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⚡ Bolt: O(1) index maps for SwiftUI @Published toggles#229

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bolt-index-maps-optimization-13885162832263264934
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⚡ Bolt: O(1) index maps for SwiftUI @Published toggles#229
acebytes wants to merge 1 commit into
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bolt-index-maps-optimization-13885162832263264934

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@acebytes
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@acebytes acebytes commented May 8, 2026

💡 What:
Replaced O(n) firstIndex(where:) array searches with O(1) dictionary-based index maps for UI toggles of scan results and Node modules.

🎯 Why:
When users click to select or deselect a large number of cached items, relying on a linear array scan to find the item's UUID index can cause UI hiccups, especially on larger filesystems.

📊 Impact:
Provides O(1) instantaneous item selection toggling regardless of total scan result size, guaranteeing the UI thread remains unblocked when iterating large selections.

🔬 Measurement:

  1. Build and run Cacheout.
  2. Run a full disk scan resulting in hundreds/thousands of node_modules and cache items.
  3. Rapidly click multiple items to toggle their selection state; notice no main-thread stuttering.

PR created automatically by Jules for task 13885162832263264934 started by @acebytes

Replaces O(n) `firstIndex(where:)` lookups with O(1) dictionary-based index maps for toggling item selection in the UI.

- Adds `scanResultsIndexMap` and `nodeModulesIndexMap` variables.
- Populates index maps safely using `enumerated().reduce(into: [:])`.
- Updates `toggleSelection` and `toggleNodeModulesSelection` to use maps.
- Maintains backwards-compatible fallback mechanisms if map gets out-of-sync.

Co-authored-by: acebytes <2820910+acebytes@users.noreply.github.com>
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