Report Summary

  • 73

    Performance

    Renders faster than
    83% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

rollerblade.cz

RollerBlade

Page Load Speed

4.2 sec in total

First Response

382 ms

Resources Loaded

3.5 sec

Page Rendered

275 ms

rollerblade.cz screenshot

About Website

Click here to check amazing Roller Blade content for Czech Republic. Otherwise, check out these important facts you probably never knew about rollerblade.cz

Kolekce kolečkové brusle rollerblade bladerunner výhradní dovozce

Visit rollerblade.cz

Key Findings

We analyzed Rollerblade.cz page load time and found that the first response time was 382 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

rollerblade.cz performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

49/100

25%

SI (Speed Index)

Value7.5 s

26/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value4.1 s

86/100

10%

Network Requests Diagram

rollerblade.cz

382 ms

www.rollerblade.cz

716 ms

template.css

448 ms

template.js

696 ms

home.js

232 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 79% of them (31 requests) were addressed to the original Rollerblade.cz, 13% (5 requests) were made to Heliatrade.cz and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Rollerblade.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 187.6 kB (15%)

Content Size

1.2 MB

After Optimization

1.0 MB

In fact, the total size of Rollerblade.cz main page is 1.2 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. 25% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 9.8 kB

  • Original 13.1 kB
  • After minification 10.4 kB
  • After compression 3.3 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. This page needs HTML code to be minified as it can gain 2.7 kB, which is 20% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 9.8 kB or 75% of the original size.

Image Optimization

-5%

Potential reduce by 50.9 kB

  • Original 1.0 MB
  • After minification 964.3 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. Roller Blade images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 89.9 kB

  • Original 152.8 kB
  • After minification 152.3 kB
  • After compression 62.8 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 89.9 kB or 59% of the original size.

CSS Optimization

-85%

Potential reduce by 37.0 kB

  • Original 43.7 kB
  • After minification 33.5 kB
  • After compression 6.7 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. Rollerblade.cz needs all CSS files to be minified and compressed as it can save up to 37.0 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (24%)

Requests Now

37

After Optimization

28

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Roller Blade. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Review

rollerblade.cz accessibility score

95

Accessibility Issues

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

Links do not have a discernible name

Best Practices

rollerblade.cz best practices score

75

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

SEO Factors

rollerblade.cz SEO score

67

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

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rollerblade.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Rollerblade.cz 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 description is not detected on the main page of Roller Blade. 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: