๐๐๐ซ๐๐จ๐ซ๐ฆ๐๐ง๐๐ ๐ญ๐๐ฌ๐ญ๐ข๐ง๐ in JavaScript is vital to ensure fast, efficient web applications. Key metrics include load time, time to interactive (TTI), JavaScript execution time, and memory usage. Tools like ๐๐ก๐ซ๐จ๐ฆ๐ ๐๐๐ฏ๐๐จ๐จ๐ฅ๐ฌ help analyze performance by profiling and identifying bottlenecks, while ๐๐ข๐ ๐ก๐ญ๐ก๐จ๐ฎ๐ฌ๐ automates audits for performance metrics like FCP and TTI. Libraries like ๐๐๐ง๐๐ก๐ฆ๐๐ซ๐ค.๐ฃ๐ฌ allow micro-benchmarking specific functions. Common issues include excessive DOM manipulation, large bundles, and memory leaks. Optimization techniques like ๐๐จ๐๐ ๐ฌ๐ฉ๐ฅ๐ข๐ญ๐ญ๐ข๐ง๐ , ๐ฅ๐๐ณ๐ฒ ๐ฅ๐จ๐๐๐ข๐ง๐ , ๐ฆ๐ข๐ง๐ข๐๐ข๐๐๐ญ๐ข๐จ๐ง, and using ๐๐๐๐ฌ enhance performance, ensuring smooth user experiences and improved SEO.
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