Why it matters

Right algorithm choice trumps clever code. Understand inputs first.

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The architecture

Analyze input size + constraints.

Prefer library.

Benchmark alternatives.

Choosing algorithmsAnalyze inputsize + constraintsLibrary firstbefore customBenchmarkon real dataLibrary implementations are tuned; measure before optimizing
Choosing algorithms.
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How it works end to end

Library first.

Benchmark alternatives.

Profile before optimize.