Brain.js: Brain JS causes Google Chrome to become unresponsive

[sts-ryan-holton]

What is wrong?

When Brain JS is training, Google Chrome browser tab becomes unresponsive/crashes and only becomes responsive again after training is complete, which could take many minutes.

Where does it happen?

When running in Google Chrome from index.html file

How do we replicate the issue?

1. Copy contents from code example into a *.html file locally on Macbook: https://codepen.io/sts-ryan-holton/pen/RwweqEX
2. Run in browser

How important is this (1-5)?

5

Expected behavior (i.e. solution)

The browser tab should remain responsive during training as deploying Brain JS to a production site could cause the whole browser tab to crash on slower systems.

Other Comments

[mubaidr]

Training is computationally expensive, so you should try to train the network offline (or on a Worker) and use the toFunction() or toJSON() options to plug the pre-trained network into your website.

There are following ways to avoid this:

• Train offline and then load exported network: https://github.com/BrainJS/brain.js#json
• Use web-workers for training: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers

[sts-ryan-holton]

@mubaidr I've already looked at both parts of the documentation, and have tried using the JSON feature in another issue I've opened and can't see any difference, please provide a code example on how to use this?

[mubaidr]

In your case it seems like data is not enough. Network is not able to reach error threshold. Please enable log: true in training option, as specified here: https://github.com/BrainJS/brain.js#training-options