Node.js · Senior · Question 9 of 75

How do you find which functions use the most CPU in production-like conditions?

1Read process.cpuUsage() once at startup
✓Correct answer: Record a CPU profile (--cpu-prof or the inspector) under realistic load and look at a flame graph
3Add console.time to every function

Explanation

Profiles show where time goes, including GC and native code. Generate load with a tool like autocannon or k6, since idle profiles show nothing useful.

How do you find which functions use the most CPU in production-like conditions?

Explanation

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