Topic: Is MySQL 5.6 slower than MySQL 5.5 ?

[Steffen]

For your info.

There have been number reports/benchmarks showing MySQL 5.6 to be slower than MySQL 5.5 on variety of workloads. There are many possible reasons and I believe we will learn about many of them in the next few weeks and months as MySQL 5.6 is starting to get production battle tested and there is inflow of real world production performance data hitting MySQL Support Team at Oracle. For number of Simple workloads I would expect to see some slowdown – MySQL 5.6 Optimizer got a lot smarter and the more plans have to be considered for the query the more time the query optimization is likely to take. I also would expect newer code to benefit from “polishing” and clean up to achieve the best performance possible.

Read more... http://www.mysqlperformanceblog.com/2013/02/18/is-mysql-5-6-slower-than-mysql-5-5/

Steffen