Tools & Wizards About Us
book.swiss.com screenshot

Report Summary

  • 14

    Performance

    Renders faster than
    26% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

book.swiss.com

Book tickets online now and fly into the world | SWISS

Page Load Speed

3.9 sec in total

First Response

589 ms

Resources Loaded

2.5 sec

Page Rendered

817 ms

book.swiss.com screenshot

About Website

Click here to check amazing Book SWISS content for Switzerland. Otherwise, check out these important facts you probably never knew about book.swiss.com

Book tickets online now and fly into the world. ✈ From check-in to disembarking: we place the highest value on hygiene and your health.

Visit book.swiss.com

Key Findings

We analyzed Book.swiss.com page load time and found that the first response time was 589 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

book.swiss.com performance score

14

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

24/100

10%

LCP (Largest Contentful Paint)

Value15.7 s

0/100

25%

SI (Speed Index)

Value15.2 s

1/100

10%

TBT (Total Blocking Time)

Value6,110 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.146

77/100

15%

TTI (Time to Interactive)

Value19.4 s

2/100

10%

Network Requests Diagram

book.swiss.com

589 ms

homepage

307 ms

swiss.css

64 ms

index.e7397909603e3420d8c2.css

46 ms

0.88ab05d76b8e23ff2ee9.css

86 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Book.swiss.com, 86% (31 requests) were made to Swiss.com and 6% (2 requests) were made to Tags.tiqcdn.com. The less responsive or slowest element that took the longest time to load (589 ms) belongs to the original domain Book.swiss.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.3 MB (54%)

Content Size

4.2 MB

After Optimization

2.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Book.swiss.com main page is 4.2 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 3.2 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 145.8 kB

  • Original 177.6 kB
  • After minification 157.4 kB
  • After compression 31.8 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 20.2 kB, which is 11% 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 145.8 kB or 82% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 747.1 kB
  • After minification 747.1 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. Book SWISS images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 2.1 MB

  • Original 3.2 MB
  • After minification 3.2 MB
  • After compression 1.1 MB

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 2.1 MB or 65% of the original size.

CSS Optimization

-37%

Potential reduce by 52.8 kB

  • Original 142.3 kB
  • After minification 130.1 kB
  • After compression 89.5 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. Book.swiss.com needs all CSS files to be minified and compressed as it can save up to 52.8 kB or 37% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (57%)

Requests Now

28

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Book SWISS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

book.swiss.com

book.swiss.com

589 ms

homepage

homepage

307 ms

swiss.css

swiss.css

64 ms

index.e7397909603e3420d8c2.css

index.e7397909603e3420d8c2.css

46 ms

0.88ab05d76b8e23ff2ee9.css

0.88ab05d76b8e23ff2ee9.css

86 ms

352.4417a6920d4f628c3c4f.css

352.4417a6920d4f628c3c4f.css

61 ms

25.c3de4e789cb77827e8a0.css

25.c3de4e789cb77827e8a0.css

33 ms

23.b844ef7039e0ae1fd8b0.css

23.b844ef7039e0ae1fd8b0.css

79 ms

utag.sync.js

utag.sync.js

23 ms

11233a11

11233a11

74 ms

maui-design-system.js

maui-design-system.js

400 ms

0.6391796abd1e87ce0e89.chunk.js

0.6391796abd1e87ce0e89.chunk.js

184 ms

352.a3fbc7b1ea84e49a9616.chunk.js

352.a3fbc7b1ea84e49a9616.chunk.js

150 ms

app.4ff9cfd80324bb139c0d.js

app.4ff9cfd80324bb139c0d.js

170 ms

25.7ef88ee42c54757b0784.chunk.js

25.7ef88ee42c54757b0784.chunk.js

223 ms

23.94dd2e3d228e90eb3c20.chunk.js

23.94dd2e3d228e90eb3c20.chunk.js

224 ms

index.7254cfbe6313e0e5c5a7.js

index.7254cfbe6313e0e5c5a7.js

218 ms

QPjU

QPjU

222 ms

6M8MR-RH2DX-GC26B-HLMBU-NA786

6M8MR-RH2DX-GC26B-HLMBU-NA786

34 ms

utag.js

utag.js

265 ms

swiss-logo.svg

swiss-logo.svg

76 ms

lx-icon-speech-bubble-questionmark.svg

lx-icon-speech-bubble-questionmark.svg

245 ms

img.jpg

img.jpg

250 ms

img.jpg

img.jpg

247 ms

img.jpg

img.jpg

246 ms

img.jpg

img.jpg

247 ms

img.jpg

img.jpg

258 ms

img.jpg

img.jpg

248 ms

star-alliance.svg

star-alliance.svg

250 ms

config.json

config.json

211 ms

chsans-regular-webfont.woff

chsans-regular-webfont.woff

129 ms

chsans-regular-webfont.woff

chsans-regular-webfont.woff

46 ms

chsans-light-webfont.woff

chsans-light-webfont.woff

34 ms

chsans-bold-webfont.woff

chsans-bold-webfont.woff

76 ms

chsans-bold-webfont.woff

chsans-bold-webfont.woff

167 ms

lx-iconfont.woff

lx-iconfont.woff

46 ms

Accessibility Review

book.swiss.com accessibility score

81

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

[aria-*] attributes do not have valid values

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

book.swiss.com best practices score

83

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

book.swiss.com SEO score

90

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Book.swiss.com 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 Book.swiss.com 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

book.swiss.com

Open Graph data is detected on the main page of Book SWISS. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: