fix: multiple performance fixes for type serialization feat: adds to identifier mapping to non nullable enum

[baywet]

Signed-off-by: Vincent Biret [email protected]

[sonarqubecloud]

Quality Gate failed

Failed conditions
79.0% Coverage on New Code (required ≥ 80%)
B Maintainability Rating on New Code (required ≥ A)

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[MaggieKimani1]

I understand that using a bitwise operation to determine the number of flags set on JsonSchemaType is more efficient (O(1)) than using the iterative count (O(n)) as I had implemented. However the performance gain seems minimal if JsonSchemaType contains only a few flags (e.g., up to 3).

[baywet]

It's not just the loop, it's also:

• Enum.GetValues needs to go through the type system to get the information, which is much slower\
• Assigning count multiple times is slower than a single bitwise instruction

(besides the other improvements in terms of "caching" the enum values, avoiding auto-boxing, etc...