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try.dartlang.org screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 62% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

try.dartlang.org

DartPad

Page Load Speed

1.2 sec in total

First Response

178 ms

Resources Loaded

920 ms

Page Rendered

99 ms

try.dartlang.org screenshot

About Website

Click here to check amazing Try Dart Lang content for Uzbekistan. Otherwise, check out these important facts you probably never knew about try.dartlang.org

Visit try.dartlang.org

Key Findings

We analyzed Try.dartlang.org page load time and found that the first response time was 178 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

try.dartlang.org performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

48/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value5.3 s

59/100

10%

TBT (Total Blocking Time)

Value1,380 ms

16/100

30%

CLS (Cumulative Layout Shift)

Value0.531

14/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

Network Requests Diagram

dartpad.dartlang.org

178 ms

css

57 ms

css

69 ms

codemirror.js

84 ms

main.dart.js

169 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Try.dartlang.org, 20% (3 requests) were made to Google-analytics.com and 20% (3 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (304 ms) relates to the external source Dartpad.dartlang.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 35.3 kB (37%)

Content Size

95.0 kB

After Optimization

59.7 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Try.dartlang.org main page is 95.0 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. HTML takes 46.6 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 35.2 kB

  • Original 46.6 kB
  • After minification 45.8 kB
  • After compression 11.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 35.2 kB or 76% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 27.5 kB
  • After minification 27.5 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Try Dart Lang images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

Requests Breakdown

We found no issues to fix!

Requests Now

10

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Try Dart Lang. According to our analytics all requests are already optimized.

Network Requests Diagram

dartpad.dartlang.org

dartpad.dartlang.org

178 ms

css

css

57 ms

css

css

69 ms

codemirror.js

codemirror.js

84 ms

main.dart.js

main.dart.js

169 ms

analytics.js

analytics.js

56 ms

frame.html

frame.html

71 ms

keyboard.svg

keyboard.svg

304 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

68 ms

collect

collect

15 ms

collect

collect

234 ms

embed-dart.png

embed-dart.png

110 ms

collect

collect

32 ms

BjAYBlHtW3CJxDcjzrnZCJ0EAVxt0G0biEntp43Qt6E.ttf

BjAYBlHtW3CJxDcjzrnZCJ0EAVxt0G0biEntp43Qt6E.ttf

23 ms

AIed271kqQlcIRSOnQH0yZ_TkvowlIOtbR7ePgFOpF4.ttf

AIed271kqQlcIRSOnQH0yZ_TkvowlIOtbR7ePgFOpF4.ttf

27 ms

Accessibility Review

try.dartlang.org accessibility score

86

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

try.dartlang.org best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Missing source maps for large first-party JavaScript

SEO Factors

try.dartlang.org SEO score

82

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Try.dartlang.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Try.dartlang.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

try.dartlang.org

Open Graph description is not detected on the main page of Try Dart Lang. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: