Report Summary

  • 96

    Performance

    Renders faster than
    94% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

razeni.idos.cz

IDOS - Řazení vlaků osobní přepravy

Page Load Speed

2 sec in total

First Response

639 ms

Resources Loaded

1.3 sec

Page Rendered

104 ms

razeni.idos.cz screenshot

About Website

Visit razeni.idos.cz now to see the best up-to-date Razeni IDOS content for Czech Republic and also check out these interesting facts you probably never knew about razeni.idos.cz

Řazení vlaků ČD

Visit razeni.idos.cz

Key Findings

We analyzed Razeni.idos.cz page load time and found that the first response time was 639 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

razeni.idos.cz performance score

96

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

85/100

10%

LCP (Largest Contentful Paint)

Value2.0 s

96/100

25%

SI (Speed Index)

Value3.3 s

91/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.2 s

94/100

10%

Network Requests Diagram

razeni.idos.cz

639 ms

IdosResource.ashx

109 ms

IdosResource.ashx

211 ms

IdosResource.ashx

213 ms

IdosResource.ashx

215 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that all of those requests were addressed to Razeni.idos.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (639 ms) belongs to the original domain Razeni.idos.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 122.1 kB (67%)

Content Size

181.7 kB

After Optimization

59.6 kB

In fact, the total size of Razeni.idos.cz main page is 181.7 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. 15% of websites need less resources to load. Javascripts take 141.6 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 7.7 kB

  • Original 10.9 kB
  • After minification 9.8 kB
  • After compression 3.2 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 7.7 kB or 71% of the original size.

Image Optimization

-12%

Potential reduce by 1.3 kB

  • Original 10.9 kB
  • After minification 9.6 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, Razeni IDOS needs image optimization as it can save up to 1.3 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-71%

Potential reduce by 100.1 kB

  • Original 141.6 kB
  • After minification 140.8 kB
  • After compression 41.6 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 100.1 kB or 71% of the original size.

CSS Optimization

-71%

Potential reduce by 13.0 kB

  • Original 18.3 kB
  • After minification 17.9 kB
  • After compression 5.2 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. Razeni.idos.cz needs all CSS files to be minified and compressed as it can save up to 13.0 kB or 71% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (74%)

Requests Now

27

After Optimization

7

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Razeni IDOS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

razeni.idos.cz accessibility score

92

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

razeni.idos.cz best practices score

67

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

razeni.idos.cz SEO score

62

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

High

Page is blocked from indexing

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Razeni.idos.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 Razeni.idos.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 Razeni IDOS. 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: