RFR: 8247532, 8248135: Records deserialization is slow + Build microbenchmarks with --enable-preview

[Brian Goetz]

Consider a ClassValue for this, if there is not an obvious bit to be 
repurposed somewhere.

On 6/23/2020 12:30 PM, Chris Hegarty wrote:
> I think it is worth considering caching the record-ness state of a j.l.Class, as I’m sure it will be widely used in third-party serialization libraries, as well as by Java Serialization.