Tools & Wizards About Us

Report Summary

  • 28

    Performance

    Renders faster than
    48% of other websites

  • 36

    Accessibility

    Visual factors better than
    that of 18% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

sunlab.cz

SUNLAB.CZ - Electronic music project

Page Load Speed

4.6 sec in total

First Response

396 ms

Resources Loaded

3.9 sec

Page Rendered

233 ms

About Website

Visit sunlab.cz now to see the best up-to-date SUNLAB content and also check out these interesting facts you probably never knew about sunlab.cz

SUNLAB je parta nadšenců, které spojuje elektronická muzika.

Visit sunlab.cz

Key Findings

We analyzed Sunlab.cz page load time and found that the first response time was 396 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

sunlab.cz performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

24/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

50/100

25%

SI (Speed Index)

Value14.0 s

1/100

10%

TBT (Total Blocking Time)

Value5,880 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.106

88/100

15%

TTI (Time to Interactive)

Value24.8 s

0/100

10%

Network Requests Diagram

sunlab.cz

396 ms

main.css

323 ms

jquery-1.4.2.min.js

6 ms

coin-slider.min.js

341 ms

coin-slider-styles.css

319 ms

Our browser made a total of 148 requests to load all elements on the main page. We found that 46% of them (68 requests) were addressed to the original Sunlab.cz, 9% (13 requests) were made to Ssl.google-analytics.com and 6% (9 requests) were made to W.soundcloud.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Sunlab.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (45%)

Content Size

2.5 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sunlab.cz main page is 2.5 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 873.7 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 65.3 kB

  • Original 79.4 kB
  • After minification 76.4 kB
  • After compression 14.1 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 65.3 kB or 82% of the original size.

Image Optimization

-10%

Potential reduce by 84.5 kB

  • Original 856.9 kB
  • After minification 772.4 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. SUNLAB images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 542.7 kB

  • Original 873.7 kB
  • After minification 854.4 kB
  • After compression 331.1 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 542.7 kB or 62% of the original size.

CSS Optimization

-62%

Potential reduce by 423.5 kB

  • Original 688.6 kB
  • After minification 680.0 kB
  • After compression 265.0 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. Sunlab.cz needs all CSS files to be minified and compressed as it can save up to 423.5 kB or 62% of the original size.

Requests Breakdown

Number of requests can be reduced by 73 (52%)

Requests Now

141

After Optimization

68

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 141 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SUNLAB. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

sunlab.cz accessibility score

36

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

sunlab.cz best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

sunlab.cz SEO score

77

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

Content Best Practices

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

Impact

Issue

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sunlab.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech 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 Sunlab.cz main page’s claimed encoding is windows-1250. 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

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