Tools & Wizards About Us
rosenberger-osi.com screenshot

Report Summary

  • 67

    Performance

    Renders faster than
    79% 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.com

Rosenberger OSI: Your Expert in fiber optic cabling

Page Load Speed

4.4 sec in total

First Response

295 ms

Resources Loaded

3.4 sec

Page Rendered

766 ms

rosenberger-osi.com screenshot

About Website

Visit rosenberger-osi.com now to see the best up-to-date Rosenberger OSI content and also check out these interesting facts you probably never knew about rosenberger-osi.com

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

Visit rosenberger-osi.com

Key Findings

We analyzed Rosenberger-osi.com page load time and found that the first response time was 295 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

rosenberger-osi.com performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

69/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

75/100

25%

SI (Speed Index)

Value4.1 s

79/100

10%

TBT (Total Blocking Time)

Value330 ms

76/100

30%

CLS (Cumulative Layout Shift)

Value0.401

25/100

15%

TTI (Time to Interactive)

Value5.7 s

68/100

10%

Network Requests Diagram

rosenberger-osi.com

295 ms

osi.rosenberger.com

1468 ms

Flickity.dist.css

191 ms

CustomProperties.dist.min.css

285 ms

Info.dist.min.css

291 ms

Our browser made a total of 73 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Rosenberger-osi.com, 90% (66 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 (1.5 sec) relates to the external source Osi.rosenberger.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 189.9 kB (7%)

Content Size

2.7 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Rosenberger-osi.com 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. 55% 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 92.9 kB

  • Original 114.4 kB
  • After minification 108.4 kB
  • After compression 21.5 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 92.9 kB or 81% of the original size.

Image Optimization

-1%

Potential reduce by 22.7 kB

  • Original 2.5 MB
  • After minification 2.5 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 (29%)

Requests Now

65

After Optimization

46

  • Images
  • JavaScript
  • CSS

The browser has sent 65 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.com

rosenberger-osi.com

295 ms

osi.rosenberger.com

osi.rosenberger.com

1468 ms

Flickity.dist.css

Flickity.dist.css

191 ms

CustomProperties.dist.min.css

CustomProperties.dist.min.css

285 ms

Info.dist.min.css

Info.dist.min.css

291 ms

Styles.dist.min.css

Styles.dist.min.css

290 ms

Styles.min.css

Styles.min.css

291 ms

Base.dist.min.css

Base.dist.min.css

293 ms

Toggle.dist.min.css

Toggle.dist.min.css

292 ms

Content.dist.min.css

Content.dist.min.css

382 ms

Overlay.dist.min.css

Overlay.dist.min.css

389 ms

custom.css

custom.css

390 ms

Class.AutoLanguageRecommender.dist.min.js

Class.AutoLanguageRecommender.dist.min.js

392 ms

npm-combined.css

npm-combined.css

303 ms

styles.css

styles.css

408 ms

Flickity.dist.js

Flickity.dist.js

529 ms

Class.CookieManager.dist.min.js

Class.CookieManager.dist.min.js

406 ms

Function.loadBlogPosts.dist.min.js

Function.loadBlogPosts.dist.min.js

407 ms

Imagetips.dist.min.js

Imagetips.dist.min.js

405 ms

npm-combined.js

npm-combined.js

600 ms

js

js

53 ms

e1f17fb19514c04023342d6d555159b1

e1f17fb19514c04023342d6d555159b1

513 ms

logo.svg

logo.svg

195 ms

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_b3ddabe504.jpg

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259 ms

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260 ms

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197 ms

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csm_Home_Slider_Colocation_2022_887217ec4d.jpg

257 ms

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csm_Home_Slider_Webinar_Update_400_800G_2023_c17146b4e8.jpg

443 ms

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csm_Home_Slider_Managed_Services_8dc2a065e7.jpg

442 ms

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csm_Anwendungen_Rechenzentrum_6c3ba6eb36.jpg

453 ms

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462 ms

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458 ms

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445 ms

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444 ms

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csm_Colocation-RZ_4ed96c775c.jpg

460 ms

Logistik-Managed-Services.jpg

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758 ms

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csm_Header-Smarte-Gebaeudeverkabelung_8a1caf2122.jpg

556 ms

Industrial_Applications_Home.png

Industrial_Applications_Home.png

747 ms

Zitat_Icon_red.svg

Zitat_Icon_red.svg

565 ms

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csm_Vignal_5zu4_f49113907e.jpg

560 ms

csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_8faecdfbe8.jpg

csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_8faecdfbe8.jpg

563 ms

csm_CPQ_5zu4_05_2024_EN_3b26bb2a9a.jpg

csm_CPQ_5zu4_05_2024_EN_3b26bb2a9a.jpg

657 ms

Gruendung_Icon.svg

Gruendung_Icon.svg

659 ms

Mitarbeiter_Gruppe_Icon.svg

Mitarbeiter_Gruppe_Icon.svg

666 ms

Konfektionierung_Icon.svg

Konfektionierung_Icon.svg

669 ms

Kundenzufriedenheit_Icon.svg

Kundenzufriedenheit_Icon.svg

758 ms

csm_Mitgliedschaften_Abbinder_970bc21b30.jpg

csm_Mitgliedschaften_Abbinder_970bc21b30.jpg

764 ms

ROS_SOCIAL_ICONS_Facebook.svg

ROS_SOCIAL_ICONS_Facebook.svg

768 ms

ROS_SOCIAL_ICONS_LinkedIn.svg

ROS_SOCIAL_ICONS_LinkedIn.svg

770 ms

ROS_SOCIAL_ICONS_Xing.svg

ROS_SOCIAL_ICONS_Xing.svg

844 ms

ROS_SOCIAL_ICONS_Youtube.svg

ROS_SOCIAL_ICONS_Youtube.svg

854 ms

ROS_SOCIAL_ICONS_kununu.svg

ROS_SOCIAL_ICONS_kununu.svg

804 ms

normal_normal.woff

normal_normal.woff

802 ms

normal_condensed.woff

normal_condensed.woff

823 ms

italic_normal.woff

italic_normal.woff

824 ms

oblique_condensed.woff

oblique_condensed.woff

756 ms

Webfont.woff

Webfont.woff

766 ms

T100_22_Member_engl_vekt_rgb-optimized.svg

T100_22_Member_engl_vekt_rgb-optimized.svg

817 ms

staging.salesviewer.org

staging.salesviewer.org

574 ms

container_GnWY66tC.js

container_GnWY66tC.js

772 ms

csm_Home_Slider_Managed_Services_615b7a3572.jpg

csm_Home_Slider_Managed_Services_615b7a3572.jpg

662 ms

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_ca86913936.jpg

csm_Home_Slider_Verkabelungssysteme-Steckervergleich-OCTO_ca86913936.jpg

612 ms

csm_Home_Slider_VersaTray_a643ec3ae4.jpg

csm_Home_Slider_VersaTray_a643ec3ae4.jpg

674 ms

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csm_Home_Slider_ReadersChoiceAward_2024_1a05f8d5a0.jpg

644 ms

csm_Home_Slider_Colocation_2022_29726b9a92.jpg

csm_Home_Slider_Colocation_2022_29726b9a92.jpg

657 ms

csm_Home_Slider_Webinar_Update_400_800G_2023_83bc21a8a5.jpg

csm_Home_Slider_Webinar_Update_400_800G_2023_83bc21a8a5.jpg

631 ms

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csm_OSI-Services-EN_57e9aa7548.jpg

647 ms

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csm_Vignal_5zu4_aa7258e6f6.jpg

705 ms

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csm_Vergleich_Stecker-OCTO-Verkabelungssysteme_5zu4_e00520fc6d.jpg

714 ms

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csm_CPQ_5zu4_05_2024_EN_65082eb242.jpg

711 ms

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csm_Mitgliedschaften_Abbinder_69ef6a3abc.jpg

712 ms

count

count

401 ms

matomo.php

matomo.php

121 ms

Accessibility Review

rosenberger-osi.com 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.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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

rosenberger-osi.com 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.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 Rosenberger-osi.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

rosenberger-osi.com

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: