Performance · interview question

Which option describes the most likely pitfall around profiling first?

Multiple choiceEasychapter-16-curatedpremiumperformanceprofiling-first

Keep profiling first implicit so the script stays short and hope the next engineer infers the rule.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Solve the symptom with comments only and avoid changing the code shape around profiling first.Optimizing the wrong function feels productive and still leaves the real bottleneck untouched.

Answer and explanation

Correct answer

D. Optimizing the wrong function feels productive and still leaves the real bottleneck untouched.

Why

Optimizing the wrong function feels productive and still leaves the real bottleneck untouched. Calling out that risk matters because interviewers trust performance answers more when they begin with measurement rather than confidence.

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Which option describes the most likely pitfall around profiling first?

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