Compiled languages: C/C++, GO
Interpreted languages: Python, Javascript
AST: Abstract syntax tree (data structure)
- Babel code converter: ES6 -> ES6 AST -> ES5 AST -> JS source code
- ESLint: source code -> AST -> check code normalization
Just-in-time compilation (JIT) : bytecode with interpreter and compiler
- js v8
- Java and Python VMS
Optimize JS execution efficiency
- Improved single execution speed
- Avoid large inline scripts (parsing HTML takes up the main thread)
- Reduce js file size (faster download, lower memory footprint)