Originally Posted by
N4Newbie She hasn't complained yet, but it has only been installed for about 48 hours.
Try rebooting your phone again. If you were previously using any developer's options, try disabling them.
You might want to try wiping the cache partition also:
Still going OK for your wife? My phone has not gotten any better at all. I rebooted, and I cleared cache. I disabled all developer options (The only thing I was doing was decreasing the transition animations). Yesterday I was at the state fair for a few hours, only had the screen on for a short while to send a few texts, and was down well below 40%. Before Oreo, I would probably have been in high 80s or low 90s for the same trip/usage. Today I'm going on a short trip (8 total hours where for 6 of those hours the phone will be in my pocket doing nothing) and I'm forced to bring my large battery travel charger - something I'd definitely not have to do before Oreo.
I even tried some changing the GPU renderer as described in articles such as this:
Nexus 5X runs slow after installing Android Oreo [Fix] | Mobile Internist
However, while that may have helped a little bit, it also made some camera and photo tasks impossible. It also doesn't stay after a reboot, so you need to make that change each time the phone reboots.
I'm definitely not a power user in any way - I currently have three photos on my phone, about 1 GB of MP3s, no games, nothing more exotic than Lyft and Netflix. My wife is using my old Nexus 5 (aka the best phone in the world), and the hope was that when I get my Pixel 2 next month, I can give her this phone - a two year newer phone that still gets security updates. Perhaps when I factory reset to give her a clean slate, whatever the issue is will go away. The irony is that her only complaint about the 4 year old Nexus 5 is the battery life!