A performance change should improve the measured workload without sacrificing correctness or wasting capacity. Which measurements and bottlenecks should be considered first?

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Tasadduq BurneyownerOwner · Founder

26525 reputation · 21 Nov 2024, 12:44 UTC

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Measure event-loop delay, CPU, heap usage and dependency latency. Profile before changing concurrency or increasing heap limits. Large synchronous JSON processing or regular expressions can block requests even when the service appears to spend most of its time on network I/O.

How can I improve Node.js performance without guessing?

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