Instructions
This test is meant to observe the impact of <link rel=prefetch fetchpriority=high>
.
It needs to be run on a remote HTTP/2 server with a device on 3G/4G/ADSL.
An image file named “image.bmp” must be present in the same directory. A 2 MB file can be generated with ImageMagick like so: convert -size 820x820 canvas:crimson image.bmp