Question [Q] Extremely slow wifi

I am getting extremely slow Wifi speed on the latest Verizon stock 4.3 ROM.

Now i remember correctly in AOSP rom, there was an option to disable power saving mode in the wifi menu. But I dont see that option in the stock rom. I suspect that is throttling my wifi speed.

Also tried to access hidden menus and all the codes do not work anymore.

Anyone knows anything to fix the Wifi speed??
Galaxy S3 on CM10