The document discusses various techniques for writing efficient JavaScript code, including: 1. Avoid premature optimization and focus on clean, correct code first. Optimization can then focus on specific bottlenecks. 2. Use language shortcuts like object and array literals instead of constructors to improve performance. 3. Cache frequently accessed values like DOM elements, styles, and function pointers to avoid repeated lookups. 4. Minimize DOM access and manipulation by batching changes and reducing the number of elements. 5. Use event delegation with event bubbling instead of attaching the same handler to many elements.

1. Writing Efficient JavaScript Code Prem Nawaz Khan