Largest Contentful Paint Changelog

This is a list of changes to Largest Contentful Paint.

Chrome 153
- Metric bug fix: Fixed race conditions in presentation timestamp attribution for animated images and first video frames (8178904, 8177704).
Chrome 151
- Launch feature: Prompt LCP entry emission for video elements (RequestMainFrameAfterFirstVideoFrame)
- Metric bug fix: Prevent premature garbage collection of VideoTiming metadata to ensure video LCP entries are accurately reported (7911270).
Chrome 147
- Metric definition improvement: Emit LCP candidates based on largest painted image instead of largest pending image
Chrome 145
- Launch feature: Shipped PaintTimingMixin exposing standard paint timing properties across entry types (7224616).
Chrome 144
- Metric bug fix: Corrected LCP and FCP handling when document opacity changes from zero to non-zero (7137609, 7164696).
Chrome 143
- Metric bug fix: Fixed text presentation timestamps reporting too early, impacting LCP (introduced in M140)
Chrome 140
- Bug: Text presentation timestamps reporting too early, impacting LCP
Chrome 133
- Implementation optimizations: Expose coarsened cross-origin renderTime in element timing/LCP (regardless of TAO)
Chrome 130
- Launch feature: Exclude transparent text from being LCP eligible
Chrome 126
- Launch feature: Enable NewPresentationFeedbackTimeStamps on Mac to improve the accuracy of the frame display time
Chrome 118
- Implementation optimizations: Image loading prioritizations
Chrome 117
- Bug: Spurious LCP entries after user interaction
Chrome 116
- Metric definition improvement: Changes to how LCP handles videos and animated images
- Implementation optimizations: Optimizing image load scheduling
Chrome 112
- Metric definition improvement: Largest Contentful Paint ignores low-entropy images
Chrome 111
- Implementation optimizations: Changes related to LCP, FCP and Paint Holding
Chrome 99
- Implementation optimizations: Navigation optimizations and timeOrigin changes
Chrome 98
- Metric bug fix: Text paints are more accurate
Chrome 96
- Metric bug fix: Largest Contentful Paint uses the page viewport
Chrome 88
- Metric definition improvement: Largest Contentful Paint ignores full viewport images
- Metric definition improvement: Largest Contentful Paint stops recording after input in an iframe
- Metric definition improvement: Largest Contentful Paint bug fix for some images with source changes
- Metric definition improvement: Largest Contentful Paint ignores removed content by default
Chrome 86
- Metric definition improvement: Largest Contentful Paint ignores paints with opacity 0
Chrome 83
- Metric definition improvement: Largest Contentful Paint measurement stops at first input or scroll
- Metric definition improvement: Largest Contentful Paint properly accounts for visual size of background images
Chrome 81
- Metric definition improvement: Largest Text Paint correctly reported while largest image is loading
Chrome 79
- Metric is elevated to stable; changes in metric definition will be reported in this log.
Chrome 77
- Experimental metric exposed via API: Largest Contentful Paint available via PerformanceObserver API