stats.js

const dataFile = require(process.argv[2])

const traverse = function(path, node, depth, maxDepth, outputArray) {
  if (depth > maxDepth) {
    return
  }

  for (key in node) {
    const child = node[key]
    const newPath = `${path}/${key}`
    const size = JSON.stringify(child).length
    if (newPath.endsWith('rows/items') || size < 1024) {
      continue
    }
    console.log(newPath);
    const obj = {
      path: newPath,
      size: size
    }
    if (newPath.endsWith('cellStorage/rowBuffers')) {
      var value = child[Object.keys(child)[0]]
      for (var i = 1; i < child.length; i++) {
        var temp = child[Object.keys(child)[i]];
        if (temp.length > value.length) {
          var value = temp
        }
      }
    
      obj['sampleRow'] = Buffer.from(value, 'base64').toString('utf-8').replace(/[^\x20-\x7E]/g, '?')
      outputArray.push(obj)
      continue
    }

    outputArray.push(obj)
    if (node instanceof Object) {
      traverse(newPath, child, depth + 1, maxDepth, outputArray)
    }
  }
}

const outputArray = []
traverse('/', dataFile.data, 1, 16, outputArray)

const fs = require('fs')
//fs.writeFileSync('./data-export.json', JSON.stringify({ data: outputArray }, null, 2))

var tsv = ""
outputArray.forEach(i => {
  tsv += `\n${i.path}\t${i.size}\t${i.sampleRow || ''}`
})

fs.writeFileSync(process.argv[2] + '-export.tsv', tsv)