vue-doctor/performance/js-index-maps

Build a Map indexed by the search key before the loop for O(1) lookups

Property	Value
Category	Performance
Default Severity	warning
Confidence	medium
Fixable	No
Engine	oxlint
Since	v1.0.0
Frameworks	vue, nuxt
Test files	Not checked (which files)

Why it matters

Build a Map indexed by the search key before the loop for O(1) lookups

How to fix

Review the finding and update the code according to best practices below.

Agent Guidance

Reported when a loop searches the same array on every iteration with a key-equality predicate (find(x => x.id === id)). Build a Map keyed by that field once before the loop and use map.get(key) instead. Searches whose array changes per iteration, or whose predicate is not a key comparison, are left alone.

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Rule source: vue-doctor/performance/js-index-maps