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Loading gif hanging on expensive render

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@Eddie.Sholl wrote:

To help improve the user experience of a particular expensive transition and render, I've been using a more friendly loading spinner. Rather than using a full loading route, it's a centered div with an animated gif, that is displayed using the loading event.

On large customers, this particular render is churning over several hundred models and turning them into a grid. When this begins, the gif hangs. This looks similar to http://discuss.emberjs.com/t/loading-gif-stops-animating-when-loading-objects/1782.

Are there any short term solutions that can help to allow the gif to keep updating, or is the browser thread simply locked as suggested in a few places elsewhere? Obviously any potential performance improvements will be a double win long term, but may take some time to attain, if ever. Paging is an obvious choice to at least try, and this looks pretty cool as well: http://runspired.github.io/smoke-and-mirrors/#/examples/infinite-scroll

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