The Redis experts at Garantia Data did some benchmarking in the wake of Amazon’s announcement of

Their conclusion:

After 32 intensive tests with Redis on AWS (each run in 3 iterations for a total of 96 test iterations), we found that neither the non-optimized EBS instances nor the optimized-EBS instances worked better with Amazon’s PIOPS EBS for Redis. According to our results, using the right standard EBS configuration can provide equal if not better performance than PIOPS EBS, and should actually save you money.

Read the full post for details and graphs.