From humble beginnings at an MSP, I've adventured through life as a sysadmin, into an engineer, and finally landed as a developer focused on fixing problems with automation.
You're confusing a lot of concepts here. Concurrency (async) has nothing to do with threading vs multiprocessing or whatever model you use. It's about "parallel" execution. JavaScript is synchronous by default. JavaScript is just a language, it is neither fast or slow. That is up to its engines.
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You're confusing a lot of concepts here. Concurrency (async) has nothing to do with threading vs multiprocessing or whatever model you use. It's about "parallel" execution. JavaScript is synchronous by default. JavaScript is just a language, it is neither fast or slow. That is up to its engines.