docs(changelog): appstate index-MAC dedup 10× perf win (whatsapp-rust#868)

[jlucaso1]

$(cat <<'EOF'

Summary

• Adds changelog/2026-06-14-appstate-dedup-sort.mdx documenting the adaptive two-path dedup in collect_unique_index_macs merged in oxidezap/whatsapp-rust#868
• Registers the new entry at the top of the June 14 section in docs.json

What the source PR changed

collect_unique_index_macs (wacore/src/appstate_sync.rs) deduplicates index MACs before the batched backend lookup. The O(n²) linear scan is now kept only for ≤ 64 mutations; above that an O(n log n) index sort runs instead, cutting resume-sync time at N=1000 from 5,678 µs → 550.8 µs (×10) with no memory regression and only ~4 KB of extra scratch per patch.

No public API, wire, or user-facing behaviour changes — changelog entry only.

Test plan

• Verify the new .mdx renders correctly in the Mintlify preview
• Confirm the entry appears at the top of the June 14 changelog section

https://claude.ai/code/session_01NPRJdjNk2v7E3izPccavpF
EOF
)

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Generated by Claude Code

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Summary by cubic

Add a June 14 changelog entry documenting the adaptive index-MAC dedup in collect_unique_index_macs, and register it in docs.json.
Highlights a 10× speedup at N=1000 (5.7 ms → 550 µs) by switching to a sort path above 64 mutations, with no API or behavior changes.

^{Written for commit aa9f92a. Summary will update on new commits.}

Summary by CodeRabbit

• Documentation
  • Added new changelog entry documenting recent improvements to app state synchronization.
  • Updated documentation navigation to reflect new changelog entry.

[mintlify]

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Project	Status	Preview	Updated (UTC)
whatsapp-rust	🟢 Ready	View Preview	Jun 14, 2026, 11:12 PM

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: c20846de-9b04-4db5-bdbb-25a9b3f022e0

📥 Commits

Reviewing files that changed from the base of the PR and between a35417b and aa9f92a.

📒 Files selected for processing (2)

• changelog/2026-06-14-appstate-dedup-sort.mdx
• docs.json

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📝 Walkthrough

Walkthrough

A new changelog entry dated June 14, 2026 is added as an MDX file documenting an adaptive dedup optimization for collect_unique_index_macs in app state sync, including benchmark results and test coverage notes. The entry is registered in the Mintlify docs navigation via docs.json.

Changes

Changelog Entry: appstate dedup sort

Layer / File(s)	Summary
Changelog page and docs navigation changelog/2026-06-14-appstate-dedup-sort.mdx, docs.json	New MDX changelog page describes the adaptive two-path dedup strategy for collect_unique_index_macs (linear scan for ≤64 mutations, index-sort/dedup/reorder pipeline for larger patches), reports ~10× speedup at N=1000, documents dedup_tests coverage, and notes no public API or wire changes. The page is added to the English Changelog navigation in docs.json.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

A rabbit sorts MACs with a hop and a bound,
O(n log n) — the fast path is found!
For patches of sixty-four, linear will do,
But bigger ones sort, dedup, reorder anew.
Ten times the speed, and the tests all agree—
No API changes, just pure efficiency! 🐇✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically summarizes the main change: adding a changelog entry for a ~10× performance improvement to the appstate index-MAC deduplication function.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude/eager-cerf-k4rt9s

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[cubic-dev-ai]

No issues found across 2 files

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