Who contributed to Elixir & Phoenix on October 19, 2026?

2 developers shipped this update, including preciz and mandar1045.

What were the notable Elixir & Phoenix updates?

Optimize Base validation with SWAR case folding and 8-byte streaming and Keep formatter output stable for comments inside tuple arguments.

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Oct 19, 2026

$ the-wire · showcase

Base validators go SWAR, formatter output stabilizes

By RepoJournal · Filed 06:57 UTC on October 19, 2026 · About Elixir & Phoenix · Composed from the cited sources · methodology

2 people shipped this

preciz @preciz 1 cited

mandar1045 @mandar1045 1 cited

Elixir rewrote Base16/32/64 validation around SWAR word checks and restored a comment check that keeps mix format idempotent for inline tuple arguments.

Optimize Base validation with SWAR case folding and 8-byte streaming elixir-lang/elixir

by preciz

Validation now case-folds with an ASCII `bor 0x20` (and the 8-byte `0x20202020202020` word form) and streams 8 bytes at a time via `<<c, w::56, rest::binary>>` instead of slicing binaries upfront, collapsing the high-bit gate and range mask into one branch. The PR reports it is faster, uses less memory, and shrinks `Elixir.Base.beam` by 14.5% (-31.1 KB).

Keep formatter output stable for comments inside tuple arguments elixir-lang/elixir

by mandar1045

A call whose last argument is a tuple or bitstring is tested for a newline after the opening bracket to decide if it can start as `foo({`; the comment check (`eol_or_comments?`) dropped in #15893 is back, using comment metadata. Without it, the first `mix format` and the second picked different layouts.

$ ls elixir/reviews/ # the step-back reads

the week in review Phoenix rewrites every CI workflow to hardened patterns the month in review Phoenix adds CI test summary formatter

Full archive → Weekly reviews →

Quick answers

What shipped in Elixir & Phoenix on October 19, 2026?: Elixir rewrote Base16/32/64 validation around SWAR word checks and restored a comment check that keeps mix format idempotent for inline tuple arguments. In total, 2 commits and 2 pull requests landed.
Who contributed to Elixir & Phoenix on October 19, 2026?: 2 developers shipped this update, including preciz and mandar1045.
What were the notable Elixir & Phoenix updates?: Optimize Base validation with SWAR case folding and 8-byte streaming and Keep formatter output stable for comments inside tuple arguments.

♥

$ log Elixir & Phoenix --recent

2026-10-22 Algorithm L replaces inside-out shuffles in Enum 3 shipped 2026-10-21 Base validation regression fixed, formatter comments stay put 16 shipped 2026-10-20 Formatter bugs that changed program meaning, and a LiveView assign that always fired 25 shipped 2026-10-18 Formatter stops eating comments, protocol consolidation unbreaks 10 shipped

$ log --all # elsewhere on the wire

Alignment & Post-training 2026-10-22 verl standardizes low-precision rollout kernels on DeepGEMM Agent Security 2026-10-22 Guardrails exposes hooks over HTTP, certifi floor raised in agent-scan

$ ls showcases/

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