优化映射数组

Question

我有 125k 测试用例，需要 1 分 30 秒才能得到结果。有什么选项可以优化我的映射吗？谢谢。。

 const getEachValueByLine = () => {
    if (IsJsonString(multipleValue)) {
      setInvalidFormat(true)
      isValidRegex ? setValidRegex(true) : setValidRegex(false)
      const parseValue = Object.entries(JSON.parse(multipleValue))
      const addId = parseValue.map((item, index) => ({ id: index, case: item[0], expected: item[1] }))
      handleMultiValidate(addId)
    } else {
      setInvalidFormat(false)
    }
  }

问题从这里开始：

const parseValue = Object.entries(JSON.parse(multipleValue))
const addId = parseValue.map((item, index) => ({ id: index, case: item[0], expected: item[1] }))

Answer 1

你试过big-json吗？

const fs = require('fs');
const path = require('path');
const json = require('big-json');
 
const readStream = fs.createReadStream('big.json');
const parseStream = json.createParseStream();
 
parseStream.on('data', function(pojo) {
    // => receive reconstructed POJO
});
 
readStream.pipe(parseStream);