I have a meteor chat app that consumes >100% CPU on the client side. Server code runs smoothly.

Chrome profiler shows program uses that amount of CPU

Kadira CPU profiler shows nothing specific but regular low-level functions.

I have a meteor chat app that consumes >100% CPU on the client side. Server code runs smoothly.

Chrome profiler shows program uses that amount of CPU

Kadira CPU profiler shows nothing specific but regular low-level functions.

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Yes, I'm gonna answer to my question. At least I have something to say.
At first look at this awesome Kadira debugger. They e-mailed me with the link, I hope they will announce it soon. What I can say is that it is more than you get with regular Chrome debugger.
https://github.com/kadirahq/meteor-debug
At second I noticed that a huge amount of CPU consumption is related to guess what.. animated loaders/pre-loaders/progress-bars. In my case, to show/hide it smoothly I used
opacity:0instead ofdisplay:none. It worked really well if not talking about CPU.