How can heavy synchronous work break the event loop?

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CodeZetta · Accepted Answer

Long CPU loops block the single JS thread, delaying timers, I/O, and health checks — appearing as latency spikes. Offload to worker_threads, child processes, or external services. Profile with clinic/0x or CPU profiles. Keep handlers short; batch and yield with setImmediate for cooperative multitasking when needed.

How can heavy synchronous work break the event loop?

Short Interview Answer

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Short Interview Answer

Detailed Explanation

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