Programming Interview Program to Design Feed (Timeline) #19 with Explanation

Design Feed (Timeline) #19

Hard Programming Interview System Design 17 views

Explanation Complexity

Problem Statement

Home feed like Twitter: rank posts and serve fast.

Example Solution (Public)

Programming Interview

Choose pull vs push model. For large scale, precompute timelines for active users (fan-out on write) and store in a sorted set. Cache pages, use ranking service, and backfill with pull for long-tail users.

Official Solution Code

Choose pull vs push model. For large scale, precompute timelines for active users (fan-out on write) and store in a sorted set. Cache pages, use ranking service, and backfill with pull for long-tail users.

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