Hi
I have problem about CPU & Memory on Opera Dev 50. When I updated to 50.0.2753.0, CPU and memory is used higher more than previously version(Opera Dev latest 49 version before up to 50).
It's just open program and wait about 5-10 minutes, CPU and Memory are used high and hang or freezing. I'll tried to disable any addon and it doesn't work. I'll tried end procress by Task manager on browser(by Shift + Esc) and close any tab + running background so it doesn't work too.
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I closed any tab + running background by Task Manager. See image
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And this is graph of running CPU and Memory. It's very strange... 
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And the last one is all procress running while open Opera Dev 50.0.2753 browser.
So it's a bug? if not, how to solve this problem?
Opera Dev 50.0.2753
Windows 7 64-bit