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LAB REPOSITORYPRO CODEBASE

TTL Cache Reaper

An in-memory TTL cache that stores absolute expiry timestamps, enforces lazy expiration on reads, and reclaims memory with active sweeps.

JavaScriptDifficulty: starter
$node implementations/ttl-cache-reaper/src/demo.js
Key Takeaways & Architecture Lessons
  • 01.TTL should be stored as an absolute expiry timestamp.
  • 02.Reads must reject expired data even if a background reaper has not run.
  • 03.Jitter spreads expirations so large batches do not stampede at one deadline.

Protected Implementation File

Full source code for README.md is included in the Pro engineering package.

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