4.6 sec in total
434 ms
3.8 sec
366 ms
Welcome to gjb-spgs.cz homepage info - get ready to check Gjb Spgs best content for Czech Republic right away, or after learning these important things about gjb-spgs.cz
Gymnázium Jana Blahoslava a Střední pedagogická škola
Visit gjb-spgs.czWe analyzed Gjb-spgs.cz page load time and found that the first response time was 434 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.
gjb-spgs.cz performance score
name
value
score
weighting
Value4.1 s
21/100
10%
Value12.3 s
0/100
25%
Value11.6 s
4/100
10%
Value170 ms
92/100
30%
Value0.069
96/100
15%
Value10.4 s
24/100
10%
434 ms
938 ms
283 ms
526 ms
281 ms
Our browser made a total of 72 requests to load all elements on the main page. We found that 97% of them (70 requests) were addressed to the original Gjb-spgs.cz, 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Gjb-spgs.cz.
Page size can be reduced by 199.5 kB (11%)
1.9 MB
1.7 MB
In fact, the total size of Gjb-spgs.cz main page is 1.9 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. 45% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.
Potential reduce by 25.9 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 25.9 kB or 76% of the original size.
Potential reduce by 66.3 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. Gjb Spgs images are well optimized though.
Potential reduce by 97.5 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 97.5 kB or 63% of the original size.
Potential reduce by 9.9 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. Gjb-spgs.cz needs all CSS files to be minified and compressed as it can save up to 9.9 kB or 75% of the original size.
Number of requests can be reduced by 24 (34%)
70
46
The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Gjb Spgs. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
gjb-spgs.cz
434 ms
www.gjb-spgs.cz
938 ms
ticker-style.css
283 ms
styles.css
526 ms
lightbox.css
281 ms
jquery-1.5.min.js
902 ms
jquery.cycle.min.js
655 ms
lightbox.js
660 ms
jquery.ticker.js
655 ms
script.js
746 ms
bg-main.gif
132 ms
bg-plocha.gif
130 ms
bg-plocha-top.gif
136 ms
pruh-bg-top.gif
142 ms
ico-oceneni.png
141 ms
mapa.jpg
262 ms
nic.gif
254 ms
pdf.gif
260 ms
jpg.gif
261 ms
obr.asp
299 ms
obr.asp
332 ms
obr.asp
421 ms
obr.asp
459 ms
logo.gif
435 ms
img1.png
554 ms
img2.png
686 ms
img3.png
712 ms
img4.png
931 ms
img5.png
690 ms
img6.png
838 ms
img7.png
839 ms
img8.png
977 ms
img9.png
914 ms
img10.png
995 ms
img11.png
1113 ms
img12.png
1123 ms
img13.png
1172 ms
img14.png
1193 ms
img15.png
1113 ms
img17.png
1129 ms
img18.png
1374 ms
img19.png
1249 ms
img20.png
1271 ms
img21.png
1269 ms
logo7.gif
1303 ms
logo1.gif
1314 ms
ga.js
6 ms
__utm.gif
12 ms
logo2-2015.gif
1260 ms
logo3-2015.gif
1280 ms
logo4-2015.gif
1272 ms
logo6-2015.gif
1314 ms
logo8-2015.gif
1319 ms
pruh-bg-bottom.gif
1254 ms
btn-bgx.gif
1256 ms
styles.css
1274 ms
datum.gif
1274 ms
li.gif
1281 ms
ukazat-na-mape.gif
1254 ms
col-r2-box-top.gif
1211 ms
col-r2-box-bottom.gif
1209 ms
box-top.gif
1203 ms
box-bottom.gif
1106 ms
menu-bg-top.gif
1019 ms
menu-li.gif
1020 ms
hlavicka-bg.jpg
1048 ms
topmenu-li.gif
931 ms
bg-loga.gif
946 ms
controls.png
876 ms
loading.gif
904 ms
closelabel.gif
859 ms
blank.gif
890 ms
gjb-spgs.cz accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
Links do not have a discernible name
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
gjb-spgs.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
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
gjb-spgs.cz SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Tap targets are not sized appropriately
CS
CS
WINDOWS-1250
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Gjb-spgs.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 Gjb-spgs.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.
gjb-spgs.cz
Open Graph description is not detected on the main page of Gjb Spgs. 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: