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Progress18 of 45
JavaScriptLow-Medium
Cache Storage API Calls
`localStorage`, `sessionStorage`, and `document.cookie` are synchronous and expensive. Cache reads in memory.
javascriptlocalStoragestoragecachingperformance
Code Comparison
•Incorrect (reads storage on every call):typescript
•Correct (Map cache):typescript
•Cookie caching:typescript
Why This Matters
Impact: reduces expensive I/O. This optimization is classified as LOW-MEDIUM priority for production applications.