Internet Speed at a Glance is a free online speed test which gives you a quick indication of your download speed in bits per second.
Unlike other speed tests only one file, just the HTML page, is downloaded.
To make sure that the result is as accurate as possible, this speed test
If you still wonder how it is possible that this speed test gives you Internet Speed at a Glance, you should realise that the page Internet Speed at a Glance is circa one third in size compared to the average size of a webpage according to http archive.
Hence the website performance of Internet Speed at a Glance is excellent according to GTMetrix, PageSpeed Insights and Pingdom Tools. So you will really get an indication of your Internet Speed at a Glance.