Hap Ac lite sirWhat Mikrotik device are you using?
so even i disable all firewall rules (mangle, firewall filter, raw) its still get 100 cpu ?The hAp ac lite has a slightly wimpy CPU, so having 100 tabs will easily bog it down. If you use a lot of internet-heavy sites then you might want to get a better router.
when i open 19 tabs (there are 10 udp connections and 9 tcp connections), it makes 78 list conncentions. cpu 100 %, so what should i do?Go into Firewall -> Connections when you have a bunch of tabs (like 50) and see how many it lists. Also check if you have any firewall rules that have to do with "fast path" or "fast track" because that's the key to unlocking better CPU usage in routers.