--- title: Cloudflare frees 100TB from DNS caches, giflib gets... description: Cloudflare squeezed 100 terabytes out of its DNS cache fleet with five memory tricks that would work in any Rust codebase. Google used Gemini to rewrite giflib... canonical: https://daily.dev/posts/cloudflare-frees-100tb-from-dns-caches-giflib-gets-ai-rewritten-into-rust-nbsapaoud twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Cloudflare frees 100TB from DNS caches, giflib gets AI-rewritten into Rust | daily.dev og:description: Cloudflare squeezed 100 terabytes out of its DNS cache fleet with five memory tricks that would work in any Rust codebase. Google used Gemini to rewrite giflib... og:url: https://daily.dev/posts/cloudflare-frees-100tb-from-dns-caches-giflib-gets-ai-rewritten-into-rust-nbsapaoud og:image: https://api.daily.dev/og/posts/NBsAPaOUD.png og:image:alt: Cloudflare frees 100TB from DNS caches, giflib gets AI-rewritten into Rust og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Cloudflare frees 100TB from DNS caches, giflib gets AI-rewritten into Rust **[Rust Digest](https://daily.dev/sources/rust_digest)** · 4 min read · 24 upvotes · 1 comments ## Summary Cloudflare squeezed 100 terabytes out of its DNS cache fleet with five memory tricks that would work in any Rust codebase. Google used Gemini to rewrite giflib into memory-safe Rust and validated it against 200 million fuzzing iterations, catching a bug the original C had for years. The Rust Foundation named its first five Maintainers in Residence, funding Clippy, rustdoc, and toolchain work that usually goes unpaid. Rustdoc got 33% faster in a week from four PRs, and the never type finally stabilized on nightly after a decade of false starts. ## Content **TLDR:** Cloudflare squeezed 100 terabytes out of its DNS cache fleet with five memory tricks that would work in any Rust codebase. Google used Gemini to rewrite giflib into memory-safe Rust and validated it against 200 million fuzzing iterations, catching a bug the original C had for years. The Rust Foundation named its first five Maintainers in Residence, funding Clippy, rustdoc, and toolchain work that usually goes unpaid. Rustdoc got 33% faster in a week from four PRs, and the never type finally stabilized on nightly after a decade of false starts. --- ## Cloudflare cuts 1.1.1.1's DNS cache memory by 56% per entry Five successive optimizations to Big Pineapple's DNS cache layer - replacing Vec/String with Box<[T]>/Box, offset-based record storage, dropping redundant owner names, boxing large enum variants, and storing records in raw wire format - dropped per-entry memory from 953 to 420 bytes. That's a 58% cut in allocations, 43% more insert throughput, and 19% lower lookup latency. Across Cloudflare's fleet this freed roughly 100 terabytes of memory, with p99 per-instance memory falling from 9.3GB to 5.3GB. None of these tricks are exotic - they're the kind of thing worth checking in your own hot-path structs. [Read more](https://daily.dev/posts/UdwQ79LxW) ## Google rewrites giflib into Rust with Gemini, catches a bug C missed for years Google's pilot combined one-shot LLM translation with an autonomous FFI-fixing feedback loop to turn the giflib C library into a memory-safe, ABI-compatible Rust drop-in. They threw 30 million real GIFs and over 200 million differential fuzzing iterations at it over six days with zero logic deviations, and the process caught a pre-existing out-of-bounds write bug from an old internal patch. Production systems that had already migrated to the Rust fork turned out to be immune to CVE-2026-26740, discovered in the original C code before public disclosure. Performance stayed neutral or improved, and removing sandboxing overhead actually cut tail latency. The rewrite is open-sourced as giflib-rs. [Read more](https://daily.dev/posts/Ea5sjvbPn) ## Rust Foundation funds its first Maintainers in Residence Five maintainers got full or half-time funded positions and two got grants, covering Rustup, Clippy, the compiler, rustdoc, and the standard library - the unglamorous plumbing everyone depends on and nobody wants to pay for. The program draws from a $350,000 Maintainers Fund backed by Google, AWS, OpenAI, and the Rust Project Leadership Council, with a full-time position costing roughly $120,000 a year. Positions run at least 12 months, and more announcements are expected. [Read more](https://daily.dev/posts/bTsclio9w) ## Rustdoc gets 25% faster wall-time, and the never type stabilizes A single week of investigation into a stack-overflow regression led to four PRs that made Rustdoc 25% faster in wall time (a 33% speedup), with up to 40% gains on crates like hyper and bitmaps - the fix was skipping unnecessary trait-impl inlining before filtering. Separately, the never type (!) stabilized on nightly after roughly 10 years of being unstable and five failed attempts, closing out one of Rust's longest-running language proposals. Both land on stable soon: rustdoc's fix in 1.99. [Read more](https://daily.dev/feed-by-ids?id=tZoO3GcFi&id=fVlyuVf4n) --- ## Also notable - **Formal verification creeps into production Rust:** AWS's Cedar authorization language, written in Rust, is verified against a Lean spec using 100 million nightly differential random tests, and tools like Verus (Z3-backed Rust verification) are pushing spec-driven development past LLM-as-judge and code review. [Read more](https://daily.dev/posts/WgglVWetY) - **Connect protocol gets a Rust implementation, built mostly by Claude:** Anthropic's connect-rust joined the Connect project as an official implementation, passes all 3,600 server and 6,872 client conformance tests, runs in production at Anthropic despite being pre-1.0, and beat tonic's throughput by about a third on a decode-heavy benchmark - notably, it was built in six weeks with Claude Opus 4.6 doing most of the work. [Read more](https://daily.dev/posts/apuQZC6S4) - **Ubuntu 26.04 defaults to uutils coreutils and sudo-rs:** Canonical's Rust migration plan has ntpd-rs replacing chrony by 28.04 and a new Rustls-based certificate-revocation project (UPKI) targeting Ubuntu 26.10. [Read more](https://daily.dev/posts/6IRuLSi7D) - **Compact 64-bit tagged word beats Rust enum by 17% in a toy interpreter:** Swapping a 16-byte tagged enum for a low-bit-tagged 64-bit word in the Plush interpreter made every benchmark faster, with memory-heavy tests like binary_tree gaining the most from halved object sizes and better cache locality. [Read more](https://daily.dev/posts/vl1PBOn5a) - **array-ref crate compromised via typosquatted proc-macro1 dependency:** A malicious build.rs script downloaded a platform-specific payload and enumerated browser login data in Chrome, Brave, and Edge, with infrastructure overlapping prior DPRK-linked npm attacks on Axios and Nx. [Read more](https://daily.dev/posts/W1lrnT4Xl) --- Tags: [#rust](https://daily.dev/tags/rust), [#cloudflare](https://daily.dev/tags/cloudflare), [#dns](https://daily.dev/tags/dns) [View this post on daily.dev](https://daily.dev/posts/cloudflare-frees-100tb-from-dns-caches-giflib-gets-ai-rewritten-into-rust-nbsapaoud) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/cloudflare-frees-100tb-from-dns-caches-giflib-gets-ai-rewritten-into-rust-nbsapaoud","headline":"Cloudflare frees 100TB from DNS caches, giflib gets AI-rewritten into Rust","text":"Cloudflare squeezed 100 terabytes out of its DNS cache fleet with five memory tricks that would work in any Rust codebase. 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