Tools & Wizards About Us
rosenberger-osi.de screenshot

Report Summary

  • 62

    Performance

    Renders faster than
    76% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

rosenberger-osi.de

Rosenberger OSI: Your Expert in fiber optic cabling

Page Load Speed

3.7 sec in total

First Response

321 ms

Resources Loaded

2.7 sec

Page Rendered

773 ms

rosenberger-osi.de screenshot

About Website

Click here to check amazing Rosenberger OSI content for United Kingdom. Otherwise, check out these important facts you probably never knew about rosenberger-osi.de

Expert in innovative fiber optic cabling infrastructure & service solutions. ✓Data center ✓Local networks ✓Industrial

Visit rosenberger-osi.de

Key Findings

We analyzed Rosenberger-osi.de page load time and found that the first response time was 321 ms and then it took 3.4 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

rosenberger-osi.de performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

65/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

49/100

25%

SI (Speed Index)

Value4.2 s

78/100

10%

TBT (Total Blocking Time)

Value240 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0.403

25/100

15%

TTI (Time to Interactive)

Value5.9 s

66/100

10%

Network Requests Diagram

rosenberger-osi.de

321 ms

osi.rosenberger.com

687 ms

Flickity.dist.css

186 ms

CustomProperties.dist.min.css

286 ms

Info.dist.min.css

287 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Rosenberger-osi.de, 90% (64 requests) were made to Osi.rosenberger.com and 3% (2 requests) were made to Visableleads.com. The less responsive or slowest element that took the longest time to load (817 ms) relates to the external source Osi.rosenberger.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 186.8 kB (7%)

Content Size

2.7 MB

After Optimization

2.5 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Rosenberger-osi.de main page is 2.7 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. 60% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 89.7 kB

  • Original 110.9 kB
  • After minification 105.3 kB
  • After compression 21.2 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 89.7 kB or 81% of the original size.

Image Optimization

-1%

Potential reduce by 22.7 kB

  • Original 2.5 MB
  • After minification 2.4 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. Rosenberger OSI images are well optimized though.

JavaScript Optimization

-70%

Potential reduce by 74.4 kB

  • Original 107.0 kB
  • After minification 107.0 kB
  • After compression 32.6 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 74.4 kB or 70% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (30%)

Requests Now

63

After Optimization

44

  • Images
  • JavaScript
  • CSS

The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rosenberger OSI. 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 from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

rosenberger-osi.de

rosenberger-osi.de

321 ms

osi.rosenberger.com

osi.rosenberger.com

687 ms

Flickity.dist.css

Flickity.dist.css

186 ms

CustomProperties.dist.min.css

CustomProperties.dist.min.css

286 ms

Info.dist.min.css

Info.dist.min.css

287 ms

Styles.dist.min.css

Styles.dist.min.css

290 ms

Styles.min.css

Styles.min.css

292 ms

Base.dist.min.css

Base.dist.min.css

292 ms

Toggle.dist.min.css

Toggle.dist.min.css

292 ms

Content.dist.min.css

Content.dist.min.css

383 ms

Overlay.dist.min.css

Overlay.dist.min.css

385 ms

custom.css

custom.css

386 ms

Class.AutoLanguageRecommender.dist.min.js

Class.AutoLanguageRecommender.dist.min.js

387 ms

npm-combined.css

npm-combined.css

393 ms

styles.css

styles.css

404 ms

Flickity.dist.js

Flickity.dist.js

399 ms

Class.CookieManager.dist.min.js

Class.CookieManager.dist.min.js

398 ms

Function.loadBlogPosts.dist.min.js

Function.loadBlogPosts.dist.min.js

398 ms

Imagetips.dist.min.js

Imagetips.dist.min.js

401 ms

npm-combined.js

npm-combined.js

600 ms

js

js

52 ms

e1f17fb19514c04023342d6d555159b1

e1f17fb19514c04023342d6d555159b1

494 ms

logo.svg

logo.svg

192 ms

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_b3ddabe504.jpg

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_b3ddabe504.jpg

258 ms

csm_Home_Slider_VersaTray_a6ffa1abf3.jpg

csm_Home_Slider_VersaTray_a6ffa1abf3.jpg

259 ms

csm_Home_Slider_Colocation_2022_887217ec4d.jpg

csm_Home_Slider_Colocation_2022_887217ec4d.jpg

193 ms

csm_Home_Slider_Webinar_Update_400_800G_2023_c17146b4e8.jpg

csm_Home_Slider_Webinar_Update_400_800G_2023_c17146b4e8.jpg

194 ms

csm_Home_Slider_Managed_Services_8dc2a065e7.jpg

csm_Home_Slider_Managed_Services_8dc2a065e7.jpg

262 ms

csm_Anwendungen_Rechenzentrum_6c3ba6eb36.jpg

csm_Anwendungen_Rechenzentrum_6c3ba6eb36.jpg

455 ms

csm_Anwendungen_LokalesNetzwerk_e2ec6fba79.jpg

csm_Anwendungen_LokalesNetzwerk_e2ec6fba79.jpg

456 ms

csm_Anwendungen_Industrie_187ba370ae.jpg

csm_Anwendungen_Industrie_187ba370ae.jpg

457 ms

csm_Anwendungen_Mobilfunknetze_2aa0f75fee.jpg

csm_Anwendungen_Mobilfunknetze_2aa0f75fee.jpg

458 ms

csm_OSI-Services-EN_315875ebf4.jpg

csm_OSI-Services-EN_315875ebf4.jpg

455 ms

csm_Colocation-RZ_4ed96c775c.jpg

csm_Colocation-RZ_4ed96c775c.jpg

457 ms

Logistik-Managed-Services.jpg

Logistik-Managed-Services.jpg

749 ms

csm_Header-Smarte-Gebaeudeverkabelung_8a1caf2122.jpg

csm_Header-Smarte-Gebaeudeverkabelung_8a1caf2122.jpg

556 ms

Industrial_Applications_Home.png

Industrial_Applications_Home.png

660 ms

Zitat_Icon_red.svg

Zitat_Icon_red.svg

471 ms

csm_Vignal_5zu4_f49113907e.jpg

csm_Vignal_5zu4_f49113907e.jpg

551 ms

csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_8faecdfbe8.jpg

csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_8faecdfbe8.jpg

550 ms

csm_CPQ_5zu4_05_2024_EN_3b26bb2a9a.jpg

csm_CPQ_5zu4_05_2024_EN_3b26bb2a9a.jpg

571 ms

Gruendung_Icon.svg

Gruendung_Icon.svg

649 ms

Mitarbeiter_Gruppe_Icon.svg

Mitarbeiter_Gruppe_Icon.svg

653 ms

Konfektionierung_Icon.svg

Konfektionierung_Icon.svg

657 ms

Kundenzufriedenheit_Icon.svg

Kundenzufriedenheit_Icon.svg

676 ms

csm_Mitgliedschaften_Abbinder_970bc21b30.jpg

csm_Mitgliedschaften_Abbinder_970bc21b30.jpg

750 ms

ROS_SOCIAL_ICONS_Facebook.svg

ROS_SOCIAL_ICONS_Facebook.svg

751 ms

ROS_SOCIAL_ICONS_LinkedIn.svg

ROS_SOCIAL_ICONS_LinkedIn.svg

756 ms

ROS_SOCIAL_ICONS_Xing.svg

ROS_SOCIAL_ICONS_Xing.svg

757 ms

ROS_SOCIAL_ICONS_Youtube.svg

ROS_SOCIAL_ICONS_Youtube.svg

775 ms

ROS_SOCIAL_ICONS_kununu.svg

ROS_SOCIAL_ICONS_kununu.svg

790 ms

T100_22_Member_engl_vekt_rgb-optimized.svg

T100_22_Member_engl_vekt_rgb-optimized.svg

791 ms

normal_normal.woff

normal_normal.woff

791 ms

normal_condensed.woff

normal_condensed.woff

801 ms

italic_normal.woff

italic_normal.woff

801 ms

oblique_condensed.woff

oblique_condensed.woff

817 ms

Webfont.woff

Webfont.woff

755 ms

staging.salesviewer.org

staging.salesviewer.org

597 ms

container_GnWY66tC.js

container_GnWY66tC.js

783 ms

csm_Home_Slider_Managed_Services_615b7a3572.jpg

csm_Home_Slider_Managed_Services_615b7a3572.jpg

622 ms

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_ca86913936.jpg

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_ca86913936.jpg

620 ms

csm_Home_Slider_VersaTray_a643ec3ae4.jpg

csm_Home_Slider_VersaTray_a643ec3ae4.jpg

550 ms

csm_Home_Slider_Colocation_2022_29726b9a92.jpg

csm_Home_Slider_Colocation_2022_29726b9a92.jpg

550 ms

csm_Home_Slider_Webinar_Update_400_800G_2023_83bc21a8a5.jpg

csm_Home_Slider_Webinar_Update_400_800G_2023_83bc21a8a5.jpg

560 ms

csm_OSI-Services-EN_57e9aa7548.jpg

csm_OSI-Services-EN_57e9aa7548.jpg

617 ms

csm_Vignal_5zu4_aa7258e6f6.jpg

csm_Vignal_5zu4_aa7258e6f6.jpg

633 ms

csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_e00520fc6d.jpg

csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_e00520fc6d.jpg

607 ms

csm_CPQ_5zu4_05_2024_EN_65082eb242.jpg

csm_CPQ_5zu4_05_2024_EN_65082eb242.jpg

634 ms

csm_Mitgliedschaften_Abbinder_69ef6a3abc.jpg

csm_Mitgliedschaften_Abbinder_69ef6a3abc.jpg

689 ms

count

count

389 ms

matomo.php

matomo.php

126 ms

Accessibility Review

rosenberger-osi.de accessibility score

73

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

rosenberger-osi.de 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

rosenberger-osi.de SEO score

77

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

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Rosenberger-osi.de 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 Rosenberger-osi.de 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

rosenberger-osi.de

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