Chapter 1: Understanding LLVM
JavaScript is one of the most popular programming languages. However, JavaScript has two main disadvantages:
- Unpredictable performance
JavaScript executes inside the environment and runtime provided by JavaScript engines. There are various JavaScript engines (V8, WebKit, and Gecko). All of them were built differently and run the same JavaScript code in a different way. Added to that, JavaScript is dynamically typed. This means JavaScript engines should guess the type while executing the JavaScript code. These factors lead to unpredictable performance in JavaScript execution. The optimizations for one type of JavaScript engine may cause undesirable side effects on other types of JavaScript engines. This leads ...
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