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Don't Block the Event Loop (Or the Worker Pool) in JavaScript
Node.js uses the Event-Driven Architecture: it has an Event Loop for orchestration and a Worker Pool for expensive tasks. - rowsana/Not-blocking-event-loop
Whether or not your regular expression pattern is vulnerable (i.e. the regexp engine might take exponential time on it) is actually a difficult question to answer, and varies depending on whether you're using Perl, Python, Ruby, Java, JavaScript, etc., but here are some rules of thumb that apply across all of these languages: If your computation is more complex, offloading is a better approach: the communication costs, i.e. the overhead of passing serialized objects between the Event Loop and the Worker Pool, are offset by the benefit of using multiple cores. The Event Loop is responsible for JavaScript callbacks and non-blocking I/O, and a Worker executes tasks corresponding to C++ code that completes an asynchronous request, including blocking I/O and CPU-intensive work.
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