CBL Optimal Decoding & Date Decoding Inconsistencies

As part of trying to optimise time spent on large queries (fetch + decode), i am trying to find the fastest solution to decode results.
At the moment, the fastest way i found by my benchmarking that works reliably is manually mapping the values inside a result to my local object. While this adds a good chunk of boilerplate, going through .toJSON(), then serialising the JSON and then decoding it is much slower in my tests.
However, there is another API in the CouchbaseLiteSwift package both on Result and ResultsSet (.data(as: _)) that I would like to test but that seems to break for dates.

So my questions are:

1. Is the .data(as: _) API broken or am I doing something wrong?
2. What is the fastest supported way to decode a result, regardless of how much code it implies?
   Thank you!

Example for reference:

struct Foo: Codable {
	let id: String
	let name: String
	let someDate: Date?

	// ALWAYS FAILS
	static func fromData(_ result: Result) throws -> Foo {
		try result.data(as: Foo.self)
	}


	// WORKS RELIABLY (fastest decode strategy i found thus far)
	static func fromFields(result: Result) throws -> Foo {
		guard
			let id = result.string(forKey: "id"),
			let name = result.string(forKey: "name")
		else {
			throw NSError()
		}

		let someDate = result.date(forKey: "someDate")
		return Foo(
			id: id,
			name: name,
			someDate: someDate
		)
	}
}

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