Performance · interview question

Which move is the best default when profiling first becomes part of this workflow?

Multiple choiceEasychapter-16-curatedpremiumperformanceprofiling-first

Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep profiling first implicit so the script stays short and hope the next engineer infers the rule.Measure where time is actually spent before you decide what deserves optimization effort.Solve the symptom with comments only and avoid changing the code shape around profiling first.

Answer and explanation

Correct answer

C. Measure where time is actually spent before you decide what deserves optimization effort.

Why

Measure where time is actually spent before you decide what deserves optimization effort. That is the stronger engineering move because interviewers trust performance answers more when they begin with measurement rather than confidence. Optimizing the wrong function feels productive and still leaves the real bottleneck untouched.

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Which move is the best default when profiling first becomes part of this workflow?

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