Linus Torvalds submitted a set of kernel patches that address a page-cache contention bug causing memory slowdowns on multi-core, multi-thread systems. In his Git submission, Torvalds said the code, test programs, review and first draft of the accompanying text were produced with Claude Code, an AI coding assistant, under his direction. The bug, known since 2024, involves atomic reference-count updates to a shared cache line that force processor cores to compete, slowing performance in workloads with many concurrent small reads.
zdnet.com
· 2026-10-13
An engineering sample of AMD's never-released Ryzen 9 5900X3D has appeared on the Chiphell forums, showing 128MB of L3 cache from 64MB of 3D V-Cache stacked on one of its two core complex dies. CPU-Z data also shows a clock speed near 4.65GHz, suggesting the chip could have nearly matched the retail Ryzen 9 5900X's boost clock. AMD had teased a 12-core '3D Chiplet Prototype' at Computex 2021 claiming up to 15% faster gaming performance than the standard 5900X.
tomshardware.com
· 2026-10-03
A developer working with collaborator stonerl on a full-speed Game Boy emulator for the Playdate console has published a set of advanced optimization techniques discovered during that project. The tips cover how the Playdate's CPU and small instruction cache behave, including the finding that compiling with -Os instead of -O3 and shrinking core code to fit within the 4KB (or 16KB on Rev B) instruction cache can dramatically boost speed.
devforum.play.date
· 2026-10-02
An unconfirmed SKU table for Intel's upcoming Nova Lake desktop CPUs lists seven models, three carrying a 'BFC' tag believed to denote a big last-level cache feature. The flagship Core Ultra 9 4970K BFC reportedly has 28 cores (8 P-cores, 16 E-cores, 4 LPE-cores), a 125W TDP, and a 32-EU integrated GPU, with most other models sharing that same iGPU except the Core Ultra 5 4650KF, which has none. The table omits the rumored 52-core model, which other reports suggest will launch later for high-end desktop users.
tomshardware.com
· 2026-10-02
DeepSeek has published a series of KV cache optimizations—including MLA architecture, Compressed Sparse Attention, and now CSA2 with cross-layer reuse and FP4 caching—that reportedly shrink cache memory footprint per token by roughly 437x compared to its earlier V1 model. These techniques reduce the VRAM needed to serve long-context sessions such as coding assistants, and the report says other labs have begun using similar approaches without crediting DeepSeek.
insufferable.dev
· 2026-09-30
Cloudflare has launched support for the HTTP Vary response header within its Cache Rules feature, available to customers on every service tier. The update lets origin servers specify which request headers may affect a response, while giving Cloudflare customers control over how those variations are handled in caching—whether by normalizing header values, preserving exact values, or bypassing the cache entirely.
blog.cloudflare.com
· 2026-09-23
Android Authority found Spotify developing a 'Cache Limit' feature for its Android app, letting users set a maximum size for the app's temporary storage cache. The tool would warn that smaller limits increase mobile data use and could affect playback, while suggesting a default size for balance. Downloaded music and podcasts stored offline would remain unaffected by this cache limit.
androidauthority.com
· 2026-09-23
Testing by Bilibili channel Homolab found that the 1TB iPhone 18 Pro Max, which uses QLC NAND, suffers major performance drops compared to the 512GB TLC-based iPhone 18 Pro. Once its SLC and secondary TLC caches are exhausted, sustained writes fall to about 79.4 MB/s and can dip as low as 25.6 MB/s, worsening to just 1.1 MB/s once the drive is 60% full.
tomshardware.com
· 2026-09-21
DeepSeek released V4.1 Flash, a model initially mistaken for a minor update but revealed via its technical report to be a significant architectural overhaul, effectively a V5-class release. It achieves near 420 tokens/second throughput while compressing KV cache by 4x through techniques including cross-layer compression, sparse attention indexing optimizations, and FP4 precision, alongside a YOCO-inspired prefill design that only activates 8B parameters during prefill versus 16B during decode across its 40 layers.
zartbot.github.io
· 2026-09-17
CloudX built and released cloudx-io/setup-go, a drop-in replacement for GitHub's official actions/setup-go, after finding that the official action caused parallel jobs to interfere with each other and repeatedly pull stale cache data. In backtests on CloudX's monorepo running lint, test, and build jobs in parallel, the new action eliminated an estimated 86% of unnecessary work performed by the default setup, cutting test job runtimes by 69%.
cloudx.ai
· 2026-09-16
Microsoft Outlook users encountering the 'Your message can't be displayed right now' error can resolve it by clearing their cache, whether they use the web version or the desktop client. The fix forces Outlook to rebuild fresh copies of emails without deleting any messages, calendar events, or contacts.
engadget.com
· 2026-09-14
A new textbook titled Foundation Model Engineering has been released, aimed at AI engineers and research-minded readers who want to understand foundation models beyond basic API use. It ties together topics like attention, mixture-of-experts, RLHF, multimodality, long-context inference, retrieval-augmented generation, and agents into a single engineering narrative, using PyTorch examples, quizzes, and interactive visualizers.
sungeuns.github.io
· 2026-09-14
GoKawiil