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jQuery 4.0 Performance

The article discusses the performance improvements in jQuery 4.0, highlighting benchmarks showing it to be up to twice as fast as jQuery 3.7 for common operations like DOM manipulation and event handling, while maintaining backward compatibility.

Background

- jQuery is a once-dominant JavaScript library that simplified tasks like DOM manipulation, event handling, and animations. It was a near-universal dependency on the early web (mid-2000s through 2010s) because raw browser APIs were inconsistent across browsers (notably Internet Explorer). The library is now past its prime; modern browsers have standardized APIs (e.g., `querySelector`, `fetch`) that make many jQuery features redundant, and native JavaScript has become far more capable and faster. However, millions of legacy sites and internal apps still rely on it.

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