"Finding something quickly and finding the best thing quickly are two completely different engineering problems. " So far in this series, we've explored one of the most common behaviours in software systems: Fast lookup. Whenever a system already knows what it's looking for—a User ID, Product ID...

Source: [Dev.to](https://dev.to/saras_growth_space/lld-data-structures-in-design-context-why-some-problems-need-the-best-result-instead-of-any-4afd)

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