Project Tooling · interview question

What is the healthiest performance judgment around module boundaries?

Multiple choiceMediumchapter-6-curatedpremiumproject-toolingmodule-boundaries

python

from order_ops.pricing import compute_total
from order_ops.validation import ensure_valid_order

Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep module boundaries 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 module boundaries.

Answer and explanation

Correct answer

A. Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.

Why

Premature optimization is usually weaker than targeted optimization backed by measurement.

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What is the healthiest performance judgment around module boundaries?

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