Optimize mapping an array

Question

I have 125k test cases and it takes 1 min and 30 secs before I could get the result. Is there any option to optimize my mapping? Thank you..

 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)
    }
  }

The problem starts in here:

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

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Ulagapandi UPMS
– Ulagapandi UPMS

2021-01-05 02:56:52 +00:00
Commented Jan 5, 2021 at 2:56 — Ulagapandi UPMS
– Ulagapandi UPMS, Commented Jan 5, 2021 at 2:56

Ulagapandi UPMS · Accepted Answer · 2021-01-05 02:58:12Z

0

did you try big-json?

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);

answered Jan 5, 2021 at 2:58

Ulagapandi UPMS

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2 Comments

Ayaka Over a year ago

how to use this? do I just need to put the getEachValueByLine code to the receive reconstructed POJO?

Ulagapandi UPMS Over a year ago

parseStream.on(multipleValue, function(pojo) { // your code }); use like this

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