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A Node.js API stalls under load

A Node.js API has one endpoint that hashes passwords with a synchronous function taking 150 ms. Under load, every endpoint becomes slow, even simple health checks. Why?

A.Synchronous work blocks the single event loop for all requestsB.Node.js can only accept one TCP connection at a timeC.Health checks always slow down under any kind of loadD.The hashing endpoint is using too little memory to run

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A Node.js API stalls under load

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