WebAssembly in Action

Chapter 2. A look inside WebAssembly modules

This chapter covers

• Descriptions of a WebAssembly module’s known and custom sections

In this chapter, you’ll learn about the different sections of a WebAssembly module and their purposes. I’ll offer more detail as you proceed through this book, but it’s helpful to have a basic understanding of how modules are structured and how the different sections work together.

Some benefits of a module’s different sections and how they’re designed are

• Efficiency—The binary bytecode can be parsed, validated, and compiled in a single pass.
• Streaming—Parsing, validation, and compilation can begin before all the data has been downloaded.
• Parallelization—It’s possible for the parsing, validation, and compilation ...