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wire 2026-07-06
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$ the-wire · showcase

CARGO SWAPS SIPHASH FOR FXHASHER, MIRI RESTRUCTURES SOCKET SHIM

By RepoJournal · Filed · About Rust · Composed from the cited sources · methodology

Kobzol WhySoBad renovate[bot]
3 people shipped this
Kobzol @Kobzol 1 cited WhySoBad @WhySoBad 1 cited renovate[bot] @renovate[bot] 1 cited

Cargo's adopting a faster hashing algorithm to cut build time noise, while Miri refactors its virtual socket implementation to match the codebase's established patterns.

Cargo is replacing SipHasher with Fxhasher in its hottest HashMap and HashSet instances [1], a move born from performance profiling that showed SipHasher was a measurable drag on bors builds. This is the kind of surgical optimization that compounds across millions of builds. Meanwhile, Miri is consolidating private socket methods into an EvalContextPrivExt trait [2], eliminating inconsistency across shims. A major rollup merged to rust-lang/rust [3] pulls in 21 PRs including BorrowSanitizer retag support and improved E0277 diagnostics, plus MIR type cleanup that strips unnecessary Hash derives [4]. TypeVisitable got generalized to handle boxed slices and fixed-size arrays [5]. Rustup's dependency locks refreshed this cycle [9]. On the crates.io index, rlg-cli, vtcode-commons, and rdif-reset saw updates [6] [7] [8].

Action items

References

  1. [1] Change HashMaps and HashSets in Cargo to use Fxhasher ↗ rust-lang/cargo
  2. [2] Move private methods of virtual sockets to `EvalContextPrivExt` ↗ rust-lang/miri
  3. [3] Auto merge of #158795 - JonathanBrouwer:rollup-vhfdJ4m, r=JonathanBrouwer rust-lang/rust ↗
  4. [4] Rollup merge of #158681 - nnethercote:mir-derives-FIDDLING, r=oli-obk rust-lang/rust ↗
  5. [5] Rollup merge of #158698 - addiesh:oh-a-visitor, r=oli-obk rust-lang/rust ↗
  6. [6] Update crate `rlg-cli` rust-lang/crates.io-index ↗
  7. [7] Update crate `vtcode-commons` rust-lang/crates.io-index ↗
  8. [8] Create crate `rdif-reset` rust-lang/crates.io-index ↗
  9. [9] Lock file maintenance ↗ rust-lang/rustup

$ ls rust-lang/reviews/ # the step-back reads

the week in review Rust drops d32 support from 32-bit Arm targets the month in review Never type and custom allocators stabilize while rustc refactors repeat
Topics: Rust Full archive → Weekly reviews →

Quick answers

What shipped in Rust on July 6, 2026?
Cargo's adopting a faster hashing algorithm to cut build time noise, while Miri refactors its virtual socket implementation to match the codebase's established patterns. In total, 112 commits, 20 pull requests, and 1 releases landed.
Who contributed to Rust on July 6, 2026?
3 developers shipped this update, including Kobzol, WhySoBad, and renovate[bot].
What were the notable Rust updates?
Change HashMaps and HashSets in Cargo to use Fxhasher, Move private methods of virtual sockets to `EvalContextPrivExt`, and Auto merge of #158795 - JonathanBrouwer:rollup-vhfdJ4m, r=JonathanBrouwer.
♥

$ log @rust-lang --recent

Cargo preserves locked prerelease deps, rustdoc fixes inlined intra-doc links 98 shipped Miri picks up upstream Rust, compiler narrows query stack output 152 shipped crates.io rejects publish tarballs missing target sources 193 shipped Const Range iteration, reexport chains fixed, TWiR 669 lands 119 shipped

$ log --all # elsewhere on the wire

@openclaw Cold-start Gateway diagnostics stop crying wolf, doctor repairs plugin drift Agentic Coding Cline desktop bundles shrink, goose unblocks its own clicks

$ ls showcases/

Rails Django Laravel Node.js Go Vercel Vue.js Kubernetes HashiCorp Arch Linux Linux Anthropic

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