Yes: row traversal (no hopping around in memory and causing cache flushes) and block size reads/writes are a big deal. Luckily they're easy enough to do right e

Yes: row traversal (no hopping around in memory and causing cache flushes) and block size reads/writes are a big deal. Luckily they're easy enough to do right every time once you know. I used to take some flak from the "premature optimization blah blah" side of the house on occasion.