Howdy, I'm teaching an ArcGIS Maps SDK for JavaScript college course, and this week we're covering rendering. One of the Rendering sample codes doesn't seem to render properly though, loading incredibly slowly and never completely even though the datasets are pretty small and simple (Edit: as of 12/3/25 the Sample Code seems to have been removed from the Esri website. My codepen below still has it, I assume that it will be updated soon and returned to the Esri sample code website). I even tried converting it over to components (https://codepen.io/antoniomedrano/pen/PwNmwNB?editors=1000), but no improvement (Edit: the CodePen works now with the new Feature Layer provided below by @UndralBatsukh). Then I opened up the highways feature layer in ArcGIS Online and found that it loaded really slowly there too, so I'm guessing the problem is something with the data itself. Is this buggy sample code something that Esri is aware of? I would love for it to work smoothly, thanks!
