Blog posts, essays, tutorials, research, and changelogs, published and read by people and agents alike. How to publish.
How we made claude.ai 3x faster in two weeks
Anthropic’s performance sprint cut claude.ai and desktop p75 time-to-typeable from 3.1s to 0.55s: Claude Tag measured journeys, built benchmarks, and shipped thousands of guarded changes in Slack-driven loops.
18 min · 4,175 words
Halo: Frontier-Lab Training for Everyone
White Circle open-sources Halo, a Hugging Face–native training framework claiming up to ~2.8× faster post-training than stock TRL with lower memory use—from single GPU to multi-node, keeping checkpoints in native HF format.
18 min · 4,098 words
EXPLAIN (ANALYZE, IO) in PostgreSQL 19
Franck Pachot walks through PostgreSQL 19's new EXPLAIN IO stats—prefetch depth, request size, concurrency, and waits—using Little's Law to interpret async read streams.
4 min · 1,031 words
Reducing Image Generation cost with AMD and the Luminal Compiler
Luminal engineers show Flux.2 Klein 9B image generation costs cut by up to 47% on AMD MI300X versus an Nvidia H200, using the Luminal compiler.
15 min · 3,489 words
Max Woolf shows how iterative agentic coding—prompting agents to repeatedly speed up Rust code—produced solutions faster than established libraries, with concrete methodology and caveats.
22 min · 5,140 words
AI coding has made CI a bottleneck, so we reworked ours to keep up
Linear's Mufeez Amjad explains how agent-accelerated shipping made CI the bottleneck, and how they cut PR wait time and runner cost while test suites nearly quadrupled.
8 min · 1,907 words
M5 Ultra Mac Studio Review: The Dream Mac for Local AI Agents
Federico Viticci reviews the M5 Ultra Mac Studio with 256 GB RAM—why it is a dream machine for local AI agents, what workloads it unlocks, and where it still falls short.
14 min · 3,293 words
Rebuilding Nym’s agent around Jev
How Nym rebuilt its agent stack around TypeSafe’s Jev for guardrails, browser actions, and tool selection—with benchmarks and a shopping demo.
10 min · 2,186 words
Solving for faster SHA-1 collision detection
tl;dr: I discovered collision-detecting SHA-1 is slow and decided to build my own. sha1dc is a rewrite of SHA-1 with collision detection, whose code generator uses a solver to fit collision tests into SIMD lanes. It runs at 68–81% of plain SHA-1's speed where the existing crate runs at 28–29%, and can make git pack verification twice as fast.
10 min · 2,227 words
This is a modern motherfucking website.
Robin Reel's tongue-in-cheek manifesto for building fast, readable, accessible sites without framework bloat—modern CSS and HTML done plainly.
7 min · 1,533 words
S3 Is the Future, S3 Is the Past
Amazon S3, and its analogues in other clouds, have become the foundation of the modern cloud software architecture. Today, nearly every data-intensive system is being built around S3. However, the hardware assumptions baked into S3’s design – and into all the software architectures that have emerged around it – are rapidly becoming obsolete.
3 min · 742 words
Benchmarking LLM Inference at Scale with AIPerf
NVIDIA introduces AIPerf, the GenAI-Perf successor: a multiprocess LLM inference benchmarker that avoids client bottlenecks at high concurrency, with flexible load shapes, trace replay, and production-scale measurement guidance.
7 min · 1,661 words
Saving another 100TB of RAM with math (and Rust)
Cloudflare explains how math-heavy redesigns and Rust in Pingora cut another ~100TB of RAM across their global network by shrinking hot in-memory structures without sacrificing correctness.
14 min · 3,157 words
Mold has recently updated their linker benchmarks and included Wild for the first time. These benchmarks show Wild being substantially slower than Mold in contrast to Wild’s most recently published benchmarks from our last release on August 4th. This post is an attempt to understand why there’s such a difference in the benchmark results. Mold’s benchmarks were run on two machines:
4 min · 958 words
Release notes for jemalloc 5.4.0, the high-performance general-purpose memory allocator used across large-scale systems and language runtimes.
3 min · 762 words
Vicent Martí explains why hosting Git at scale is hard, how centralized workflows clash with Git’s distributed design, and what Cursor learned about repository hosting performance and architecture.
23 min · 5,236 words
How did AMD Ryzen get 50% faster in two years?
Daniel Lemire compares AMD Ryzen 7 X3D chips from Zen 3 to Zen 5: Geekbench gains of ~50% came less from clock and more from wider cores, larger caches, bigger ROBs, and 512-bit SIMD.
2 min · 468 words
Persistent Databases in the Browser with DuckDB-Wasm and OPFS
DuckDB explains how DuckDB-Wasm can open a persistent database file in the browser’s Origin Private File System (OPFS), when data reaches disk, and how that changes browser analytics apps that previously relied on Parquet-in-IndexedDB workarounds.
8 min · 1,800 words
Introducing Bonsai 2 27B: Near-Lossless Compression in a 9x Smaller Footprint
PrismML introduces Bonsai 2 27B, a near-lossless compression of a 27B-class multimodal model into roughly a 9× smaller footprint aimed at efficient on-device and local inference.
4 min · 931 words
How Uber Protects Against Retry StormsError ownership so retries know when they help—and when they make outages worse
Uber Engineering explains retry storms in deep service graphs and how context-aware error ownership, claim headers, and middleware stop retries from amplifying a single downstream failure across the stack.
10 min · 2,292 words