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Eloquent JavaScript, 4th Edition
book

Eloquent JavaScript, 4th Edition

by Marijn Haverbeke
November 2024
Beginner to intermediate
456 pages
11h 5m
English
No Starch Press
Content preview from Eloquent JavaScript, 4th Edition

11

ASYNCHRONOUS PROGRAMMING

The central part of a computer, the part that carries out the individual steps that make up our programs, is called the processor. The programs we have seen so far will keep the processor busy until they have finished their work. The speed at which something like a loop that manipulates numbers can be executed depends pretty much entirely on the speed of the computer’s processor and memory.

But many programs interact with things outside of the processor. For example, they may communicate over a computer network or request data from the hard disk—which is a lot slower than getting it from memory.

When such a thing is happening, it would be a shame to let the processor sit idle—there might be some other work it could ...

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Publisher Resources

ISBN: 9781098182502Errata Page