Into the function for copy data from input into output struct, Fast when large data, Single-Level Struct Support Benchmark: Benchmark_Manual-10 3096486 364.7 ns/op Benchmark_Into-10 487270 2312 ns/op How to use: type Input struct { Field1 int `json:"field1"` Field2 int `json:"field2"` Field3 int `json:"field3"` Field4 int `json:"field4"` } type Output struct { FieldFloat32 float32 `json:"field_float32"` FieldFloat64 float64 `json:"field_float64"` FieldInt int `json:"field_int"` FieldInt8 int8 `json:"field_int8"` FieldInt16 int16 `json:"field_int16"` FieldInt32 int32 `json:"field_int32"` FieldInt64 int64 `json:"field_int64"` FieldUint uint `json:"field_uint"` FieldUint8 uint8 `json:"field_uint8"` FieldUint16 uint16 `json:"field_uint16"` FieldUint32 uint32 `json:"field_uint32"` FieldUint64 uint64 `json:"field_uint64"` FieldString string `json:"field_string"` FieldBool bool `json:"field_bool"` FieldAny any `json:"field_any"` FieldError error `json:"field_error"` } input := Input{ Field1: 1, Field2: 2, Field3: 3, Field4: 4, } var output Output Into(input, &output) fmt.Printf("%+v\n", output) // Output: {Field1:1 Field2:2} */.

TinyInto unsupported error type, Fast when small data, Multiple-Level Struct Support.