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The CPU in your browser: WebAssembly demystified

Description

In the recent years we saw an explosion of usage of Python in the browser: Pyodide, CPython on WASM, PyScript, etc. All of this is possible thanks to the powerful functionalities of the underlying platform, WebAssembly.

In this talk we will examine what is exactly WebAssembly, what are the strong and weak points, what are the limitations and what the future will bring us. We will also see why and how WebAssembly is useful and used outside the browser.

This talk is targeted to an intermediate/advanced audience: no prior knowledge of WebAssembly is required, but it is required to have a basic understanding of what is a compiler, an interpreter and the concept of bytecode.

The introduction will cover the basics to make sure that the talk is understandable also by people who are completely new to the WebAssembly world, but after that we will dive into the low-level technical details, with a special focus on those who are relevant to the Python world, such WASI vs emscripten, dynamic linking, JIT compilation, interoperability with other languages, etc.

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