perf(one-page): sort a FIELD input's values once per focus

[chhoumann]

The one-page form's {{FIELD}} input now sorts and filters the field's values once each time it gets focus, instead of on every keystroke. For a field with 26,668 values a keystroke blocks for about 30 ms instead of about 70 ms.

Why

FieldValueInputSuggest.getSuggestions called collectFieldValuesProcessed on every keystroke. The raw values come from FieldSuggestionCache, but FieldValueProcessor.processValues then filtered, de-duplicated and locale-sorted all of them again each time. Since #2113 the cache returns every value, so a large field paid the whole sort per key.

Change

The input keeps the processed values (a promise, so keystrokes during the first load share it) and drops them on blur. The next focus reads them again, through the shared cache.

A vault change made while the input has focus now shows the next time it gets focus, not on the next keystroke. Opening the form, or leaving the field and coming back, still sees it (#1656).

Measured

Obsidian 1.13.7, isolated vault with 20,151 notes. One-page form, typing in each FIELD input; longest main-thread block per keystroke, two runs each:

Field	master 06e902a	This branch
{{FIELD:aliases}}, 26,668 values, ada alias 19	median 74 / 67 ms, max 92 ms	median 36 / 29 ms, max 44 ms
{{FIELD:owner}}, 400 values, ada lov	median 18 ms	median 18 ms

Both list the same 200 matches. What is left per keystroke is the fuzzy ranking. The sort now runs once when the field gets focus.

Checked in the same form: with the aliases input focused, I created a note with alias Zebra quokka 777 and typed zebra quokka. On this branch it isn't listed until the input loses and regains focus; then it is. On master it is listed right away.

Tests

• FieldValueInputSuggest.test.ts: three queries while focused read the values once; after blur and focus they are read again and the new value is there. The highlight-race test now overtakes an old lookup across a refocus, the only place two loads can still race.
• pnpm run build-with-lint, pnpm run test (6601 passed), .agents/run-e2e (395 passed, 24 Templater-only skipped).

Release / migration

None. Ships with 2.30.0's #2113, which made the full value list reach this input.

Fixes #2116

Note

Cache sorted field values once per focus in FieldValueInputSuggest

FieldValueInputSuggest.getSuggestions now lazily creates one promise that collects and sorts field values, and reuses it across all keystrokes while the input stays focused. A blur listener clears the cache so the next visit recollects values, and destroy removes that listener. The existing sequence guard still prevents older async lookups from overwriting newer results.

• Updated tests in FieldValueInputSuggest.test.ts to verify the focus-scoped cache and stale-lookup behavior.
• Behavioral Change: field values added elsewhere during a focused session are not picked up until the input is blurred and refocused.

^{Macroscope summarized f02354a.}

Summary by CodeRabbit

• Bug Fixes
  • Field-value suggestions reuse the collected values for the duration of an input visit, keeping repeated lookups consistent while the input remains focused.
  • When the input loses focus and is focused again, suggestions use a fresh collection of field values for the new visit.

[chatgpt-codex-connector]

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-01T12:09:47.890824Z	7e1299c	Draft marked ready

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• src/gui/suggesters/FieldValueInputSuggest.ts

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📝 Walkthrough

Walkthrough

FieldValueInputSuggest reuses processed field values during a focus session. Blur clears the cached promise, and a later focus session collects values again. Tests cover repeated lookups, blur and refocus, and overlapping queries.

Changes

Field Value Suggestion Cache

Layer / File(s)	Summary
Cache processed values per focus session src/gui/suggesters/FieldValueInputSuggest.ts, src/gui/suggesters/FieldValueInputSuggest.test.ts	getSuggestions reuses a promise for processed field values. A blur listener clears the promise, and destroy() removes that listener before calling super.destroy(). Tests cover reuse while focused, collection after refocus, and an overlapping query after blur and refocus.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: 🔵 Low · up to f0235

A metadata-cache exception during filtered field suggestions could leave suggestions unavailable until the input is blurred and refocused. The issue is localized and recoverable, so the PR is mergeable with bounded owner awareness.

Security Architecture Review

Security architecture risk: ⚪ Minimal · up to f0235

The change is confined to suggestions for one input. It delays updates until refocus but does not add data access, privileges or a new execution path. No material security regression was identified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The inspected change affects one input's suggestion snapshot and recovery period. It does not introduce another collector, caller or selection sink, so the changed exposure is temporal reuse of already collected values rather than expanded access.

Trust Boundaries and Controls

• observed — Field specifiers still determine the collection filters, and vault-derived values still pass through the existing file filtering and value processing before ranking and input completion. The new cache does not replace those collection controls.

🚥 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 concisely describes the main change: processing a FIELD input's values once per focus for performance.
Linked Issues check	✅ Passed	Issue #2116 requires one-page {{FIELD}} values to be filtered, deduplicated, and locale-sorted once per focus, with fuzzy lookup still running per keystroke. FieldValueInputSuggest now stores the …
Out of Scope Changes check	✅ Passed	The changes are limited to FieldValueInputSuggest and its tests. The promise cache, blur cleanup, and destroy() listener removal directly support the focus-scoped processing objective. The test up…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 2…

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_{A rabbit taps a field and waits,
One sorted promise guards the gates.
While focus stays, the values stay,
A blur clears them on the way.
Refocused, fresh values appear.
The rabbit nibbles, pleased and clear.}

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Reviewed commit: 7e1299ca48

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Inline comments:
Review comments at @src/gui/suggesters/FieldValueInputSuggest.ts:
- Around line 40-45: In the lookup method that awaits `this.values`, clear the
cached promise if that specific promise rejects, then rethrow the error.
Preserve reuse of successful and in-flight promises by clearing only when
`this.values` still references the rejected promise.

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• src/gui/suggesters/FieldValueInputSuggest.test.ts
• src/gui/suggesters/FieldValueInputSuggest.ts

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