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89
groupon.com
Last Updated: 3 months
Success
62% of passed verification steps
Warning
23% of total warning
Errors
15% of total errors, require fast action
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Desktop
Mobile
Performance
Desktop Score 55%
Best Practices
Desktop Score 86%
SEO
Desktop Score 83%
PWA
Desktop Score 71%
Performance
Mobile Score 29%
Best Practices
Mobile Score 82%
SEO
Mobile Score 85%
PWA
Mobile Score 88%
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Social Data
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Estimation Traffic and Earnings
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Desktop
Largest Contentful Paint element
1,680 ms
This is the largest contentful element painted within the viewport
Minify JavaScript
Potential savings of 13 KiB
Minifying JavaScript files can reduce payload sizes and script parse time
Speed Index
4.3 s
Speed Index shows how quickly the contents of a page are visibly populated
Server Backend Latencies
250 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Cumulative Layout Shift
0.069
Cumulative Layout Shift measures the movement of visible elements within the viewport
Avoid long main-thread tasks
17 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Avoid serving legacy JavaScript to modern browsers
Potential savings of 63 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers
Enable text compression
Potential savings of 689 KiB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Reduce unused CSS
Potential savings of 66 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
Avoid chaining critical requests
3 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Time to Interactive
8.1 s
Time to Interactive is the amount of time it takes for the page to become fully interactive
Links do not have descriptive text
1 link found
Descriptive link text helps search engines understand your content
Serve static assets with an efficient cache policy
81 resources found
A long cache lifetime can speed up repeat visits to your page
Total Blocking Time
690 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Max Potential First Input Delay
370 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Minimize main-thread work
5.3 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint
1.2 s
First Contentful Paint marks the time at which the first text or image is painted
Network Round Trip Times
180 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Reduce the impact of third-party code
Third-party code blocked the main thread for 930 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Defer offscreen images
Potential savings of 185 KiB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
First Meaningful Paint
2.7 s
First Meaningful Paint measures when the primary content of a page is visible
Properly size images
Potential savings of 37 KiB
Serve images that are appropriately-sized to save cellular data and improve load time
Reduce unused JavaScript
Potential savings of 453 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
User Timing marks and measures
14 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Avoid non-composited animations
24 animated elements found
Animations which are not composited can be janky and increase CLS
Reduce initial server response time
Root document took 1,470 ms
Keep the server response time for the main document short because all other requests depend on it
Avoid multiple page redirects
Potential savings of 230 ms
Redirects introduce additional delays before the page can be loaded
Avoid large layout shifts
5 elements found
These DOM elements contribute most to the CLS of the page
Largest Contentful Paint
1.7 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Avoid an excessive DOM size
3,466 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Avoid enormous network payloads
Total size was 3,595 KiB
Large network payloads cost users real money and are highly correlated with long load times
Reduce JavaScript execution time
3.4 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Mobile
Max Potential First Input Delay
1,720 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Avoid multiple page redirects
Potential savings of 780 ms
Redirects introduce additional delays before the page can be loaded
Avoid enormous network payloads
Total size was 3,391 KiB
Large network payloads cost users real money and are highly correlated with long load times
Tap targets are not sized appropriately
95% appropriately sized tap targets
Interactive elements like buttons and links should be large enough (48x48px), or have enough space around them, to be easy enough to tap without overlapping onto other elements
First Contentful Paint
3.6 s
First Contentful Paint marks the time at which the first text or image is painted
Reduce initial server response time
Root document took 1,640 ms
Keep the server response time for the main document short because all other requests depend on it
Reduce JavaScript execution time
20.8 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Reduce unused CSS
Potential savings of 69 KiB
Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity
First Meaningful Paint
8.3 s
First Meaningful Paint measures when the primary content of a page is visible
Largest Contentful Paint
7.3 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Avoid serving legacy JavaScript to modern browsers
Potential savings of 63 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers
Enable text compression
Potential savings of 681 KiB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Document uses legible font sizes
99.99% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px
Defer offscreen images
Potential savings of 269 KiB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
Avoid non-composited animations
17 animated elements found
Animations which are not composited can be janky and increase CLS
Time to Interactive
27.6 s
Time to Interactive is the amount of time it takes for the page to become fully interactive
Total Blocking Time
10,710 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Avoid chaining critical requests
2 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Speed Index
14.9 s
Speed Index shows how quickly the contents of a page are visibly populated
Network Round Trip Times
120 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Serve static assets with an efficient cache policy
70 resources found
A long cache lifetime can speed up repeat visits to your page
Server Backend Latencies
240 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Preload Largest Contentful Paint image
Potential savings of 250 ms
If the LCP element is dynamically added to the page, you should preload the image in order to improve LCP
Minify JavaScript
Potential savings of 12 KiB
Minifying JavaScript files can reduce payload sizes and script parse time
Minimize main-thread work
26.8 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Avoid long main-thread tasks
20 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Reduce the impact of third-party code
Third-party code blocked the main thread for 9,750 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Reduce unused JavaScript
Potential savings of 384 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
User Timing marks and measures
36 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Largest Contentful Paint element
7,330 ms
This is the largest contentful element painted within the viewport
Avoid an excessive DOM size
2,649 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Speed And Optimization Tips
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Alexa Rank
99,999,999
Global Rank
99,999,999
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