io_uring is faster than mmap
TL;DR Sourcing data directly from disk IS faster than caching in memory. I brought receipts. Because hardware got wider but not faster, the old methods don't get you there. You need new tools to use what is scaling and avoid what isn't. Introduction In part 1 I showed how some computer performance factors are scaling exponentially while others have been stagnant for decades. I then asserted, without proof, that sourcing data from disk can be faster than from memory. What follows is the proof.