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portal.osu.cz screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

portal.osu.cz

Welcome

Page Load Speed

116.1 sec in total

First Response

780 ms

Resources Loaded

115.1 sec

Page Rendered

280 ms

portal.osu.cz screenshot

About Website

Visit portal.osu.cz now to see the best up-to-date Portal Osu content for Czech Republic and also check out these interesting facts you probably never knew about portal.osu.cz

Visit portal.osu.cz

Key Findings

We analyzed Portal.osu.cz page load time and found that the first response time was 780 ms and then it took 115.4 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 60 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

portal.osu.cz performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value24.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value25.1 s

0/100

25%

SI (Speed Index)

Value36.1 s

0/100

10%

TBT (Total Blocking Time)

Value4,610 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value32.6 s

0/100

10%

Network Requests Diagram

portal.osu.cz

780 ms

portal.osu.cz

712 ms

643 ms

mashup:ra:collection

434 ms

mashup:ra:collection

419 ms

Our browser made a total of 96 requests to load all elements on the main page. We found that all of those requests were addressed to Portal.osu.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (12.6 sec) belongs to the original domain Portal.osu.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 157.4 kB (82%)

Content Size

191.3 kB

After Optimization

33.9 kB

  • HTML
  • CSS

In fact, the total size of Portal.osu.cz main page is 191.3 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. 20% of websites need less resources to load. CSS take 151.7 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 30.9 kB

  • Original 39.5 kB
  • After minification 35.7 kB
  • After compression 8.7 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 30.9 kB or 78% of the original size.

CSS Optimization

-83%

Potential reduce by 126.5 kB

  • Original 151.7 kB
  • After minification 139.8 kB
  • After compression 25.2 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. Portal.osu.cz needs all CSS files to be minified and compressed as it can save up to 126.5 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (67%)

Requests Now

33

After Optimization

11

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Portal Osu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

portal.osu.cz

portal.osu.cz

780 ms

portal.osu.cz

portal.osu.cz

712 ms

643 ms

mashup:ra:collection

mashup:ra:collection

434 ms

mashup:ra:collection

mashup:ra:collection

419 ms

ra:collection

ra:collection

568 ms

tundra.css

tundra.css

0 ms

Styles7.2.css

Styles7.2.css

569 ms

FileInput.css

FileInput.css

408 ms

Grid.css

Grid.css

726 ms

tundraGrid.css

tundraGrid.css

864 ms

dojo.js

dojo.js

1175 ms

utils.js

utils.js

1019 ms

ra:collection

ra:collection

641 ms

ra:collection

ra:collection

758 ms

default.css

default.css

487 ms

contextmenuCommon.css

contextmenuCommon.css

601 ms

contextmenu.css

contextmenu.css

615 ms

Button.js

Button.js

0 ms

_FormWidget.js

_FormWidget.js

0 ms

_Widget.js

_Widget.js

0 ms

registry.js

registry.js

0 ms

main.js

main.js

0 ms

_WidgetBase.js

_WidgetBase.js

0 ms

Stateful.js

Stateful.js

0 ms

Destroyable.js

Destroyable.js

0 ms

_OnDijitClickMixin.js

_OnDijitClickMixin.js

0 ms

a11yclick.js

a11yclick.js

0 ms

touch.js

touch.js

0 ms

_FocusMixin.js

_FocusMixin.js

0 ms

focus.js

focus.js

0 ms

window.js

window.js

0 ms

a11y.js

a11y.js

0 ms

uacss.js

uacss.js

0 ms

hccss.js

hccss.js

0 ms

hccss.js

hccss.js

0 ms

_CssStateMixin.js

_CssStateMixin.js

0 ms

_TemplatedMixin.js

_TemplatedMixin.js

0 ms

cache.js

cache.js

0 ms

string.js

string.js

0 ms

_AttachMixin.js

_AttachMixin.js

0 ms

_FormWidgetMixin.js

_FormWidgetMixin.js

0 ms

_ButtonMixin.js

_ButtonMixin.js

0 ms

TextBox.js

TextBox.js

0 ms

_FormValueWidget.js

_FormValueWidget.js

0 ms

_FormValueMixin.js

_FormValueMixin.js

0 ms

_TextBoxMixin.js

_TextBoxMixin.js

0 ms

CheckBox.js

CheckBox.js

0 ms

ToggleButton.js

ToggleButton.js

0 ms

_ToggleButtonMixin.js

_ToggleButtonMixin.js

0 ms

_CheckBoxMixin.js

_CheckBoxMixin.js

0 ms

RadioButton.js

RadioButton.js

0 ms

_RadioButtonMixin.js

_RadioButtonMixin.js

0 ms

lite.js

lite.js

0 ms

Select.js

Select.js

0 ms

_FormSelectWidget.js

_FormSelectWidget.js

0 ms

sorter.js

sorter.js

0 ms

QueryResults.js

QueryResults.js

0 ms

_HasDropDown.js

_HasDropDown.js

0 ms

popup.js

popup.js

0 ms

place.js

place.js

0 ms

Viewport.js

Viewport.js

0 ms

BackgroundIframe.js

BackgroundIframe.js

0 ms

DropDownMenu.js

DropDownMenu.js

0 ms

_MenuBase.js

_MenuBase.js

0 ms

_KeyNavContainer.js

_KeyNavContainer.js

0 ms

_Container.js

_Container.js

0 ms

_KeyNavMixin.js

_KeyNavMixin.js

0 ms

MenuItem.js

MenuItem.js

0 ms

_Contained.js

_Contained.js

0 ms

MenuSeparator.js

MenuSeparator.js

0 ms

Tooltip.js

Tooltip.js

0 ms

manager.js

manager.js

0 ms

validate.js

validate.js

0 ms

Textarea.js

Textarea.js

0 ms

_ExpandingTextAreaMixin.js

_ExpandingTextAreaMixin.js

0 ms

SimpleTextarea.js

SimpleTextarea.js

0 ms

Toaster.css

Toaster.css

381 ms

logo.png

logo.png

10315 ms

LangCzech.png

LangCzech.png

12452 ms

LangEnglish.png

LangEnglish.png

12458 ms

portletTitleBarBg2.gif

portletTitleBarBg2.gif

12427 ms

helpMode.gif

helpMode.gif

12427 ms

editMode.gif

editMode.gif

12426 ms

configModeH.gif

configModeH.gif

12426 ms

viewMode.gif

viewMode.gif

12550 ms

bullet.gif

bullet.gif

12566 ms

upArrowGrey.png

upArrowGrey.png

12571 ms

356 ms

345 ms

351 ms

UpgradeBar.css

UpgradeBar.css

454 ms

blank.gif

blank.gif

448 ms

blank.gif

blank.gif

444 ms

validationInputBg.png

validationInputBg.png

443 ms

buttonEnabled.png

buttonEnabled.png

445 ms

Accessibility Review

portal.osu.cz accessibility score

92

Accessibility Issues

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.

Best Practices

portal.osu.cz best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

portal.osu.cz SEO score

86

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Portal.osu.cz can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Portal.osu.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

portal.osu.cz

Open Graph description is not detected on the main page of Portal Osu. 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: