Java Architect Essentials
Feb 27, 2022 · Backend Development
Designing Efficient Read/Unread Tracking for Group Chat Messages Using Bitmaps
The article analyzes the memory overhead of naïvely storing per‑user read/unread lists for group chat messages and proposes a bitmap‑based scheme with user‑to‑map ID mapping, quit flags, and compact storage that can reduce per‑message space by over 95 percent.
Group Chatbackendbitmap
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