New Client is Obscenely Slow

Is anyone else finding the new client slow? There are times where I can't ban a champ because the counter judders down to 0 before I can even select a champ to ban. Then "You have been banned for another 5 minutes even though you weren't afk". This mainly happens when I'm on my laptop without the power plugged in, but it is in 'high performance' power mode. If I do get into a game I still load before most people so it's not the laptop, it must be a performance issue with the client. Is anyone else experiencing similar behaviour? Riot please fix.
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