Didn't they recently publish a blog post saying "we have caches at every layer?" Yes: <a href="https://signalvnoise.com/posts/3112-how-basecamp-next-got-to-be-so-damn-fast-without-using-much-client-side-ui" rel="nofollow">https://signalvnoise.com/posts/3112-how-basecamp-next-got-to...</a><p>1. I wonder how large their CPU time budget would be without all the caching.<p>2. Of course they're right. Being twice as fast is generally irrelevant, unless CPU is the bottleneck. We call it O(n), not kO(n), because the k means so little.