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Practical WebAssembly

You're reading from   Practical WebAssembly Explore the fundamentals of WebAssembly programming using Rust

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Product type Paperback
Published in May 2022
Publisher Packt
ISBN-13 9781838828004
Length 232 pages
Edition 1st Edition
Languages
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Author (1):
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Sendil Kumar Nellaiyapen Sendil Kumar Nellaiyapen
Author Profile Icon Sendil Kumar Nellaiyapen
Sendil Kumar Nellaiyapen
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Toc

Table of Contents (15) Chapters Close

Preface 1. Section 1: Introduction to WebAssembly
2. Chapter 1: Understanding LLVM FREE CHAPTER 3. Chapter 2: Understanding Emscripten 4. Chapter 3: Exploring WebAssembly Modules 5. Section 2: WebAssembly Tools
6. Chapter 4: Understanding WebAssembly Binary Toolkit 7. Chapter 5: Understanding Sections in WebAssembly Modules 8. Chapter 6: Installing and Using Binaryen 9. Section 3: Rust and WebAssembly
10. Chapter 7: Integrating Rust with WebAssembly 11. Chapter 8: Bundling WebAssembly Using wasm-pack 12. Chapter 9: Crossing the Boundary between Rust and WebAssembly 13. Chapter 10: Optimizing Rust and WebAssembly 14. Other Books You May Enjoy

Memory

Transferring data between JavaScript and WebAssembly is an expensive operation. In order to reduce the transfer of data between JavaScript and WebAssembly modules, WebAssembly uses sharedArrayBuffer. With sharedArrayBuffer both the JavaScript and WebAssembly modules can access the same memory and use it to share the data from one to the other.

The memory section of a WebAssembly module is a vector of linear memories. The linear memory model is a memory addressing technique in which the memory is organized in a single contiguous address space. It is also known as a flat memory model. The linear memory model makes it easier to understand, program, and represent the memory. But the linear memory model comes with a huge disadvantage of high execution time for rearranging elements in the memory and the wastage of memory space. Here, the memory represents a vector of raw bytes of uninterpreted data. They use resizable array buffers to hold the raw bytes of memory. We use sharedArrayBuffers...

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