Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 58

    Accessibility

    Visual factors better than
    that of 25% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

rezervace.letuska.cz

Letenky Paříž | Letuška.cz

Page Load Speed

5.1 sec in total

First Response

870 ms

Resources Loaded

4.1 sec

Page Rendered

180 ms

rezervace.letuska.cz screenshot

About Website

Welcome to rezervace.letuska.cz homepage info - get ready to check Rezervace Letuska best content for Czech Republic right away, or after learning these important things about rezervace.letuska.cz

Visit rezervace.letuska.cz

Key Findings

We analyzed Rezervace.letuska.cz page load time and found that the first response time was 870 ms and then it took 4.3 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

rezervace.letuska.cz performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.5 s

2/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value9.7 s

10/100

10%

TBT (Total Blocking Time)

Value600 ms

49/100

30%

CLS (Cumulative Layout Shift)

Value0.081

94/100

15%

TTI (Time to Interactive)

Value10.7 s

22/100

10%

Network Requests Diagram

rezervace.letuska.cz

870 ms

index.php

466 ms

soyka-api.js

338 ms

lytebox.css

274 ms

global.css

486 ms

Our browser made a total of 66 requests to load all elements on the main page. We found that 62% of them (41 requests) were addressed to the original Rezervace.letuska.cz, 12% (8 requests) were made to Letuska.cz and 6% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Letuska.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 326.5 kB (67%)

Content Size

488.4 kB

After Optimization

161.9 kB

In fact, the total size of Rezervace.letuska.cz main page is 488.4 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. Javascripts take 354.6 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 39.6 kB

  • Original 49.7 kB
  • After minification 47.9 kB
  • After compression 10.2 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 39.6 kB or 80% of the original size.

Image Optimization

-26%

Potential reduce by 2.8 kB

  • Original 10.7 kB
  • After minification 7.9 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, Rezervace Letuska needs image optimization as it can save up to 2.8 kB or 26% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-62%

Potential reduce by 221.2 kB

  • Original 354.6 kB
  • After minification 354.6 kB
  • After compression 133.4 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 221.2 kB or 62% of the original size.

CSS Optimization

-86%

Potential reduce by 63.0 kB

  • Original 73.4 kB
  • After minification 73.3 kB
  • After compression 10.4 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. Rezervace.letuska.cz needs all CSS files to be minified and compressed as it can save up to 63.0 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 42 (75%)

Requests Now

56

After Optimization

14

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rezervace Letuska. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

rezervace.letuska.cz accessibility score

58

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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.

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

rezervace.letuska.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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

rezervace.letuska.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 uses legible font sizes

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 Rezervace.letuska.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 Rezervace.letuska.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 Rezervace Letuska. 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: