Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: c45540108d1deae5e94310fa66f8ea7b0287cfe2
https://github.com/WebKit/WebKit/commit/c45540108d1deae5e94310fa66f8ea7b0287cfe2
Author: Ryan Reno <[email protected]>
Date: 2026-02-12 (Thu, 12 Feb 2026)
Changed paths:
M Source/WebKit/UIProcess/API/Cocoa/WKWebViewInternal.h
M Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm
M Source/WebKit/UIProcess/API/ios/WKWebViewPrivateForTestingIOS.h
M Source/WebKit/UIProcess/API/ios/WKWebViewTestingIOS.mm
M Tools/TestWebKitAPI/Tests/ios/WKScrollViewTests.mm
Log Message:
-----------
Throttle visible content rect updates when changing obscured insets
interactively.
https://bugs.webkit.org/show_bug.cgi?id=307463
rdar://156417823
Reviewed by Simon Fraser.
When changing obscured insets interactively we will get visible content rect
updates every frame.
We update bookkeeping, scrolling tree state, trigger rendering update and tile
painting,
as well as firing resize and viewport events. These things all add up to be
expensive in terms
of power use. By throttling these updates we can save significant power, up to
2% as measured by
an iOS browsing power benchmark on iPhones.
* Source/WebKit/UIProcess/API/Cocoa/WKWebViewInternal.h:
* Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm:
(-[WKWebView _scheduleForcedVisibleContentRectUpdate]):
(-[WKWebView _cancelPendingVisibleContentRectUpdateTimer]):
(-[WKWebView _scheduleVisibleContentRectUpdateWithDelay:]):
(-[WKWebView _updateVisibleContentRects]):
(-[WKWebView _endInteractiveObscuredInsetsChange]):
* Source/WebKit/UIProcess/API/ios/WKWebViewPrivateForTestingIOS.h:
* Source/WebKit/UIProcess/API/ios/WKWebViewTestingIOS.mm:
(-[WKWebView _hasPendingVisibleContentRectUpdateTimerForTesting]):
* Tools/TestWebKitAPI/Tests/ios/WKScrollViewTests.mm:
(TestWebKitAPI::TEST(WKScrollViewTests,
VisibleContentRectUpdatesDuringInteractiveObscuredInsetsChangeAreThrottled)):
(TestWebKitAPI::TEST(WKScrollViewTests,
ThrottledVisibleContentRectUpdateTimerCancelledWhenEndingInteractiveUpdates)):
(TestWebKitAPI::TEST(WKScrollViewTests,
ForcedVisibleContentRectUpdateCancelsPendingThrottleTimer)):
Canonical link: https://commits.webkit.org/307417@main
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