Who contributed to Elixir & Phoenix on September 4, 2026?

4 developers shipped this update, including Barna Kovacs, lukaszsamson, Alexander Gubarev, and José Valim.

What were the notable Elixir & Phoenix updates?

Inline Calendar.ISO parsing heads and eliminate guarded helpers (#15840), Optimize Date.Range.member?/2 by branching on step sign (#15838), and Fix unsound refinement of `min/2` and `max/2` arguments.

♥

Sep 4, 2026

$ the-wire · showcase

Elixir date parsing loses guarded helpers

By RepoJournal · Filed 07:02 UTC on September 4, 2026 · About Elixir & Phoenix

4 people shipped this

Barna Kovacs @preciz 3 cited

lukaszsamson @lukaszsamson 1 cited

José Valim @josevalim 1 cited

Alexander Gubarev @AlexGx

Elixir's standard library trims date parsing overhead and LiveView cleans up dead code, while Ecto shifts to codepoint counting.

Elixir inlined the `"-"` and `"+"` prefix matching directly into the public heads of `parse_date/2`, `parse_naive_datetime/2`, and `parse_utc_datetime/2`, removing the intermediate dispatch through `parse_date_guarded/2`, `parse_naive_datetime_guarded/2`, and `parse_utc_datetime_guarded/2` on every call. This removes 9 lines and speeds up all date and datetime parsing [1]. [2]

Action items

→ Benchmark date parsing in hot paths to confirm expected gains elixir-lang/elixir [monitor]
→ Review any LiveView custom DOM patching for reliance on removed helpers phoenixframework/phoenix_live_view [monitor]
→ Test string length validations affected by Ecto codepoint counting elixir-ecto/ecto [plan]

References

[1] Inline Calendar.ISO parsing heads and eliminate guarded helpers (#15840) ↗ elixir-lang/elixir
[2] Optimize Date.Range.member?/2 by branching on step sign (#15838) ↗ elixir-lang/elixir
[3] Fix unsound refinement of `min/2` and `max/2` arguments ↗ elixir-lang/elixir
[4] Remove unused extra parameter from to_component_tracking (#4417) ↗ phoenixframework/phoenix_live_view
[5] Count codepoints by default ↗ elixir-ecto/ecto

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

the week in review Phoenix drops Ecto from phx.new.web default the month in review Elixir core tuning, Ecto breaking change, LiveView patches dominate August

Topics: Elixir & Phoenix Full archive →

Quick answers

What shipped in Elixir & Phoenix on September 4, 2026?: Elixir's standard library trims date parsing overhead and LiveView cleans up dead code, while Ecto shifts to codepoint counting. In total, 23 commits and 18 pull requests landed.
Who contributed to Elixir & Phoenix on September 4, 2026?: 4 developers shipped this update, including Barna Kovacs, lukaszsamson, Alexander Gubarev, and José Valim.
What were the notable Elixir & Phoenix updates?: Inline Calendar.ISO parsing heads and eliminate guarded helpers (#15840), Optimize Date.Range.member?/2 by branching on step sign (#15838), and Fix unsound refinement of `min/2` and `max/2` arguments.

♥

$ log Elixir & Phoenix --recent

2026-09-07 LiveView flash age 1000x too long, plus IEx autocomplete crash fix 15 shipped 2026-09-06 Elixir fixes unary operator precedence with do-end blocks 15 shipped 2026-09-05 Phoenix CI drops Process.sleep blind waits; Elixir fixes Hex version check 13 shipped 2026-09-03 Elixir reworks test manifest for parameterized failures 15 shipped

$ log --all # elsewhere on the wire

Meta 2026-09-07 React Native adds Stable API guards to renderer attributed string FastAPI & Pydantic 2026-09-07 Pydantic fixes Mypy plugin crash, tightens datetime constraints

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