Report:CrUX
Loading and interactivity performance as experienced by real-world Chrome users across a diverse set of hardware and network conditions, powered by the Chrome User Experience Report.
- Good Core Web Vitals
- Good First Contentful Paint
- Poor First Contentful Paint
- Good Largest Contentful Paint
- Poor Largest Contentful Paint
- Good Cumulative Layout Shift
- Poor Cumulative Layout Shift
- Good Interaction to Next Paint
- Poor Interaction to Next Paint
- Good Time to First Byte
- Poor Time to First Byte
- Good First Paint
- Good DOM Content Loaded
- Good Onload
- First Contentful Paint
- Largest Contentful Paint
- Cumulative Layout Shift
- Interaction to Next Paint
- Time to First Byte
- First Paint
- DOMContentLoaded
- Onload
Good Core Web Vitals
The percentage of origins passing all three Core Web Vitals (LCP, INP, CLS) with a "good" experience. Note that if an origin is missing INP data, it's assessed based on the performance of the remaining metrics. Also note that prior to March 2024, this metric used FID instead of INP.
Good First Contentful Paint
The percentage of origins with "good" FCP experiences, less than or equal to 1.8 seconds.
Poor First Contentful Paint
The percentage of origins with "poor" FCP experiences, greater than 3 seconds.
Good Largest Contentful Paint
The percentage of origins with "good" LCP experiences, less than or equal to 2.5 seconds.
Poor Largest Contentful Paint
The percentage of origins with "poor" LCP experiences, greater than 4.0 seconds.
Good Cumulative Layout Shift
The percentage of origins with "good" CLS experiences, less and or equal to 0.1.
Poor Cumulative Layout Shift
The percentage of origins with "poor" CLS experiences, greater than 0.25.
Good Interaction to Next Paint
The percentage of origins with "good" INP experiences, less than or equal to 200 ms. See Interaction to Next Paint (INP).
Poor Interaction to Next Paint
The percentage of origins with "poor" INP experiences, greater than 500 ms. See Interaction to Next Paint (INP).
Good Time to First Byte
The percentage of origins with "good" TTFB experiences, less than or equal to 800ms. See Time to First Byte (TTFB).
Poor Time to First Byte
The percentage of origins with "poor" TTFB experiences, greater than 1800ms. See Time to First Byte (TTFB).
Good First Paint
The percentage of origins with "good" FP experiences, less than or equal to 1 second.
Good DOM Content Loaded
The percentage of origins with "good" DCL experiences, less than or equal to 1 second.
Good Onload
The percentage of origins with "good" OL experiences, less than or equal to 1 second.
First Contentful Paint
The number of seconds from the time the navigation started until the browser first renders. See the Paint Timing API for more info.
Largest Contentful Paint
The number of seconds from the time the navigation started until the browser first renders the largest image or text block visible within the viewport. See the LargestContentfulPaint API for more info.
Cumulative Layout Shift
The layout shift scores for every unexpected layout shift that occurs during the entire lifespan of the page. See the Cumulative Layout Shift (CLS) for more info.
Interaction to Next Paint
The number of milliseconds from the time the user initiates an interaction to the time the page responds. See Interaction to Next Paint (INP).
Time to First Byte
The number of milliseconds from the time the user initiates a navigation until the first bytes are received. See Time to First Byte (TTFB).
First Paint
The number of seconds from the time the navigation started until the browser first renders. See the Paint Timing API for more info.
DOMContentLoaded
The number of seconds from the time the navigation started until the browser first renders any text or graphics.
Onload
The number of seconds from the time the navigation started until the document and all of its dependent resources have finished loading.