Tools & Wizards About Us
stacklab.org screenshot

Report Summary

  • 80

    Performance

    Renders faster than
    86% 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

  • 92

    SEO

    Google-friendlier than
    75% of websites

stacklab.org

Page Load Speed

31.3 sec in total

First Response

15.4 sec

Resources Loaded

15.8 sec

Page Rendered

81 ms

stacklab.org screenshot

About Website

Click here to check amazing Stacklab content. Otherwise, check out these important facts you probably never knew about stacklab.org

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Key Findings

We analyzed Stacklab.org page load time and found that the first response time was 15.4 sec and then it took 15.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster. This domain responded with an error, which can significantly jeopardize Stacklab.org rating and web reputation

Performance Metrics

stacklab.org performance score

80

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

59/100

25%

SI (Speed Index)

Value3.3 s

91/100

10%

TBT (Total Blocking Time)

Value140 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.032

100/100

15%

TTI (Time to Interactive)

Value4.0 s

87/100

10%

Network Requests Diagram

stacklab.org

15393 ms

_Incapsula_Resource

145 ms

_Incapsula_Resource

79 ms

_Incapsula_Resource

150 ms

err.html

158 ms

Our browser made a total of 7 requests to load all elements on the main page. We found that 57% of them (4 requests) were addressed to the original Stacklab.org, 29% (2 requests) were made to Content.incapsula.com and 14% (1 request) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (15.4 sec) belongs to the original domain Stacklab.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 7.3 kB (27%)

Content Size

26.6 kB

After Optimization

19.4 kB

  • HTML
  • JavaScript

In fact, the total size of Stacklab.org main page is 26.6 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. Javascripts take 25.8 kB which makes up the majority of the site volume.

HTML Optimization

-39%

Potential reduce by 310 B

  • Original 796 B
  • After minification 796 B
  • After compression 486 B

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 310 B or 39% of the original size.

JavaScript Optimization

-27%

Potential reduce by 7.0 kB

  • Original 25.8 kB
  • After minification 25.8 kB
  • After compression 18.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 7.0 kB or 27% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

  • AJAX
  • JavaScript

The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Stacklab. According to our analytics all requests are already optimized.

Network Requests Diagram

stacklab.org

stacklab.org

15393 ms

_Incapsula_Resource

_Incapsula_Resource

145 ms

_Incapsula_Resource

_Incapsula_Resource

79 ms

_Incapsula_Resource

_Incapsula_Resource

150 ms

err.html

err.html

158 ms

err.html

err.html

154 ms

ga.js

ga.js

5 ms

Accessibility Review

stacklab.org accessibility score

86

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.

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

<frame> or <iframe> elements do not have a title

Best Practices

stacklab.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

SEO Factors

stacklab.org SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

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

    N/A

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Stacklab.org can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Stacklab.org main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

stacklab.org

Open Graph description is not detected on the main page of Stacklab. 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: