Major upgrade to AcJsonSerializer/AcJsonDeserializer:
- Add Utf8JsonReader/Writer fast-paths for streaming, allocation-free (de)serialization when reference handling is not needed, matching STJ performance.
- Populate/merge now uses streaming for in-place updates.
- Type metadata caches TypeCode, UnderlyingType, and uses frozen dictionaries for hot property lookup.
- Context pooling reduces allocations and GC pressure.
- Primitive (de)serialization uses TypeCode-based fast paths; improved enum, Guid, DateTime, etc. handling.
- Shared UTF8 buffer pool for efficient encoding/decoding.
- Pre-encoded property names and STJ writer for output.
- Improved validation, error handling, and double-serialization detection.
- Expanded benchmarks: small/medium/large, with/without refs, AyCode vs STJ vs Newtonsoft, grouped by scenario.
- General code modernization: aggressive inlining, ref params, ReferenceEquals, improved naming, and comments.
- Unified IId<T> and collection element detection; consistent $id/$ref handling.
Brings AyCode JSON (de)serializer to near-parity with STJ for non-ref scenarios, while retaining advanced features and improving maintainability and performance.
Loretta
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