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Middle-mouse-button scrolling slow on some pages
Reported by
ayman.ca...@gmail.com,
May 29 2018
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Issue descriptionUserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36 Steps to reproduce the problem: 1. Go to the known problem website, YouTube 2. Press and hold the middle mouse button and quickly move the mouse down to scroll down quickly 3. Once at the bottom, let go, re-click and do the same thing upwards. 4. Repeat. What is the expected behavior? Chrome should scroll up and down smoothly and in correspondence with the distance of the cursor to the middle-mouse-button click point. What went wrong? The scrolling is laggy, choppy and slow for irregular periods of time immediately after beginning the scroll. Did this work before? Yes Unknown, several months ago (2017) Chrome version: 66.0.3359.181 Channel: stable OS Version: 6.1 (Windows 7, Windows Server 2008 R2) Flash Version: Shockwave Flash 29.0 r0 The bug does not occur in incognito mode or on any other website I've found so far. However, the layout of the YouTube page in incognito mode is the modern one, as opposed to the classic one in normal Chrome (my preferred one). I've tried enabling each extension I have in incognito mode to reproduce the bug, but no extension alone was able to do this.
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May 30 2018
Unable to reproduce the issue on Win-7 using chrome reported version #66.0.3359.181 and latest canary #69.0.3444.0. Attached a screen cast for reference. Following are the steps followed to reproduce the issue. ------------ 1. Navigated to youtube.com 2. Pressed and hold the middle mouse button and quickly moved the mouse down to scroll down quickly. 3. Once at the bottom re-clicked and did the same thing upwards. 4. Repeated the 2nd and 3rd steps. 5. Observed that chrome scrolled up and down smoothly as expected. reporter@ - Could you please check the issue on latest canary #69.0.3444.0 by creating a new profile without any apps and extensions and please let us know if the issue still persist or not. Thanks...!!
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May 31 2018
It maybe related to extensions you installed if it does not occur in incognito mode.
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May 31 2018
ayman.campbell@ Please try to reproduce it with a Chrome without any third-party extension.
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Jun 7 2018
ayman.campbell@, can you reproduce in Canary channel? If so, could you capture a performance trace and attach it here? Instructions: https://www.chromium.org/developers/how-tos/submitting-a-performance-bug
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Jun 14 2018
The NextAction date has arrived: 2018-06-14
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Jun 14 2018
I was finally able to repeat it on the old YouTube layout. Yes, it occurs on this website with this layout without any extensions in Chrome Canary 69.0.3457.2. It's the only place I've experienced the bug.
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Jun 14 2018
Thank you for providing more feedback. Adding the requester to the cc list. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jun 14 2018
Here's the performance trace in Canary. I was also unable to repeat it in Firefox with the old YouTube layout, so it's definitely a Chrome issue.
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Jun 14 2018
I did one with the new layout (no bug) too for reference.
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Jun 15 2018
Unable to reproduce the issue on Win-7 using chrome latest stable #67.0.3396.87 and latest canary #69.0.3457.2. Following are the steps followed to reproduce the issue. ------------ 1. Navigated to youtube.com 2. Pressed and hold the middle mouse button and quickly moved the mouse down to scroll down quickly. 3. Once at the bottom re-clicked and did the same thing upwards. 4. Repeated the 2nd and 3rd steps. 5. Observed that chrome scrolled up and down smoothly as expected. As the issue is not reproducible from TE-end. Hence, removing the Needs-Bisect label and requesting some one from Blink>Scroll team to please have a look into the issue. Thanks...!!
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Jun 16 2018
Let me add more steps to reproduce, to get the old YouTube layout: 1. Go to the known problem website, YouTube 2. Enter the developer console (Ctrl+Shift+I) 3. Click on the tab "Application" 4. Open "Cookies" in the sidebar and click on the entry for youtube.com 5. Find the element "PREF" and replace the value with "f6=8" 6. Refresh the page. 7. Press and hold the middle mouse button and quickly move the mouse down to scroll down quickly 8. Once at the bottom, let go, re-click and do the same thing upwards. 9. Repeat.
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Jun 18 2018
Thank you for the extra information. Unfortunately I still can't repro. The trace in #9 does show the renderer choking but it looks like the traces are corrupted, events in the renderer seem to take no time. Perhaps that version was broken, could you try capturing a trace again on the latest Canary (I just tried on 69.0.3464.0 tracing looked fine). Otherwise I suspect something else on your system may be broken.
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Jun 19 2018
@Reporter: Could you please respond to comment# 13 and provide traces of latest canary, hence adding Needs-Feedback label to it. Thanks!
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Jun 19 2018
@bokan I just updated my Canary to 69.0.3465.0 and can no longer reproduce the bug. It seems to be fixed in at least your version (69.0.3464.0).
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Jun 19 2018
Thank you for providing more feedback. Adding the requester to the cc list. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jun 19 2018
Thank you, in that case I think the only thing we can do is wait until that ships. I'll close the bug but feel free to reply if you see it again in newer versions. |
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Comment 1 by susan.boorgula@chromium.org
, May 29 2018