I've had some weird internet issues since upgrading.
First of all, my wifi USB dongle stopped working so I thought it was broken, I replaced it and was getting speeds of under 1 Mbps.
Since then I have had very poor download speeds, and surfing has been a bit hit and miss with some sites loading instantly, and others crawling. everything was fine using the same hardware on 16.04
What can I do to speed things up?