Tools & Wizards About Us
lehmanns.ch screenshot

Report Summary

  • 47

    Performance

    Renders faster than
    67% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

lehmanns.ch

Lehmanns.ch: Fachbücher und eBooks versandkostenfrei bestellen - Lehmanns.ch

Page Load Speed

9.6 sec in total

First Response

463 ms

Resources Loaded

8.4 sec

Page Rendered

745 ms

lehmanns.ch screenshot

About Website

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

Bücher versandkostenfrei und ohne Mindestbestellwert kaufen. Fachliteratur schnell auf Rechnung geliefert. Huber & Lang und Lehmanns, Buchhandlung seit 1927.

Visit lehmanns.ch

Key Findings

We analyzed Lehmanns.ch page load time and found that the first response time was 463 ms and then it took 9.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

lehmanns.ch performance score

47

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

25/100

10%

LCP (Largest Contentful Paint)

Value10.0 s

0/100

25%

SI (Speed Index)

Value6.4 s

41/100

10%

TBT (Total Blocking Time)

Value390 ms

69/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value8.0 s

42/100

10%

Network Requests Diagram

lehmanns.ch

463 ms

www.lehmanns.ch

816 ms

min

414 ms

min

566 ms

doppelbox.css

1337 ms

Our browser made a total of 65 requests to load all elements on the main page. We found that 91% of them (59 requests) were addressed to the original Lehmanns.ch, 9% (6 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (5.2 sec) belongs to the original domain Lehmanns.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 120.5 kB (15%)

Content Size

826.4 kB

After Optimization

705.9 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Lehmanns.ch main page is 826.4 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. 25% of websites need less resources to load. Images take 702.7 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 68.1 kB

  • Original 83.5 kB
  • After minification 77.1 kB
  • After compression 15.4 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 68.1 kB or 82% of the original size.

Image Optimization

-7%

Potential reduce by 51.8 kB

  • Original 702.7 kB
  • After minification 651.0 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. Lehmanns images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 588 B

  • Original 40.2 kB
  • After minification 40.2 kB
  • After compression 39.6 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.

Requests Breakdown

Number of requests can be reduced by 13 (21%)

Requests Now

63

After Optimization

50

  • Images
  • JavaScript
  • CSS

The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lehmanns. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

lehmanns.ch

lehmanns.ch

463 ms

www.lehmanns.ch

www.lehmanns.ch

816 ms

min

min

414 ms

min

min

566 ms

doppelbox.css

doppelbox.css

1337 ms

doppelbox.css

doppelbox.css

2225 ms

analytics.js

analytics.js

52 ms

ga.js

ga.js

53 ms

lehmanns-header-logo.png

lehmanns-header-logo.png

131 ms

header-sprite.png

header-sprite.png

130 ms

34098176

34098176

1424 ms

39787592

39787592

449 ms

41109343

41109343

311 ms

41201228

41201228

2431 ms

26428

26428

620 ms

2592

2592

662 ms

21982

21982

815 ms

26418

26418

976 ms

25108086

25108086

1019 ms

37702021

37702021

1010 ms

27163849

27163849

1172 ms

26321

26321

1312 ms

26433

26433

1221 ms

26363

26363

1374 ms

26310

26310

1526 ms

25066

25066

1500 ms

41020462

41020462

1566 ms

38364162

38364162

1616 ms

33707820

33707820

3817 ms

22754522

22754522

1740 ms

26443

26443

1987 ms

41255707

41255707

1932 ms

37048687

37048687

1900 ms

30214989

30214989

2038 ms

28703180

28703180

2223 ms

26462

26462

2126 ms

26459

26459

2189 ms

26429

26429

2236 ms

26444

26444

2321 ms

26460

26460

2385 ms

26463

26463

2537 ms

26449

26449

2433 ms

linkid.js

linkid.js

58 ms

inpage_linkid.js

inpage_linkid.js

12 ms

collect

collect

26 ms

__utm.gif

__utm.gif

12 ms

26464

26464

2409 ms

18596009

18596009

2484 ms

15586835

15586835

2455 ms

15651751

15651751

2265 ms

18701765

18701765

2125 ms

10903

10903

2091 ms

3850

3850

2122 ms

26465

26465

2483 ms

23731

23731

2996 ms

26468

26468

5201 ms

24225

24225

4104 ms

arrow_right2.gif

arrow_right2.gif

1768 ms

23113

23113

1905 ms

fshadow_header.png

fshadow_header.png

1500 ms

shadow_line.png

shadow_line.png

1612 ms

shadow_footer.png

shadow_footer.png

1669 ms

icons-18-white.png

icons-18-white.png

1726 ms

min

min

207 ms

min

min

198 ms

Accessibility Review

lehmanns.ch accessibility score

83

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 input fields do not have accessible names

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

lehmanns.ch best practices score

67

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

lehmanns.ch SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

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

lehmanns.ch

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