A pretty technical blog post over at Garantia Data’s blog relates the results of a recent benchmark test of the effects of cloud intrastructure on Memcached and Redis datasets:

Redis and Memcached were designed from the ground-up to achieve the highest throughput and the lowest latency for applications, and they are in fact the fastest data store systems available today. They serve data from RAM,  and execute all the simple operations (such as SET and GET) with O(1) complexity.

However, when run over cloud infrastructure such as AWS, Redis or Memcached may experience significant performance variations across different instances and platforms, which can dramatically affect the performance of your application.

Read the full post.