ICE gathering lasts 39-40 second in Electron application

I have simple hello-world application, which is builded by https://electronforge.io/

This application just creates Peer with simple-peer, like this:

var Peer = require('simple-peer')

function createClientPeer(onSignal) {
  var clientPeer = new Peer({
    initiator: true,
    trickle: false , // also I tried true
    config: { iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] },
  });

  clientPeer.on('error', function (err) {
    console.log('error', err);
  });

  clientPeer.on('signal', function (data) {
    let jsonData = JSON.stringify(data);
    console.log('SIGNAL', jsonData);
    onSignal(jsonData);
  });

  clientPeer.on('connect', function () {
    console.log('CONNECT');
    clientPeer.send('whatever' + Math.random());
  });

  clientPeer.on('data', function (data) {
    console.log('data: ', String.fromCharCode.apply(null, data));
  });

  return clientPeer;
}

And I try to create Peer like this:

  var clientPeer = createClientPeer(function (clientOffer) {
    console.log("createClientPeer", clientOffer);
  });

I have problem. I don’t get event about signal for 39-40 second (after that I get successful event and connection becomes ready for use).

I turned on logging and found out, where there is a pause:

\simple-peer\index.js:28 [Sun, 04 Nov 2018 21:10:26 GMT] _needsNegotiation
\simple-peer\index.js:28 [Sun, 04 Nov 2018 21:10:26 GMT] starting batched negotiation
\simple-peer\index.js:28 [Sun, 04 Nov 2018 21:10:26 GMT] start negotiation
\simple-peer\index.js:26 [Sun, 04 Nov 2018 21:10:26 GMT] signalingStateChange have-local-offer
\simple-peer\index.js:28 [Sun, 04 Nov 2018 21:10:26 GMT] createOffer success
\simple-peer\index.js:26 [Sun, 04 Nov 2018 21:10:26 GMT] iceStateChange (connection: new) (gathering: gathering)
\simple-peer\index.js:26 [Sun, 04 Nov 2018 21:11:05 GMT] iceStateChange (connection: new) (gathering: complete)
\simple-peer\index.js:28 [Sun, 04 Nov 2018 21:11:05 GMT] signal
webrtc-client.js? [sm]:18 createClientPeer2 Mon Nov 05 2018 00:11:05 GMT+0300 (Russia TZ 2 Standard Time)
webrtc-client.js? [sm]:20 SIGNAL {"type":"offer","sdp":"v=0\r\no=- 7804354501182328042 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=group:BUNDLE data\r\na=msid-semantic: WMS\r\nm=application 61312 

So, you can see, that there is 40 seconds duration between iceStateChange (connection: new) (gathering: gathering) and iceStateChange (connection: new) (gathering: complete).

It seems, that this is a Electron-specific problem. But I cannot understand, what is going wrong.

[t-mullen]

Try the source version of simple-peer, we recently added a timeout to ice completion that might help here. You’ll want to set trickle to false.

[Hixon10]

@t-mullen ok, thank you!