Thanks for this.

(a sort of breaking change, though it's in internal namespace)

We need to be very careful. Public APIs in an 'internal' namespace are likely called by source generated code and thus outside of our control and likely to break if the library changes them.

I do think one method should be reverted. But if you can prove me wrong with sharplab.io release build JIT output, I'll accept what you have here.

Pull Request Overview

This PR optimizes performance by removing unnecessary GetTypeInfo() calls throughout the MessagePack codebase. The optimization leverages the fact that many properties that previously required TypeInfo can now be accessed directly on Type objects.

• Replaces type.GetTypeInfo() calls with direct Type property access
• Removes intermediate TypeInfo variables where no longer needed
• Adds new overloaded extension methods to support Type instead of TypeInfo

Reviewed Changes

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Looks good. Just a few redundant methods to consolidate and it will be good.

Thanks