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---
name: js-cache-property-access
description: Cache Property Access in Loops. Use when you need help with js cache property access.
license: CC-BY-NC-SA-4.0
metadata:
risk: unknown
source: community
kind: mode
category: rules
---
## Cache Property Access in Loops
Cache object property lookups in hot paths.
**Incorrect (3 lookups × N iterations):**
```typescript
for (let i = 0; i < arr.length; i++) {
process(obj.config.settings.value);
}
```
**Correct (1 lookup total):**
```typescript
const value = obj.config.settings.value;
const len = arr.length;
for (let i = 0; i < len; i++) {
process(value);
}
```
