April 14, 2025

You Don't Know JS: Async & Performance

26 minutes

This Book is from Kyle Simpson's "You Don't Know JS: Async & Performance," exploring JavaScript's asynchronous nature. It contrasts the limitations of callbacks, highlighting their impact on code readability and maintainability, particularly in handling concurrency and potential trust issues with external libraries. The book then introduces Promises as a superior solution, emphasizing their composability and trust-building mechanisms for managing asynchronous operations. Further, it examines generators and their role in creating more sequential-looking asynchronous code, along with their integration with Promises. Finally, the text discusses Web Workers for task parallelism and micro-level performance optimization strategies, including benchmarking techniques and the importance of context in performance analysis.

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