimisation strategy - since the day of pen and paper computations (anyone remember "log" books?).
I don't know why people keep using reddit as a reference for how to do scaling. Reddit is a slow website with frequent outages. It should be a how not to example if anything.