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Web Frameworks

14 kotlinlang.org Last Updated: 11 months

Success 47% of passed verification steps
Warning 23% of total warning
Errors 30% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 76%
Best Practices Desktop Score 77%
SEO Desktop Score 78%
Progressive Web App Desktop Score 23%
Performance Mobile Score 16%
Best Practices Mobile Score 77%
SEO Mobile Score 64%
Progressive Web App Mobile Score 22%
Page Authority Authority 0%
Domain Authority Domain Authority 0%
Moz Rank 0.0/10
Bounce Rate Rate 0%
Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 27 Characters
KOTLIN PROGRAMMING LANGUAGE
Meta Description 0 Characters
NO DATA
Effective URL 22 Characters
https://kotlinlang.org
Excerpt Page content
Kotlin Programming Language Kotlin Learn Community ...
Keywords Cloud Density
kotlin21 string7 android6 code5 hello5 name4 println4 example4 browser4 language4
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
kotlin 21
string 7
android 6
code 5
hello 5
name 4
println 4
example 4
browser 4
language 4
Google Preview Your look like this in google search result
KOTLIN PROGRAMMING LANGUAGE
https://kotlinlang.org
Kotlin Programming Language Kotlin Learn Community ...
Robots.txt File No Found
Sitemap.xml File Detected
Page Size Code & Text Ratio
Document Size: ~26.3 KB
Code Size: ~15.38 KB
Text Size: ~10.92 KB Ratio: 41.54%

Estimation Traffic and Earnings

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Desktop

Desktop Screenshot
Total Blocking Time 100 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 1.0 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Server Backend Latencies 0 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
Defer offscreen images Potential savings of 61 KB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
Properly size images Potential savings of 1,009 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 1.6 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 2.2 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).
Avoids enormous network payloads Total size was 2,679 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimizes main-thread work 1.5 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 1.4 s
First Contentful Paint marks the time at which the first text or image is painted
Avoid chaining critical requests 10 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
Avoids an excessive DOM size 491 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)
Minify JavaScript Potential savings of 8 KB
Minifying JavaScript files can reduce payload sizes and script parse time
First Meaningful Paint 1.6 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 56 requests • 2,679 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 19 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 110 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 2.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Network Round Trip Times 0 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
Page load is not fast enough on mobile networks Interactive on simulated mobile network at 14.1 s
A fast page load over a cellular network ensures a good mobile user experience
Estimated Input Latency 10 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Remove unused CSS Potential savings of 83 KB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Serve images in next-gen formats Potential savings of 1,311 KB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
User Timing marks and measures 3 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Server response times are low (TTFB) Root document took 110 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 40 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Reduce the impact of third-party code Third-party code blocked the main thread for 250 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

Mobile

Mobile Screenshot
Total Blocking Time 670 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Reduce JavaScript execution time 3.3 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Server Backend Latencies 0 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
Speed Index 7.7 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 10.4 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).
Avoid enormous network payloads Total size was 2,737 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimize main-thread work 5.2 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 6.3 s
First Contentful Paint marks the time at which the first text or image is painted
Avoid chaining critical requests 10 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
Avoids an excessive DOM size 482 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)
Minify JavaScript Potential savings of 8 KB
Minifying JavaScript files can reduce payload sizes and script parse time
First Meaningful Paint 7.5 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 56 requests • 2,737 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 20 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 340 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 13.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Network Round Trip Times 0 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
Page load is not fast enough on mobile networks Interactive at 13.9 s
A fast page load over a cellular network ensures a good mobile user experience
First Contentful Paint (3G) 13680 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Estimated Input Latency 130 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Remove unused CSS Potential savings of 78 KB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Serve images in next-gen formats Potential savings of 1,333 KB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
User Timing marks and measures 3 user timings
Consider instrumenting your app with the User Timing API to measure your app's real-world performance during key user experiences
Server response times are low (TTFB) Root document took 60 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 0 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Reduce the impact of third-party code Third-party code blocked the main thread for 1,690 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

Speed And Optimization Tips

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Alexa Rank

0

Local Rank: / Users: / PageViews:

Global Rank

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/1.1 200 OK
Content-Type: text/html
Connection: keep-alive
Last-Modified: Wed, 11 Dec 2019 14:05:50 GMT
Server: AmazonS3
Content-Encoding: gzip
Date: Wed, 25 Dec 2019 10:21:44 GMT
Vary: Accept-Encoding
X-Cache: Hit from cloudfront
Via: 1.1 29bea082286af4a231cfc553e1b23886.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: IAD79-C3
X-Amz-Cf-Id: 6BqMlbWlBC2VTdiL6xqfc9JeP1fYVOJKGdEIghp0PjP61uPSjGcZsw==
DNS Records DNS Resource Records associated with a hostname
View DNS Records

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