ITPUB
Dec 27, 2025 · Fundamentals
How to Test Membership in 4 Billion Numbers Using Only 1 GB Memory
This article explains how to determine whether a given unsigned integer belongs to a set of 4 billion distinct numbers within a 1 GB memory limit, comparing a bitmap approach with a Bloom filter, providing detailed implementation steps and C++ code examples for both methods.
BitmapC++bloom filter
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