IE 11 slows to a crawl with jsapi app

[BillBrodie]

I have an arcgis js application heavily using esri.layers.GraphicsLayer s to display enterprise data (ASP.NET MVC Web API backend).  I am troubleshooting poor performance for IE 11 vs Chrome or Edge.  The IE 11 environment slows down after a few dozen map operations whereas Chrome and Edge are fine.  The app has multiple concurrent instances of esri.Map in separate UI panes.

My question is not whether IE 11 sucks - but rather are there any performance-related tweaks, configuration or coding techniques to help IE 11 along? 

Thanks, Bill

[JeffJacobson]

One thing you can do is see if there is any non-UI code that you can do on another thread using Web Workers. (Web Workers should be supported in IE 11.)

[BillBrodie]

Thanks, Jeff. I will pass this idea to the team to investigate web workers & let you know. Regards, Bill.