How to make the unmarshaling process of json int array faster?

[kuaikuai]

code as the flow:
`func UnmarshalIntVector(size int, data string) ([]int32, error) {
if size < 0 {
return parseInt32(data)
}
var out []int32
if size > 0 {
out = make([]int32, 0, size)
}
err := sonic.UnmarshalString(data, &out)
if err != nil {
return nil, fmt.Errorf("UnmarshalIntVector json error: %s", err.Error())
}

if size == 0 {
	return out, nil
}
length := len(out)
if size != length {
	return nil, fmt.Errorf("UnmarshalIntVector needed size %d != len %d", size, length)
}

return out, nil

}`

[AsterDY]

Didn't get what you mean. give more explaination