Who contributed to Elixir & Phoenix on August 13, 2026?

4 developers shipped this update, including NelsonVides, Alexander Gubarev, preciz, and github-actions[bot].

What were the notable Elixir & Phoenix updates?

Optimize URI.encode_www_form/1 and RFC 3986 query encoding, Fix struct key malformed error message, and Fix Task.yield_many/2 waits too long or forever when :limit exceeds task count (#15737).

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The Wire · Showcase

URI ENCODING GETS 10X SPEEDUP AS PHOENIX PATCHES BOOT CRASH

By RepoJournal · Filed 07:01 UTC on August 13, 2026 · About Elixir & Phoenix

4 people shipped this

Alexander Gubarev @AlexGx 2 cited

NelsonVides @NelsonVides 1 cited

preciz @preciz 1 cited

github-actions[bot] @github-actions[bot] 1 cited

Elixir landed a massive optimization for URL encoding that hits 10x gains on empty strings, while Phoenix 1.8.11 fixes a critical startup failure.

The biggest move is a URI encoding rewrite [1] that rewrites the loop behind encode_www_form/1 and RFC 3986 query encoding, delivering dramatic speedups across the board. On an M4 Mac, empty string encoding jumped from 63.9 to 6.3 microseconds (10.15x faster), and larger payloads saw 3x to 5x improvements. The optimization splits cleanly from a proposed SWAR fast path, meaning this is the conservative win you deploy without hesitation. Meanwhile, Phoenix 1.8.11 [5] shipped a critical fix for the framework crashing on boot when Mix is available but not started, the kind of edge case that breaks CI pipelines. On the Elixir side, two bug fixes landed: struct error messages now format consistently when you pass non-atom keys [2], and Task.yield_many/2 no longer hangs when the :limit parameter exceeds the actual task count [3]. A smaller EEx optimization also landed to speed up fn block detection by scanning tokens in reverse [4].

Action items

→ Upgrade to Phoenix 1.8.11 before next deploy if you use Mix-based apps phoenixframework/phoenix [immediate]
→ Test URI encoding paths with latest Elixir to validate 10x gains elixir-lang/elixir [plan]
→ Review Task.yield_many calls with :limit; ensure limit does not exceed task count elixir-lang/elixir [monitor]

References

[1] Optimize URI.encode_www_form/1 and RFC 3986 query encoding ↗ elixir-lang/elixir
[2] Fix struct key malformed error message ↗ elixir-lang/elixir
[3] Fix Task.yield_many/2 waits too long or forever when :limit exceeds task count (#15737) elixir-lang/elixir
[4] Optimize EEx fn block detection ↗ elixir-lang/elixir
[5] v1.8.11 ↗ phoenixframework/phoenix

Quick answers

What shipped in Elixir & Phoenix on August 13, 2026?: Elixir landed a massive optimization for URL encoding that hits 10x gains on empty strings, while Phoenix 1.8.11 fixes a critical startup failure. In total, 4 commits, 4 pull requests, and 1 releases landed.
Who contributed to Elixir & Phoenix on August 13, 2026?: 4 developers shipped this update, including NelsonVides, Alexander Gubarev, preciz, and github-actions[bot].
What were the notable Elixir & Phoenix updates?: Optimize URI.encode_www_form/1 and RFC 3986 query encoding, Fix struct key malformed error message, and Fix Task.yield_many/2 waits too long or forever when :limit exceeds task count (#15737).

ELIXIR FIXES DATE FORMATTING BUG, SPEEDS UP URI QUERIES

Date.to_iso8601/2 was silently dropping the format parameter for custom calendars, and it's fixed.

elixir 6 shipped

Elixir & Phoenix Aug 12

ELIXIR TIGHTENS GUARD SYNTAX, PHOENIX FIXES MIX DETECTION

José Valim shut down a common footgun in Elixir guards while the team fixed a startup bug that breaks when mix is available but not yet started.

elixir 6 shipped

Elixir & Phoenix Aug 11

PHOENIX LIVE VIEW PATCHES OPEN REDIRECT VULNERABILITY ACROSS TWO VERSIONS

Phoenix Live View shipped emergency security fixes for CVE-2026-64941 in both v1.1.33 and v1.2.9 to close an open redirect hole via ASCII control characters in the redirect/2 function.

elixir 14 shipped

Elixir & Phoenix Aug 10

ELIXIR FIXES UTF-8 CORRUPTION IN MACRO.TO_STRING, ECTO CUTS COMPILE DEPS

A critical fix landed for Elixir's string handling that was silently corrupting UTF-8 sequences when converting C1 control characters, while Ecto shipped a change that trims unnecessary compile-time dependencies from schema derivations.

elixir 4 shipped

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