How dsweep Uses a Three-Stage Pipeline to Scan Duplicate Files Efficiently in .NET 10

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Developer dsweep is a duplicate-file scanner built on .NET 10 that avoids the high cost of hashing every file by using a three-stage detection funnel. The first stage eliminates files using only their size metadata, since files of different sizes can never be identical. Files sharing the same size then undergo a quick SHA-256 hash of just their first 64 KB, filtering out most remaining non-duplicates cheaply. Only files that pass both earlier checks proceed to a full SHA-256 hash, dramatically reducing unnecessary disk I/O. The design also incorporates a reversible quarantine system, and the author credits .NET's modern APIs for enabling clean, performant CLI tooling.

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Developer cuts Claude Design sync cost from 665k tokens to near zero with custom CLI

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ProgrammingDEV Community ·

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