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An overview of web workers  |  web.dev

https://web.dev/learn/performance/web-worker-overview

“Much of what the user sees in the browser occurs on a single thread known as the main thread. However, there are opportunities where you can start up new threads to do computationally expensive work so that the main thread can accommodate important user-facing tasks. The API that does this is known as the Web...” (the page’s own description)

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