[kijin]

Yes, it seems that Oracle does care about performance in high-concurrency applications: https://www.mysql.com/why-mysql/benchmarks/

Even their own benchmarks show MySQL 5.7 dipping below previous versions at the low end of the concurrency scale.

[mdcallag]

Yes, context is everything when looking at benchmark results. I am showing the worst-case for this performance regression. Thanks for mentioning that. Note, that is my blog.

I also showed the impact for IO-bound workloads, and even there the regression is larger than I want. But not as bad as the in-memory workloads.