缓冲区到字符串?

对于字符串解码而言,方法1比2的优势是什么?

方法1:

const { StringDecoder } = require('string_decoder')
const decoder = new StringDecoder('utf-8')
let body = ''
req.on('data', data => {
  body += decoder.write(data)
})

方法2:

let body = ''
req.on('data', data => {
  body += data.toString()
})