<p><strong>TLDR:</strong> Fyrox, the Rust game engine, shipped its 1.0 release this week after seven years of development. Google built the Android-to-AirDrop interoperability layer in Rust and had it audited by a third party. Discord open-sourced Osprey, a safety rules engine running 2.3 million rules per second with a Rust coordinator. The Linux kernel is preparing to raise its minimum Rust version to 1.85, and <a href="http://docs.rs" target="_blank" rel="noopener nofollow">docs.rs</a> is cutting its default build targets starting May 1.</p>
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<h2>Fyrox 1.0</h2>
<p>After seven years, Fyrox has a stable release. The engine ships with a Unity-style editor, a node-based scene graph similar to Godot’s, PBR rendering, a full animation system with a new blending state machine, hot reloading, and multiplatform export including web and mobile. A new CLI export tool is included. The project has around 150 contributors and positions itself as the editor-first, beginner-friendly alternative to Bevy — a real distinction given how different the two projects’ philosophies are.</p>
<h2>Google’s Quick Share uses Rust for AirDrop interop</h2>
<p>Starting with the Pixel 10 family, Android’s Quick Share can send and receive files with Apple’s AirDrop. The interoperability layer is written in Rust specifically to avoid the memory-safety bugs that tend to show up in wireless protocol parsers. NetSPI audited it and called it “notably stronger” than comparable industry implementations. It’s peer-to-peer with no server routing, and Google says it wants to work with Apple to eventually support “Contacts Only” mode.</p>
<h2>Discord open-sources Osprey</h2>
<p>Osprey is Discord’s internal safety rules engine, now open source. It evaluates 400 million daily actions at 2.3 million rules per second using a polyglot setup: a Rust coordinator handles traffic and gRPC routing, while stateless Python workers execute rules written in SML, a Python-based DSL. Rules are parsed to an AST at startup to minimize per-event overhead and distributed via ETCD for live updates. Bluesky and <a href="http://Matrix.org" target="_blank" rel="noopener nofollow">Matrix.org</a> have already picked it up.</p>
<h2>Linux kernel moving to Rust 1.85 baseline</h2>
<p>The Rust-for-Linux project has posted patches to raise the minimum supported Rust version from 1.78 to 1.85, which stabilized the Rust 2024 edition and is already the default in Debian 13 Trixie. The bindgen minimum bumps from 0.65.1 to 0.71.1. Patches are on the mailing list now, targeting the Linux 7.1 merge window.</p>
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<h2>Also notable</h2>
<ul>
<li><strong><a href="http://docs.rs" target="_blank" rel="noopener nofollow">docs.rs</a> default targets shrinking:</strong> Starting 2026-05-01, <a href="http://docs.rs" target="_blank" rel="noopener nofollow">docs.rs</a> will only build for x86_64-unknown-linux-gnu by default instead of five targets. Crates needing multi-target docs must explicitly list them in Cargo.toml metadata.</li>
<li><strong>Redox OS new CPU scheduler:</strong> A new Deficit Weighted Round Robin scheduler replaces the legacy Round Robin, delivering roughly 1.5x improvement in operations per second for CPU-bound tasks and a ~48% increase in scheduling throughput.</li>
<li><strong>Toasty async ORM on <a href="http://crates.io" target="_blank" rel="noopener nofollow">crates.io</a>:</strong> Built by the Tokio team, Toasty supports both SQL and DynamoDB, uses derive macros for schema definition, and decouples application schema from database schema. It’s 0.x with breaking changes expected.</li>
<li><strong>BUS1 IPC revived in Rust:</strong> The original BUS1 capability-based IPC system, proposed for Linux over a decade ago in C but never merged, has been rewritten in Rust by its original author — 16 patches, nearly 9,000 lines, posted to the Rust-for-Linux list.</li>
<li><strong>Tail-call interpreter beats hand-written assembly on ARM64:</strong> A developer implemented a Uxn CPU emulator using Rust’s nightly <code>become</code> keyword for guaranteed tail-call optimization, outperforming both the Rust VM and hand-written ARM64 assembly. x86-64 beats the VM but loses to assembly due to register spills. Wasm performance is significantly worse.</li>
<li><strong>Servo 0.0.6:</strong> The Rust browser engine ships incremental box tree layout (reusing cached fragments instead of full rebuilds), DevTools pause/resume for script execution, Pointer Events support, <code>@property</code> CSS rules, and AccessKit groundwork for accessibility.</li>
<li><strong>Meilisearch memory leak traced to allocator mismatch:</strong> A 1.5-year leak was caused by bumpalo misuse and LMDB using the system allocator while Meilisearch used mimalloc v2, preventing page reuse. Switching to mimalloc v3 with its override feature resolved it, with ~13% performance improvement in some benchmarks.</li>
<li><strong>Cloudflare open-sources ecdysis:</strong> A Rust graceful restart library enabling zero-downtime upgrades, covered in a DevOps newsletter alongside GitHub Actions SHA pinning and Airbnb’s staged config rollout system.</li>
<li><strong>pyre:</strong> A new Python runtime porting PyPy’s meta-tracing JIT architecture to Rust, targeting a no-GIL foundation and keeping the MaJIT tracing framework reusable.</li>
<li><strong>Ferrous Systems callgraph analysis for Ferrocene:</strong> To certify a subset of <code>core</code> to IEC 61508 SIL-2, Ferrous built a custom rustc driver with two passes — a pre-monomorphization THIR pass for fast feedback and a post-monomorphization MIR pass for certification-grade analysis — catching panics and unvalidated calls across crate boundaries.</li>
<li><strong>turbovec:</strong> A Rust library with Python bindings implementing TurboQuant (Google Research, ICLR 2026), compressing 1536-dim FP32 vectors 16x to 384 bytes with no training step required. ARM performance is within 2-25% of FAISS; x86 is 1.4-3.7x slower with optimization ongoing.</li>
<li><strong>This Week in Rust 645:</strong> Compiler performance triage shows a net -0.8% improvement across 62 primary benchmarks. New sanitizer targets, library constification improvements, and Clippy lint additions landed this cycle.</li>
</ul>


Rust language updates, async patterns, and systems programming.

Rust Digest

A roundup of Rust ecosystem news: Fyrox 1.0 ships after seven years with a Unity-style editor, PBR rendering, and multiplatform export. Google used Rust for Android Quick Share's AirDrop interoperability layer, which passed a third-party security audit. Discord open-sourced Osprey, a safety rules engine processing 2.3M rules/second with a Rust coordinator. The Linux kernel is moving its minimum Rust version to 1.85. Additional items cover docs.rs target changes, Redox OS's new scheduler, Toasty async ORM, BUS1 IPC rewrite, Servo 0.0.6, a Meilisearch memory leak fix, and more.

Fyrox hits 1.0 after seven years, Rust lands in Android Quick Share