![]() ![]() Based on that AST, the interpreter can start to do its thing and produce bytecode. ![]() The JavaScript engine parses the source code and turns it into an Abstract Syntax Tree (AST). It all starts with the JavaScript code you write. Note: If you prefer watching a presentation over reading articles, then enjoy the video below! If not, skip the video and read on. As a JavaScript developer, having a deeper understanding of how JavaScript engines work helps you reason about the performance characteristics of your code. This article describes some key fundamentals that are common to all JavaScript engines - and not just V8, the engine the authors ( Benedikt and Mathias) work on.
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