Go Struct Field Reordering Optimization

Rewriting the first struct into the second (reordering fields) can improve performance and reduce memory usage due to better alignment:

type BadStruct struct {
    age          uint8
    IdCardNumber uint64
    DateOfBirth  uint16
}

type GoodStruct struct {
    age          uint8
    DateOfBirth  uint16
    IdCardNumber uint64
}

Reason: Group smaller fields together to minimize padding inserted by the compiler for alignment.