Then I can do a wild assuming and say that you have a 32-bit OS?
What I suggest is that you make a bug report where you provide all informations and details you have. Here's the link to the bug reporter:
https://bugs.opera.com/wizarddesktop/

Yes I have a 32-bit-OS. Thank you for the link. By the way, is Opera a clone of Chrome?

@gustavwiz Thank you for responding. What other versions are available?

Opera Beta and Opera stable. Do you have the same problem there?

Opera Beta and Opera stable are not available for 32 bit.

@gustavwiz Thank you for responding. What other versions are available? It runs well in older versions such as 12.16

Yes, but 12.16 is Opera Presto, which is a totally different browser.
May be a stupid question, whatever, here is: what's your default search engine?

I already tried switching from yandex to google search engine which makes no difference.

@gustavwiz Thank you for responding. What other versions are available? It runs well in older versions such as 12.16

@hibou57
Thank you for responding. I checked out the case in the link, both issue are different. It seems to be painting/drawing issue in the link. Mine seems to be a query issue.It's a kind of lag in application's address bar query API. I installed 4.0.3-040003-generic kernel.

Hi;
I am on Ubuntu 14.04.2 platform. I have "Opera developer 32.0" installed. It starts faster as compared to other browser but when I type in address bar letters appear after 10 seconds. I wonder it's a bug or related to my distro.