2 approaches for tracking online users with Redis. Which one is faster?

Question

I recently found a good blog post introducing 2 approaches for tracking online website users using Redis.

1) Smart keys and setting their validity period http://techno-weenie.net/2010/2/3/where-s-waldo-track-user-locations-with-node-js-and-redis

2) Set-s and crosses http://www.lukemelia.com/blog/archives/2010/01/17/redis-in-practice-whos-online/

Can you judge which one should be faster and why?

Answer 1

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