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The Components of Agent Memory
For Claude to learn from experience, it has to decide what’s worth remembering before it knows what’s next. Here’s how “dreaming” helps it organize memory and correct mistakes.
New
The latest blog posts to take off on Hacker News. 178 posts.
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Firecracker VM Escape: PwnEscape Part 2
Firecracker is supposed to keep untrusted code inside a microVM. We escaped it and achieved code execution as root on the host.
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GitHub's new Git storage architecture
GitHub's new Git storage architecture is built so thousands of agents can push to a single repository at once. Here's how it works.
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Kitty 0.50
kitty is a feature-rich, cross-platform, fast, GPU based terminal. To update kitty, follow the instructions. Recent major new features: Docked windows [0.50]: kitty windows can now be docked to an ...
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Can GROUP BY still be optimized after all these years?
An optimization that made Pivot significantly faster on GROUP BY queries with a Top-K operator above them, and a walkthrough of how analytical databases run GROUP BY in the first place.
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Ubuntu still has not released patch for Linux 0day RCE in almost 3 weeks
No patched kernels are available yet for 22.04, 24.04, or 26.04 despite a CVSS 9.8 rating.
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We halved DNS build delay and cut memory use by 85%
Zone setting changes used to rebuild entire DNS zones, even ones with tens of millions of records. Here is how we built a planner that picks the smallest safe build, cutting full builds by 40%, peak memory by 85%, and halving build delay.
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TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8
CVE-2026-98432 is a CVSS 9.8 remote use-after-free in Linux's IPv4 TCP handshake, fixed upstream Oct 15. RHEL has fixes; Ubuntu's are still in testing.
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It's the memory latency, stupid
When your database CPU is at 100%, what is it actually doing? Memory stalls, CPU caches, and how radix partitioning makes GROUP BY faster.
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Jepsen: ParticleDB 1.1.4
Modern applications often spread state across a variety of systems: databases, caches, queues, data warehouses, search indices, and so on. Coordinating these systems is challenging: caches are often stale, the analytics platform might lag days behind the primary database, the search index might lose data, and…
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Bbtree: Fastest Ordered Map
How bbtree, a drop-in replacement for std's BTreeMap, cuts cache misses, instructions and cache coherence traffic, and how it is kept correct.
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Big Fish: Exploiting a 37-Year-Old Kernel Bug in OpenBSD
Big fish. Small counter. Root shell.
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Libreboot 26.10 "Ominous Olive" released with UEFI, Chromebook support
Libreboot – Libreboot 26.10 “Ominous Olive” released! With full UEFI support.
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Virtual Oxide Labs: Emulating a Full Oxide Rack
Oxide's approach to emulation, simulation, and tiny versions of big things.
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Postgres isn't slow, your storage is
A recap of Sai Srirampur's POSETTE 2026 talk on storage performance in Postgres, with a local NVMe vs. EBS benchmark and the production setup behind it.
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LineageOS 24
You know what's funnier than 24?
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Why DuckDB 2.0 is faster
DuckDB 2.0 alpha vs 1.5.5 on one laptop: recursive CTEs up to 90x, VARIANT 6x faster than JSON text, async I/O 2.4x on S3. What changes, and how to model data to get the speedup. | Reading time: 15 min read
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5x faster Edge Functions: V8 isolates to Firecracker MicroVMs
See how Netlify rebuilt Edge Functions on MicroVMs to deliver lower latency, greater reliability, and faster log delivery.
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Platform-independent SIMD in Go
Go 1.27 adds an experimental platform-agnostic SIMD API
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Topcoat is pushing the boundary of server applications with Rust
Tokio is a runtime for writing reliable asynchronous applications with Rust. It provides async I/O, networking, scheduling, timers, and more.
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Postgres SELECT DISTINCT Does Not Scale
Postgres SELECT DISTINCT performs surprisingly poorly. We explain why and how we mitigated it.
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Linux support is coming to Snapdragon X2 series
Explore the agentic AI PCs, Googlebook laptops, Linux support and partner devices powered by Snapdragon unveiled at Snapdragon Summit 2026.
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Once Claude can measure something, it can make it faster
Inside our performance sprint: the benchmarks Claude built, the loop each Slack thread ran, and the guardrails that let us ship 3,000 changes safely.
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Making Tailscale Faster
Tailscale performance updates reduce memory use, increase throughput, and speed startup with multi-queue, writev, and netmap caching.
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Data-only attacks are easier than you think (2024)
Data-only attacks, those that do not affect a program’s control flow, have long been considered too sophisticated and niche to pose a practical threat. With our research, however, we have built a tool that automatically generates them with surprising ease. We explain how such attacks work, and why our tool, Einstein…
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Fearless SIMD v1.0
Fearless SIMD v1.0 is here
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Software sandboxing: The basics (2025)
Diving into the territory of software sandboxing is diving into mostly uncharted territory. The necessary pieces to implement good sandboxing in your software are scattered all-around and the pioneers haven’t yet gathered enough knowledge into an unified mappa mundi that can guide new sailors through some well…
29
Saving another 100TB of RAM
Cloudflare's global network is immense but not limitless. As we look for small ways to trim our resource usage, we sometimes get lucky and we can cut significantly more. Here’s how we reduced one of our Pingora-based service's RAM usage with statistics.
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The scourge of x86 emulation
Welcome to the first feature article on our site. We’re going to cover an ongoing problem with x86 emulation that affects every application that we emulate. This comes down to a single over-arching term that has wide-reaching ramifications; Emulating the x86 Total Store Ordering memory model (x86-TSO) .