[Feature Request] Support faster deserialization of `OneOf` based types

[filzrev]

Is your feature request related to a problem? Please describe.

Currently OneOfJsonConverter which is used for ApiPage deserialization is relatively slow.
As described at this comment lines

And when it's running on following conditions.
It's extremely run slower and can't debugging.
Because a lot of internal exception recorded to Visual Studio's Output window.

• Run on debugger attached environment.
• Just My Code option is off.

Describe the solution you'd like
I have no neat solution to this problem.
It might need to write custom converter for available OneOf<> combinations.