Struct Field Mapping With Custom Json Tags And Unknown Field Handling

Fast JSON serializer for golang.

Unique: Generates type-specific field mapping code at build time with configurable unknown field handling (ignore/error/store) and custom JSON property names via tags, avoiding reflection-based field lookup overhead during unmarshaling

vs others: More efficient than encoding/json's runtime tag parsing and reflection-based field lookup; supports unknown field strategies (store/error) not available in standard library