finding most common senders in gmail - apps script

appsscript.json

{
  "timeZone": "America/New_York",
  "oauthScopes": [
    "https://www.googleapis.com/auth/gmail.addons.execute",
    "https://www.googleapis.com/auth/gmail.readonly"
  ],
  "gmail": {
    "name": "find common gmail senders",
    "logoUrl": "https://www.gstatic.com/images/icons/material/system/1x/receipt_black_24dp.png",
    "primaryColor": "#41f470",
    "secondaryColor": "#94f441"
  },
  "exceptionLogging": "STACKDRIVER",
  "runtimeVersion": "V8"
}

Gmail Group By Sender

// this is pretty quick and rough.. but it works
// script.google.com
// settings to allow editing the appscript.json
// set these two files
// then hit Run with function 'run'


const all = {};

function run() {
  collect();
  const commonsenders = Object.entries(all).sort((a, b) => b[1] - a[1]).filter(ent => ent[1] > 1);
  commonsenders.forEach(sender => {
    console.log(sender.join(':'));
  });
}

function collect() {
  for (const start of [0, 500, 1000, 1500, 2000])
  for (const thread of threads = GmailApp.getInboxThreads(start, 500)) {
    const msgs = thread.getMessages();
    const msg = msgs[0];
    const from = msg.getFrom();
    all[from] = all[from] || 0;
    all[from]++;
  }
}