applying transfer to react app

node_modules/bfj/test/performance.js

@@ -0,0 +1,38 @@
+#!/usr/bin/env node
+
+'use strict'
+
+const fs = require('fs')
+const path = require('path')
+const check = require('check-types')
+const bfj = require('../src')
+
+console.log('reading json')
+
+let time = process.hrtime()
+
+bfj.read(getDataPath('.json'))
+  .then(data => {
+    reportTime()
+    console.log('writing json')
+    return bfj.write(getDataPath('-result.json'), data)
+  })
+  .then(() => done('succeeded'))
+  .catch(error => done(error.stack, 1))
+
+function getDataPath (suffix) {
+  return path.resolve(__dirname, process.argv[2] + suffix)
+}
+
+function reportTime () {
+  let interimTime = process.hrtime(time)
+  console.log('%d seconds and %d nanoseconds', interimTime[0], interimTime[1])
+  time = process.hrtime()
+}
+
+function done (message, code) {
+  reportTime()
+  console.log(message)
+  process.exit(code)
+}
+