You don't know JS: Async & Performance
Kyle Simpson
This book focuses on the new asynchronous features in JavaScript, which are new and confusing to developers.
Score based on developer article recommendations — not sales data or reviews.
🟢 Developer Verdict
A deep dive into JavaScript's asynchronous features and performance optimizations, clarifying common confusions and advanced patterns.
Read this if
- ✓ You need to untangle complex asynchronous JavaScript patterns.
- ✓ You want to master Promises, async/await, and event loop mechanics.
- ✓ You aim to optimize the performance of your JavaScript applications.
Skip this for now if
- ✗ You are a complete beginner to JavaScript programming.
- ✗ You prefer practical, project-based coding exercises.
- ✗ You need a broad overview of general JavaScript language features.
🔄 Compare & Reading Path
Alternatives
📊 Why Developers Recommend
It takes language understanding beyond the basics.
Cited by 12 different developers, each bringing their own experience and perspective.
Developers value this book for building durable technical understanding, going beyond surface-level patterns into the reasoning behind design decisions.
💬 What Developers Say
"Last but not least (in fact that's my favorite), it's a series of 6 books by Kyle Simpson, titled *You don't know JS*."
— kapantzak · Some of my favorite Javascript resources · Aug 7, 2019
"If you've never read Kyle Simpson's fantastic series, [You Don't know JS], I'd first encourage to stop reading this, go read _that_ , and then come back."
— paceaux · Kyle Simpson proved I STILL don't know JavaScript (arrays) · Dec 7, 2019
"All the above 3 books by Kyle Simpson are must read , word by word"
— deen_john · Resources to Master Javascript · Apr 16, 2018
Based on 8 developer article mentions
👤 Who Should Read This
Best for
- • Developers looking to grow their careers
Less ideal for
- • Readers looking only for quick interview patterns
- • Developers wanting immediate hands-on tutorials
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Kyle Simpson
Mentioned in 14 articles · #53 overall
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Recommended in 14 Articles
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