Daniel Clifford gave a great talk "Breaking the JavaScript Speed Limit
with V8" at Google I/O 2012. In the speech, he explained in depth 13 simple code optimization methods that can make your code compile/run your JavaScript code faster in Chrome's V8 JavaScript engine. In his speech, he explained how to optimize and why. The key points of optimization are briefly listed below:
1. Initialize all objects in the constructor
2. Always initialize objects in the same order
3. Try to Use numbers
4. Use consecutive primary keys starting from 0 for the array
5. Do not allocate large arrays (>64K) in advance, you should expand the array as you use it
6. Do not delete elements in the array
7. Do not load uninitialized or deleted elements
8. For fixed-size arrays, use "array literals" to initialize
9. Allocate the correct space size to small arrays before use
10. Do not store non-numeric content in numeric arrays
11. Try to use a single type (monomorphic) Instead of polymorphic
12. Do not use try{} catch{}
13. Avoid modifying hidden classes in methods after optimization
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
