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    Opera is very slow and uses a lot of CPU while typing URL if a lot of Windows are opened

    Opera for Windows
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    • opera-user-from-2002
      opera-user-from-2002 last edited by opera-user-from-2002

      I have noticed this after upgrading from 85.0.4341.60. The issue can be reproduced even on a fresh install on a 87.0.4390.36 (latest version for now). Steps to reproduce:

      1. Launch Opera.
      2. Open 20 windows.
      3. Start typing aaaaaaaaaaaaaaaaaaaa in the address bar.
      4. See the lag and high CPU usage while typing.

      It is almost impossible to use Opera due to this issue.

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      • Referenced by  opera-user-from-2002 opera-user-from-2002 
      • Referenced by  opera-user-from-2002 opera-user-from-2002 
      • Referenced by  opera-user-from-2002 opera-user-from-2002 
      • Referenced by  opera-user-from-2002 opera-user-from-2002 
      • opera-user-from-2002
        opera-user-from-2002 last edited by

        Btw, there are few similar topics describing performance issues. I suggest the main reason is the same.

        https://forums.opera.com/topic/55629/opera-slow-to-load
        https://forums.opera.com/topic/55879/opera-is-slow-and-hangs-in-pages-with-multiple-panels
        https://forums.opera.com/topic/55908/slow-speed-dial-after-recent-update

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        • opera-user-from-2002
          opera-user-from-2002 last edited by

          I have performed additional testing:

          Opera 85.0.4341.75 is not affected
          Opera 86.0.4363.23 is affected.

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          • opera-user-from-2002
            opera-user-from-2002 last edited by leocg

            Ok, I’ve found a temporary workaround until a patch is released.

            As a breaking change was introduced in version 86 let's read the changelog:

            Categories in Address Bar dropdown
            The Address Bar dropdown now shows results in categories, such as History, Bookmarks and Search. This makes it quick and intuitive to find the result you’re looking for.

            Looks promising. Let’s check if we can disable this via opera://flags. There is an option named "Address bar dropdown categories" with a description "Display categories in the address bar dropdown. - Mac, Windows, Linux".

            Let’s disable it and relaunch the browser.

            Opera is not slow anymore.

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