1.2 sec in total
441 ms
651 ms
93 ms
Click here to check amazing RS Online content for Czech Republic. Otherwise, check out these important facts you probably never knew about rs-online.cz
Neomezený rezervační systém vhodný ve sportu, zdravotnictví i službách. Žádná administrativa, mějte podnikání vždy u sebe
Visit rs-online.czWe analyzed Rs-online.cz page load time and found that the first response time was 441 ms and then it took 744 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.
rs-online.cz performance score
name
value
score
weighting
Value4.4 s
17/100
10%
Value6.1 s
12/100
25%
Value7.2 s
29/100
10%
Value150 ms
94/100
30%
Value0.013
100/100
15%
Value8.8 s
36/100
10%
441 ms
11 ms
39 ms
70 ms
24 ms
Our browser made a total of 6 requests to load all elements on the main page. We found that 17% of them (1 request) were addressed to the original Rs-online.cz, 50% (3 requests) were made to Pagead2.googlesyndication.com and 33% (2 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (441 ms) belongs to the original domain Rs-online.cz.
Page size can be reduced by 1.3 kB (8%)
16.5 kB
15.2 kB
In fact, the total size of Rs-online.cz main page is 16.5 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 14.5 kB which makes up the majority of the site volume.
Potential reduce by 1.2 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 1.2 kB or 59% of the original size.
Potential reduce by 109 B
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. This website has mostly compressed JavaScripts.
We found no issues to fix!
5
5
The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of RS Online. According to our analytics all requests are already optimized.
rs-online.cz
441 ms
show_ads.js
11 ms
zrt_lookup.html
39 ms
show_ads_impl.js
70 ms
ads
24 ms
osd.js
34 ms
rs-online.cz accessibility score
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
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
rs-online.cz best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
rs-online.cz SEO score
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
Document uses legible font sizes
CS
N/A
N/A
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rs-online.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 Rs-online.cz 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.
rs-online.cz
Open Graph description is not detected on the main page of RS Online. 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: