Tools & Wizards About Us
irf.se screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    46% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 67% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

irf.se

IRF – Institutet för rymdfysik

Page Load Speed

2.1 sec in total

First Response

454 ms

Resources Loaded

1.5 sec

Page Rendered

159 ms

irf.se screenshot

About Website

Visit irf.se now to see the best up-to-date IRF content for Russia and also check out these interesting facts you probably never knew about irf.se

Swedish Institute of Space Physics webpages

Visit irf.se

Key Findings

We analyzed Irf.se page load time and found that the first response time was 454 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

irf.se performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value13.1 s

0/100

10%

LCP (Largest Contentful Paint)

Value21.9 s

0/100

25%

SI (Speed Index)

Value18.8 s

0/100

10%

TBT (Total Blocking Time)

Value440 ms

63/100

30%

CLS (Cumulative Layout Shift)

Value0.261

47/100

15%

TTI (Time to Interactive)

Value21.0 s

1/100

10%

Network Requests Diagram

irf.se

454 ms

irf.css.php

699 ms

IRF-Kiruna.jpg

271 ms

irfumea.jpg

623 ms

irfuppsala.jpg

376 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that all of those requests were addressed to Irf.se and no external sources were called. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Irf.se.

Page Optimization Overview & Recommendations

Page size can be reduced by 18.5 kB (9%)

Content Size

207.1 kB

After Optimization

188.6 kB

  • HTML
  • Images

In fact, the total size of Irf.se main page is 207.1 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. Images take 193.9 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 10.2 kB

  • Original 13.2 kB
  • After minification 10.6 kB
  • After compression 3.0 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. This page needs HTML code to be minified as it can gain 2.6 kB, which is 20% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 10.2 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 8.3 kB

  • Original 193.9 kB
  • After minification 185.6 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. IRF images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

11

After Optimization

11

  • Images
  • CSS

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of IRF. According to our analytics all requests are already optimized.

Network Requests Diagram

irf.se

irf.se

454 ms

irf.css.php

irf.css.php

699 ms

IRF-Kiruna.jpg

IRF-Kiruna.jpg

271 ms

irfumea.jpg

irfumea.jpg

623 ms

irfuppsala.jpg

irfuppsala.jpg

376 ms

irflund.jpg

irflund.jpg

375 ms

irfhead.gif

irfhead.gif

249 ms

l_campus.gif

l_campus.gif

622 ms

feed-icon-28x28.png

feed-icon-28x28.png

374 ms

irflogo.gif

irflogo.gif

818 ms

irflogo_print.jpg

irflogo_print.jpg

1066 ms

sv_flag.gif

sv_flag.gif

1065 ms

Accessibility Review

irf.se accessibility score

87

Accessibility Issues

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

Links do not have a discernible name

Best Practices

irf.se best practices score

75

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

Browser errors were logged to the console

SEO Factors

irf.se SEO score

82

Search Engine Optimization Advices

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    SV

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Irf.se can be misinterpreted by Google and other search engines. Our service has detected that Swedish is used on the page, and it does not match the claimed English language. Our system also found out that Irf.se main page’s claimed encoding is iso-8859-1. 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.

Social Sharing Optimization

irf.se

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