My question concerns speed of internet connection.
On my iMac (5K retina 2015) my internet connection is too slow for one particular web site whose videos I want to watch. If I try the same site with my iPhone XR it's fine (except that the subtitles don't keep pace with the audio). Both machines are connected to the home router using WiFi. So I use Ookla to measure the speed, and it reports somewhere around 7Mbps for the iMac, and between 20 and 35 Mbps for the iPhone. The iMac is situated in a room separated from the router by concrete walls and floors, but the iPhone in that room is still much faster. Indeed using the iPhone to provide a hotspot for the iMac, the iMac performs as fast as the iPhone. I have also tested other devices, all in the same room as the router. These include an iPhone SE2, an iPad Pro (2020), and a MacBook Air M1. All of these report a similar speed to the iMac, ie around 7Mbps. Not that I'm complaining, but how come the iPhone is so much faster than the rest? And can anything be done to improve the speed on the other devices?
iMac 27″, macOS 11.4