www.coursera.org

www.coursera.org based on real-user data from Chrome UX Report

All

Mobile

Desktop

Tablet

Web Vitals

Percentiles Distributions

Time to First Byte
Time to First Byte (TTFB) is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→
i

2.4s

Good <= 0.8s

12.2%

Moderate

40.3%

Poor > 1.8s

47.5%

First Contentful Paint
First Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→
i

3.3s

Good <= 1.8s

32.1%

Moderate

36.8%

Poor > 3.0s

31.2%

Largest Contentful PaintCWV
Largest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→
i

4.6s

Good <= 2.5s

45.4%

Moderate

24.1%

Poor > 4.0s

30.5%

Cumulative Layout ShiftCWV
Cumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→
i

0.2

Good <= 0.1

67.4%

Moderate

7.9%

Poor > 0.25

24.7%

First Input DelayCWV
First Input Delay (FID)Core Web Vital quantifies the experience users feel when trying to interact with unresponsive pages. A fast FID indicates that the page is usable.Learn more at web.dev/fid/→
i

0ms

Good <= 100ms

88.5%

Moderate

4.8%

Poor > 300ms

6.7%

Interaction to Next PaintExp
Interaction to Next Paint (INP)Experimental measures interaction latency. It captures the full event time, from initial input until the next frame is painted and event handlers have run. For pages with many interactions, it uses the maximum duration with some approximations.Learn more at web.dev/responsiveness/→
i

300ms

Good <= 200ms

63%

Moderate

20.7%

Poor > 500ms

16.4%

Past 28-days

Time to First Byte
Time to First Byte (TTFB) is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→
i

2.5s

Good <= 0.8s

–%

Moderate

–%

Poor > 1.8s

–%

First Contentful Paint
First Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→
i

3.4s

Good <= 1.8s

–%

Moderate

–%

Poor > 3.0s

–%

Largest Contentful PaintCWV
Largest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→
i

4.7s

Good <= 2.5s

–%

Moderate

–%

Poor > 4.0s

–%

Cumulative Layout ShiftCWV
Cumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→
i

0.25

Good <= 0.1

–%

Moderate

–%

Poor > 0.25

–%

First Input DelayCWV
First Input Delay (FID)Core Web Vital quantifies the experience users feel when trying to interact with unresponsive pages. A fast FID indicates that the page is usable.Learn more at web.dev/fid/→
i

14ms

Good <= 100ms

–%

Moderate

–%

Poor > 300ms

–%

Interaction to Next PaintExp
Interaction to Next Paint (INP)Experimental measures interaction latency. It captures the full event time, from initial input until the next frame is painted and event handlers have run. For pages with many interactions, it uses the maximum duration with some approximations.Learn more at web.dev/responsiveness/→
i

331ms

Good <= 200ms

–%

Moderate

–%

Poor > 500ms

–%

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Geography

Form Factors

Mobile

34%

Desktop

66%

Connections

4G+

87%

13%

Popularity Rank

Top 5,000

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www.coursera.org

Site speed audit for https://www.coursera.org based on real-user data from Chrome UX Report

Web Vitals

Time to First ByteTime to First Byte (TTFB) is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→i

First Contentful PaintFirst Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→i

Largest Contentful PaintCWVLargest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→i

Cumulative Layout ShiftCWVCumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→i

First Input DelayCWVFirst Input Delay (FID)Core Web Vital quantifies the experience users feel when trying to interact with unresponsive pages. A fast FID indicates that the page is usable.Learn more at web.dev/fid/→i

Past 28-days

Time to First ByteTime to First Byte (TTFB) is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→i

First Contentful PaintFirst Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→i

Largest Contentful PaintCWVLargest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→i

Cumulative Layout ShiftCWVCumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→i

First Input DelayCWVFirst Input Delay (FID)Core Web Vital quantifies the experience users feel when trying to interact with unresponsive pages. A fast FID indicates that the page is usable.Learn more at web.dev/fid/→i

Geography

Form Factors

Connections

Popularity Rank

If you want to optimize your site's speed, give Treo a try

Time to First Byte
Time to First Byte (TTFB) is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→
i

First Contentful Paint
First Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→
i

Largest Contentful PaintCWV
Largest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→
i

Cumulative Layout ShiftCWV
Cumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→
i

First Input DelayCWV
First Input Delay (FID)Core Web Vital quantifies the experience users feel when trying to interact with unresponsive pages. A fast FID indicates that the page is usable.Learn more at web.dev/fid/→
i

Time to First Byte
Time to First Byte (TTFB) is the time it takes to receive the first byte from the server. A fast TTFB indicates that the server responses quickly.Learn more at web.dev/ttfb/→
i

First Contentful Paint
First Contentful Paint (FCP) marks the time when the user can see anything on the screen. A fast FCP helps reassure the user that something is happening.Learn more at web.dev/fcp/→
i

Largest Contentful PaintCWV
Largest Contentful Paint (LCP)Core Web Vital marks the time when the page's main content has likely loaded. A fast LCP helps reassure the user that the page is useful.Learn more at web.dev/lcp/→
i

Cumulative Layout ShiftCWV
Cumulative Layout Shift (CLS)Core Web Vital quantifies how often users experience unexpected layout shifts. A fast CLS indicates that the page is delightful.Learn more at web.dev/cls/→
i

First Input DelayCWV
First Input Delay (FID)Core Web Vital quantifies the experience users feel when trying to interact with unresponsive pages. A fast FID indicates that the page is usable.Learn more at web.dev/fid/→
i