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No smooth scrolling in Opera?

  • @leocg sapsalis. Need to try with mozilla or chrome to se the difreence i think.

  • Is this with a monitor with a high refresh rate? Using high DPI?

  • Scrolling seems normal here, at least using a mouse.

  • @leocg In 2 different PC's (a try), Opera browser, on this page, have scrolling problem. It''s a bit heavy i mean than smoother than the other browsers. Chrome and Mozilla have very smooth scrolling (2).

  • @burnout426 I don't know, but if it is, why chrome and mozilla it's much better on this?
    If i understand the question correctly.

  • @panosv There are a few cases where Opera's UI performance is limited to 60fps. I'm not sure if this is one of them.

    I tested https://www.sapsalis.gr/ with both Chrome and Opera with chrome://flags/#smooth-scrolling and chrome://flags/#disable-threaded-scrolling both set to "enabled", on a 60hz monitor (default DPI), Scrolling with mouse (right-side of trackpad) is really choppy in both Chrome and Opera. It's about the same. If there's a difference, Chrome might be a super-tiny-bit better, but it's super-close. It's just as bad in Vivaldi (another Chromium-based browser).

    When I test in Firefox with smooth scrolling though, it's smooth as butter. Tested in Edge and it's pretty smooth too (although I don't know if Edge supports smooth scrolling).

    In short, I'm guessing it's an issue with Chromium. I guess depending on CPU and GPU and monitor refresh rate though, it might be better in Chrome than other Chromium browsers. But, I don't know.

  • It's a different request. Also, this topic is not exactly a request.

  • @burnout426 "is really choppy in both Chrome and Opera" hmmm, weird, to me, in Chrome, it's smooth on "top level" (no choppy). Even more smooth in Mozilla, have nice scrolling display.
    "I'm guessing it's an issue with Chromium", i don't know much about that, but maybe.
    Thanks for did that and update.

  • I'm trying the suggested "Smooth Scrolling" extension at the moment; can't quite tell yet if it's fixed it or not; scrolling still feels low framerate, if perhaps not quite as jerky when decelerating.

    EDIT: After loading the "Opera" profile and testing out further, it definitely improves scrolling a lot in Opera. It's still a low framerate, meaning there's some ghosting (can't measure, but am guessing ~20fps), but it feels a lot smoother. What a pity Opera can't have something like this by default.

  • My monitor is a 1920x1080 display, not sure if it qualifies as "high DPI", since it isn't 4K, but I do have to go into a lot of older programs and set compatibility settings to override DPI scaling behaviour and set it to "scaling performed by: Application", to avoid them being blurry.

    What difference should hardware acceleration make to scrolling? I have it enabled, but I've got 2017/2018 high-end laptop hardware. Opera should perform better by default than it does.

  • @leocg said in No smooth scrolling in Opera?:

    Scrolling seems normal here, at least using a mouse.

    From my day-to-day usage, scrolling with a desktop mouse feels normal, it's only with a touchpad that I've noticed "low framerate"/jerky scrolling.

  • Further issue: sideways scrolling is not responsive at all. e.g. pinch to zoom, then try and scroll around horizontally/diagonally with two fingers. Compare performance between Opera and Microsoft Edge. Edge performs this function much better, though Opera is otherwise the better browser. In Opera, two-fingered horizontal/diagonal scrolling is very hit-or-miss, usually not working at all.

  • After further testing, the smooth scrolling extension seems to have made minimal/no difference to the low framerate jerky scrolling, making it worse on occasion... After disabling it, scrolling went back to a more steady, but still <10fps scrolling, though now seemingly more responsive to diagonal/sideways scrolling.
    I wish to submit that this low-framerate scrolling with touchpads/Windows Precision touchpads is a bug in Opera.

  • when opening that page https://www.sapsalis.gr/ and then opening Opera's task manager it shows that even when not scrolling the page is eating up inordinate amounts of CPU time and the memory usage continuously climbs and scrolling is also really bad here too using a mouse it feels like adsl days of 2~4Mb speeds not the Gigabit speed I have and it's just jerky jerk jerk all the way down the page

  • @darthagnon said in No smooth scrolling in Opera?:

    I wish to submit that this low-framerate scrolling with touchpads/Windows Precision touchpads is a bug in Opera.

    https://bugs.opera.com/wizard/desktop

  • Thank you, @burnout426 for linking the bug report website; I didn't know where it was. I have submitted a bug report just now.

  • DNAWIZ-41754 for reference.

  • This is really weird... I was on O_55.something (the version where you fixed that "New Tab Omnibox not focused" bug), then this afternoon, I updated to O_55.0.2994.61, and scrolling feels a lot better... Not sure if it's fixed yet or not. Will keep y'all posted.

  • @burnout426 Hi, what is "DNAWIZ-41754"?