Bug 235230 - [macOS] Scrolling webpages is jumpy when flinging on a trackpad
Summary: [macOS] Scrolling webpages is jumpy when flinging on a trackpad
Status: RESOLVED MOVED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Scrolling (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL: https://html.spec.whatwg.org
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2022-01-14 05:47 PST by Myles C. Maxfield
Modified: 2022-01-14 16:09 PST (History)
4 users (show)

See Also:

Attachments
Repro (14.55 MB, video/quicktime)
2022-01-14 05:47 PST, Myles C. Maxfield 		no flags Details
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Description Myles C. Maxfield 2022-01-14 05:47:15 PST 
Created attachment 449166 [details]
Repro

See attached video.

From looking at the video frame by frame, it looks like there's one frame where the page doesn't scroll, and then the next frame where it scrolls 2x as far. Qualitatively, it feels pretty uncomfortable to me.
Comment 1 Myles C. Maxfield 2022-01-14 05:47:41 PST 
This is happening on a (very very) recent macOS Monterey with ToT WebKit.
Comment 2 Myles C. Maxfield 2022-01-14 05:52:27 PST 
This doesn't happen in AppKit-based apps on the same system. It makes WebKit feel comparatively worse.
Comment 3 Myles C. Maxfield 2022-01-14 05:53:06 PST 
Doesn't happen in Chrome.
Comment 4 Radar WebKit Bug Importer 2022-01-14 13:35:58 PST 
<rdar://problem/87616361>