A crash course in just-in-time (JIT) compilers - Mozilla Hacks - the Web developer blog

This is the second part in a series on WebAssembly and what makes it fast. If you haven’t read the others, we recommend starting from the beginning. JavaScript started out ...

This is the second part in a series on WebAssembly and what makes it fast. If you haven’t read the others, we recommend starting from the beginning . JavaScript started out slow, but then got faster thanks to something called the JIT. But how does the JIT work? How JavaScript is run in the browser When you as a developer add JavaScript to the page, you have a goal and a problem. Goal: you want to tell the computer what to do. Problem: you and the computer speak different languages. You speak a human language, and the computer speaks a machine language. Even if you don’t think about JavaS

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