A recent post titled 'Io_uring Without Readahead' sparked a detailed discussion on Hacker News about low-level disk I/O optimizations. Engineers weighed the trade-offs of bypassing default kernel readahead behavior, comparing `io_uring` performance against traditional `preadv` calls and custom buffer management.
For early-stage founders, this technical hair-splitting illustrates a classic engineering trap. While squeezing microsecond gains out of asynchronous file I/O sounds impressive on paper, spending precious runway fine-tuning system-level storage calls before achieving product-market fit is usually a distraction from building customer-facing value.
From a backer's perspective, a team obsessing over custom kernel I/O is either building critical deep-tech infrastructure or burning cash on premature optimization. Unless your startup's primary offering is a custom database engine, relying on standard operating system defaults keeps engineering velocity high and capital efficiency intact.