System Design · Reddit · Medium
Comment Thread Ranking System Problem Framing A single popular Reddit discussion can grow to thousands of comments nested several levels deep. Because any reader will see only a small fraction of them, the order in which they appear matters a great deal. The goal is to place the most useful top-level comments near the top and, when a branch is expanded, show the most useful replies first. Keeping the tree readable and engaging depends on pushing high-value comments up and…
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