Thank you so much.
It really works.

My environment:
ThinkPad T430 (500GB HD, 16GB RAM)
Windows 8.1 Pro 64bit
Opera 322bit 28.0.1750.48

My Opera is so slow. It is slow in below actions:

1. Open a new tab (Opera takes about 4 seconds, Chrome/FireFox takes far less than 1 second)
2. Open a new empty tab (Opera takes about 2 seconds, Chrome/FireFox takes far less than 1 second)
3. Close a tab (Opera takes about 1 second)
4. Scroll down when a page contains many pictures and the page is using lazy-loading pictures (Javascript is running). This is the sample page: http://ck101.com/thread-3224323-1-1.html

I don't think that's my network problem cause at the same time Chrome runs smoothly.

Anybody can suggest what actions I can do in order to improve the above actions?

Appreciate.