Performance · interview question

A teammate submits shaky profiling first code. Which review comment is the strongest?

Multiple choiceEasychapter-16-curatedpremiumperformanceprofiling-first

Make the rule clearer and easier to explain. Measure where time is actually spent before you decide what deserves optimization effort.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.Solve the symptom with comments only and avoid changing the code shape around profiling first.

Answer and explanation

Correct answer

A. Make the rule clearer and easier to explain. Measure where time is actually spent before you decide what deserves optimization effort.

Why

The best review comment anchors the change to readability, correctness, and future maintenance. Optimizing the wrong function feels productive and still leaves the real bottleneck untouched.

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A teammate submits shaky profiling first code. Which review comment is the strongest?

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