Files
livedash-node/.opencode/skills/vercel-react-best-practices/rules/js-cache-property-access.md
Kaj Kowalski cd05fc8648 fix: resolve Prettier markdown code block parsing errors
- Fix syntax errors in skills markdown files (.github/skills, .opencode/skills)
- Change typescript to tsx for code blocks with JSX
- Replace ellipsis (...) in array examples with valid syntax
- Separate CSS from TypeScript into distinct code blocks
- Convert JavaScript object examples to valid JSON in docs
- Fix enum definitions with proper comma separation
2026-01-20 21:09:29 +01:00

29 lines
536 B
Markdown
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
---
title: Cache Property Access in Loops
impact: LOW-MEDIUM
impactDescription: reduces lookups
tags: javascript, loops, optimization, caching
---
## 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);
}
```