Tools & Wizards About Us

Report Summary

  • 83

    Performance

    Renders faster than
    87% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

deno.land

Deno, the next-generation JavaScript runtime

Page Load Speed

3.3 sec in total

First Response

112 ms

Resources Loaded

626 ms

Page Rendered

2.5 sec

About Website

Welcome to deno.land homepage info - get ready to check Deno best content for China right away, or after learning these important things about deno.land

Deno features improved security, performance, and developer experience compared to its predecessor. It's a great time to upgrade your Node.js project to run on Deno.

Visit deno.land

Key Findings

We analyzed Deno.land page load time and found that the first response time was 112 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

deno.land performance score

83

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

49/100

25%

SI (Speed Index)

Value2.7 s

97/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.066

97/100

15%

TTI (Time to Interactive)

Value2.5 s

98/100

10%

Network Requests Diagram

deno.com

112 ms

gtm.js

69 ms

inter.css

50 ms

app.css

103 ms

gfm.css

95 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Deno.land, 3% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (336 ms) relates to the external source Deno.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 157.7 kB (56%)

Content Size

280.3 kB

After Optimization

122.6 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Deno.land main page is 280.3 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. 40% of websites need less resources to load. HTML takes 179.2 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 144.6 kB

  • Original 179.2 kB
  • After minification 175.0 kB
  • After compression 34.5 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 144.6 kB or 81% of the original size.

Image Optimization

-12%

Potential reduce by 11.2 kB

  • Original 95.9 kB
  • After minification 84.7 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. Obviously, Deno needs image optimization as it can save up to 11.2 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-34%

Potential reduce by 1.8 kB

  • Original 5.2 kB
  • After minification 5.2 kB
  • After compression 3.4 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Deno.land needs all CSS files to be minified and compressed as it can save up to 1.8 kB or 34% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

38

After Optimization

38

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Deno. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

deno.land accessibility score

88

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

Best Practices

deno.land best practices score

83

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

Browser errors were logged to the console

SEO Factors

deno.land SEO score

85

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Deno.land can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Deno.land 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

Open Graph data is detected on the main page of Deno. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: