Download From Apple Store Very Slow

I am using testflight for beta test.
Download from apple store very slow. This seems to occur only in the evenings during heavy usage periods but not at all early in the morning or during the day. Like 15 minutes to download a 100mb app. From time to time however the app store is slow either the browsing within the store is sluggish or you encounter slow download speeds in the app store there are a number of possible issues causing a slow app store.
Apple suggests these causes for slow itunes or app store downloads. Any downloads from the app stores and apple s software update servers are extremely slow. The problem could be related specifically to your itunes account.
So if a developer removes a product but the app store has not updated its storage area you may receive various error messages and an inactive progress bar. I have tried changing the dns to both open dns and google public dns and none of them seem to fix the problem. The same thing is happening in the app store with download speeds averaging around 256 kilobytes per second.
Try logging out of your apple id under the app store settings on your mac or ios device and then logging back in again. The reason this may improve download speeds is that dns servers may return endpoints to apple s cdn according to the location they think you are coming from. Your internet connection is too slow.
Itunes or the app store lost connection to the internet. Afterwards try the download again and see if starts to download at the expected download speeds. The ios app store is the subject of continual improvements by apple be it speed or user friendliness.
And they work just fine very fast when connected to my carriers cellular network. There are cases when download speed is related to particular applications a decrease in speed is a result of miscommunication between the developers and app store. Apple disclaims any and all liability for the acts omissions and conduct of any third parties in connection with or related.