Cherry-picked IMHO isn't necessarily the right label for that. They don't claim they made an universally 30% faster redis, they clearly say one of the things they did improved performance for a specific case.
If anything, the OP here is misleading by quoting it as a general improvement.
I take that to mean repeated connect/set-get/disconnect. Like you might get from a client in a fastcgi scenario...php for example.
Maybe add the -k 0 flag to the benchmark and a low-ish number of concurrent clients.
> In short connection scenario, ApsaraCache makes 30% performance increase compared with the vanilla version.
sounds like a cherry picked case to me