Apply bitwise tricks for performance

Q: Apply bitwise tricks for performance

This is a Coding & Algorithms interview question from Anthropic for Software Engineer roles. View the full question and solution on PracHub.

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Question

For an integer-heavy inner loop, propose bit-level optimizations that reduce branches and memory traffic: e.g., population count usage, fast modulo by power-of-two with masks, branchless conditional updates via bitwise selects, and alignment checks. Provide concise code examples, explain correctness, and analyze the microarchitectural impact (pipeline stalls, ILP, cache behavior).

Apply bitwise tricks for performance

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