pushing to thousands of installations

[fasa23]

Im currently sending push notifications to my app from my parse-server on DigitalOcean.

I have almost 20K installations and when I send a push to all of them, it takes almost 20 min to be received on the iphone.
In my case this is awfull because I notify soccer matches and users want to know as soon as their team scores a goal.
Ive seen on the parse-server documentation that push notifications "Does not support super high throughput since it does not employ a job queue system" and im assuming the server is sending push notifications one by one and thats why my console logs every second:

"Notification transmitted to:" + device.token.
But it takes to much time to receive the notification on the iPhone, I think my token is one of the last on that loop.

I would like to know if i can modify any file to avoid the loop and send the push notification faster, Ive found a file under parse-server/node_modules/apn/examples/sending-to-multiple-devices.js where I found this function

// If you plan on sending identical paylods to many devices you can do something like this.
function pushNotificationToMany() {
    console.log("Sending the same notification each of the devices with one call to pushNotification.");
    var note = new apn.notification();
    note.setAlertText("Hello, from node-apn!");
    note.badge = 1;

    service.pushNotification(note, tokens);
}

So. Is there a way i can call to this function from cloud code? because when I use Parse.Push.send() from cloud code I assume my server is using this other function (service.on) inside sending-to-multiple-devices.js and thats why i get that log on my console each second

service.on("transmitted", function(notification, device) {
    console.log("Notification transmitted to:" + device.token.toString("hex"));
});

Im currently using no adapters to push my notifications, Ive seen OneSignal is a great option but the problem is that users who dont update the app will still be hitting parse installations records (so their subscriptions to soccer teams might be modified and I wouldnt be capable of noticing it) I would be really happy if theres an alternative in wich I dont have to implement any Push Adapter

Sorry for my english

[flovilmart]

I'd gladly accept a PR for using the token list, that should not be that difficult to implement.

[fasa23]

Please could you implement it? And also please give an example on how to use that token list directly from cloud code. I'm pushing to users who are subscribed to a Channel using parse.query to get the users installations who have to receive the goal-scored notification.

[flovilmart]

Please test from #10

If you wanna use if from cloud code, I can't really help, I'm not a hotline for special implementation needs.