#Bytes

Measuring what the Next.js App Router prefetches on a prerendered marketing site, what the _rsc query token is keyed on, and why every prefetch here downloads a whole page.

I measured our own template. 1,656 bytes of document, 237 per search section, 333 per listing row, plus the title once and the URL twice. The ceiling that saves us is in a different file and was put there for another reason.

UDP maximum datagram size fragmentation example: test limits, trigger IP fragmentation, measure loss, and recover datagrams across networks.

TL;DR: Amazon SQS does not bill per message. It bills per request, and every 64 KiB chunk of payload...

Goose (HN's top story today) claims a 29-byte record vs 160 in C++, exact lifetime errors, and 3.3x over idiomatic C++. I ran the release binary: the order is exactly 29 bytes, enums pack 27 vs 51, the tamper test behaves as documented — and my own sieve…

Series: nosqlite devlog, Part 4 By the end of the third article, nosqlite had empty...

TL;DR: CPython stores strings using PEP 393 (Flexible String Representation) rather than UTF-8. It...

Naive byte-range caching can waste gigabytes of origin bandwidth on small requests. We rebuilt our cache architecture in Pingora to coordinate partial fetches automatically, cutting R2 p99 latency in half.

I set out to swap an interpolated cache key for string.Create to cut allocations. It allocated exactly the same. Here's what was actually wasting the memory.

The happy path for vision in .NET is short now. With Microsoft.Extensions.AI, an image is just...

How Duong Phuc Khanh (Kido) replaced bloated relational habit logs with 46-byte Redis/Valkey Bitmaps and CPU hardware POPCNT instructions, dropping p99 streak latency from 140ms to 0.08ms.

I build a browser tool that resizes photos and signatures for Indian exam and job application forms....

Short answer: S3-compatible object storage is a good home for AI-generated images when a worker...

Certain programming problems are difficult to solve procedurally even using structured code, but simple to solve using abstract finite state machines (FSMs) [1].…

How a branch-free loop and byte-space arithmetic let GitHub case-fold every byte of code search at >45 GiB/s on a single core.

At WWDC 2025, Apple announced macOS 26 Tahoe. One of the new features in macOS Tahoe is a new disk image format: ASIF. Designed for use with virtual machines (its documentation lives under the Virtualization framework), ASIF takes a lot of inspiration…