September 2018
Intermediate to advanced
328 pages
9h 10m
English
Content preview from Learn WebAssembly
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Definition and module overview
The binary format is defined as a dense linear encoding of the abstract syntax. Without getting too technical, that essentially means it's an efficient form of binary that allows for fast decoding, small file size, and reduced memory usage. The file representation of the binary format is a .wasm file, which will be the compilation output from Emscripten that we'll use for our examples.
The Values, Types, and Instructions subsections of the Core Specification for the binary format correlate directly to the Text Format section. Each of these concepts is covered in the context of encoding. For example, according to the specification, the Integer types are encoded using the LEB128 variable-length integer encoding, ...
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