Bit Manipulation

Processing Billions of Integers: A Lesson in Memory Efficiency and Bit Manipulation The Challenge In storage systems, we often deal with raw binary dumps of metadata tables. When debugging consistency issues, you may need to scan billions of 32-bit identifiers to find duplicates or unique entries. Because these files can be massive, loading them into a standard hash map is impossible. The task seems simple on the surface: given a binary file containing 1 billion 32-bit integers, count how many are unique and how many appear exactly once. ...