Tools & Wizards About Us
isl.ch screenshot

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

isl.ch

Discover ISL | International School of Lausanne

Page Load Speed

10 sec in total

First Response

267 ms

Resources Loaded

4.5 sec

Page Rendered

5.3 sec

isl.ch screenshot

About Website

Visit isl.ch now to see the best up-to-date ISL content for Canada and also check out these interesting facts you probably never knew about isl.ch

Explore the International School of Lausanne's comprehensive IB programmes for ages 3 to 18. Empowering students with knowledge and skills for a successful future.

Visit isl.ch

Key Findings

We analyzed Isl.ch page load time and found that the first response time was 267 ms and then it took 9.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

isl.ch performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value14.4 s

0/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value240 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value14.4 s

9/100

10%

Network Requests Diagram

isl.ch

267 ms

www.isl.ch

1975 ms

main.min.css

279 ms

26529902.js

554 ms

tarteaucitron.js

263 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 71% of them (22 requests) were addressed to the original Isl.ch, 10% (3 requests) were made to Fonts.gstatic.com and 3% (1 request) were made to Js-eu1.hs-scripts.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Isl.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 403.5 kB (7%)

Content Size

5.6 MB

After Optimization

5.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Isl.ch main page is 5.6 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 5.2 MB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 137.8 kB

  • Original 160.8 kB
  • After minification 121.1 kB
  • After compression 23.0 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 39.7 kB, which is 25% 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 137.8 kB or 86% of the original size.

Image Optimization

-5%

Potential reduce by 255.4 kB

  • Original 5.2 MB
  • After minification 4.9 MB

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. ISL images are well optimized though.

JavaScript Optimization

-8%

Potential reduce by 10.4 kB

  • Original 137.8 kB
  • After minification 137.8 kB
  • After compression 127.4 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 107.1 kB
  • After minification 107.1 kB
  • After compression 107.1 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. Isl.ch has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 8 (36%)

Requests Now

22

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ISL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

isl.ch

isl.ch

267 ms

www.isl.ch

www.isl.ch

1975 ms

main.min.css

main.min.css

279 ms

26529902.js

26529902.js

554 ms

tarteaucitron.js

tarteaucitron.js

263 ms

modernizr.js

modernizr.js

264 ms

build.min.js

build.min.js

556 ms

css2

css2

65 ms

Pour-le-reste.png

Pour-le-reste.png

122 ms

Learn.png

Learn.png

123 ms

Student-life.png

Student-life.png

122 ms

Community.png

Community.png

123 ms

About.png

About.png

557 ms

IMG_1991_banner-e1566489138575.jpg

IMG_1991_banner-e1566489138575.jpg

1159 ms

IMG_2879-1.jpg

IMG_2879-1.jpg

1705 ms

logo-superhuit.svg

logo-superhuit.svg

556 ms

Roboto-Regular.woff

Roboto-Regular.woff

634 ms

KFOmCnqEu92Fr1Me5g.woff

KFOmCnqEu92Fr1Me5g.woff

435 ms

Roboto-Medium.woff

Roboto-Medium.woff

634 ms

KFOlCnqEu92Fr1MmEU9vAA.woff

KFOlCnqEu92Fr1MmEU9vAA.woff

634 ms

Roboto-Light.woff

Roboto-Light.woff

633 ms

KFOlCnqEu92Fr1MmSU5vAA.woff

KFOlCnqEu92Fr1MmSU5vAA.woff

838 ms

ISLSemi-Regular.woff

ISLSemi-Regular.woff

633 ms

collectedforms.js

collectedforms.js

756 ms

banner.js

banner.js

735 ms

26529902.js

26529902.js

737 ms

fb.js

fb.js

715 ms

Rectangle2-2-456x0-c-default.jpg

Rectangle2-2-456x0-c-default.jpg

96 ms

menu-student-life-456x0-c-default.jpg

menu-student-life-456x0-c-default.jpg

271 ms

IMG_1646_carre-1-512x0-c-default.jpg

IMG_1646_carre-1-512x0-c-default.jpg

88 ms

tarteaucitron.en.js

tarteaucitron.en.js

88 ms

Accessibility Review

isl.ch accessibility score

83

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

Document doesn't have a <title> element

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

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

isl.ch best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

isl.ch SEO score

79

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

Document doesn't have a <title> element

High

Links do not have descriptive text

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Isl.ch 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 Isl.ch 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

isl.ch

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