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osdc.de

Website review osdc.de

 Generated on May 08 2019 15:35 PM

Old statistics? UPDATE !


The score is 47/100

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SEO Content

Title

OSDC | Open Source Data Center Conference



Length : 41

Perfect, your title contains between 10 and 70 characters.
Description



Length : 0

Very bad. We haven't found meta description on your page. Use this free online meta tags generator to create description.
Keywords



Very bad. We haven't found meta keywords on your page. Use this free online meta tags generator to create keywords.
Og Meta Properties This page does not take advantage of Og Properties. This tags allows social crawler's better structurize your page. Use this free og properties generator to create them.
Headings
H1 H2 H3 H4 H5 H6
6 4 10 6 7 1
  • [H1] WHAT IS THE OSDC ABOUT?
  • [H1] FEATURED SPEAKERS
  • [H1] MEET OPEN SOURCE EXPERTS FROM INDUSTRY LEADERS
  • [H1] OSDC 2019 SPONSORS
  • [H1] OSDC SPONSORSHIP
  • [H1] GET THE OSDC APP!
  • [H2] FREE WORKSHOP
  • [H2] OPEN SOURCE CAMP ON ANSIBLE
  • [H2] VENUE
  • [H2] DINNER & DRINKS
  • [H3] Innovative strategies, forward-looking developments and new perspectives in dealing with complex data centers are the topics of OSDC.
  • [H3] “Mgmt Config: Autonomous, real-time systems“ with James Shubin
  • [H3] Join the Camp and Ansibuild your Automation skills!
  • [H3] Register and book your accommodation right away with your OSDC ticket.
  • [H3] On May 14 we invite you to a relaxed and convivial conclusion of the first conference day.
  • [H3] A big thank you goes to our sponsors! With their involvement they enrich the event quite considerably.
  • [H3] Became curious?
  • [H3] Take your opportunity to meet and network with the exciting, and ever-growing Open Source community. Customize your presence at OSDC with our versatile and custom-fit sponsorship program.
  • [H3] Up-to-date with all important OSDC information, the latest facts and news.
  • [H3] Stay tuned any time, anywhere!
  • [H4] TANAY PANT
  • [H4] KOSISOCHUKWU ANYANWU
  • [H4] NIKHIL KATHOLE
  • [H4] JAMES SHUBIN
  • [H4] THIERRY DE PAUW
  • [H4] MATT JARVIS
  • [H5] Crate.io
  • [H5] Kinvolk GmbH
  • [H5] Red Hat
  • [H5] ThinkingLabs
  • [H5] Mesosphere
  • [H5] MEDIA PARTNERS
  • [H5] MEDIA PARTNER
  • [H6] SILVER SPONSOR
Images We found 40 images on this web page.

39 alt attributes are empty or missing. Add alternative text so that search engines can better understand the content of your images.
Text/HTML Ratio Ratio : 6%

This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content.
Flash Perfect, no Flash content has been detected on this page.
Iframe Great, there are no Iframes detected on this page.

URL Rewrite Good. Your links looks friendly!
Underscores in the URLs Perfect! No underscores detected in your URLs.
In-page links We found a total of 21 links including 0 link(s) to files



Anchor Type Juice
OVERVIEW Internal Passing Juice
AGENDA Internal Passing Juice
TICKETS Internal Passing Juice
SPEAKERS Internal Passing Juice
SPONSOR Internal Passing Juice
ARCHIVE Internal Passing Juice
OSCAMP External Passing Juice
GET YOUR TICKET Internal Passing Juice
WANT TO KNOW MORE? Internal Passing Juice
“Mgmt Config: Autonomous, real-time systems“ with James Internal Passing Juice
FIND OUT MORE External Passing Juice
Venue Details Internal Passing Juice
Find Out More Internal Passing Juice
Code of Conduct Internal Passing Juice
Speaker Agreement Internal Passing Juice
Terms & Conditions Internal Passing Juice
Venue Internal Passing Juice
Contact Internal Passing Juice
Imprint Internal Passing Juice
Privacy Statement External Passing Juice
More about NETWAYS External Passing Juice

SEO Keywords

Keywords Cloud media event sponsorship sponsor speakers open netways venue osdc gmbh
Keywords Consistency
Keyword Content Title Keywords Description Headings
osdc 4
venue 3
sponsorship 3
media 2
gmbh 2

Usability

Url Domain : osdc.de
Length : 7
Favicon Great, your website has a favicon.
Printability We could not find a Print-Friendly CSS.
Language Good. Your declared language is en.
Dublin Core This page does not take advantage of Dublin Core.

Document

Doctype HTML 5
Encoding Perfect. Your declared charset is UTF-8.
W3C Validity Errors : 28
Warnings : 23
Email Privacy Great no email address has been found in plain text!
Deprecated HTML Great! We haven't found deprecated HTML tags in your HTML.
Speed Tips
Excellent, your website doesn't use nested tables.
Too bad, your website is using inline styles.
Too bad, your website has too many CSS files (more than 4).
Too bad, your website has too many JS files (more than 6).
Too bad, your website does not take advantage of gzip.

Mobile

Mobile Optimization
Apple Icon
Meta Viewport Tag
Flash content

Optimization

XML Sitemap Missing

Your website does not have an XML sitemap - this can be problematic.

A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
Robots.txt http://osdc.de/robots.txt

Great, your website has a robots.txt file.
Analytics Great, your website has an analytics tool.

   Google Analytics

PageSpeed Insights


29 / 100    Speed
  Should Fix:
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 1.1MiB (79% reduction).

  • Compressing https://osdc.de/wp-content/themes/Divi/style.css?ver=3.18.8 could save 578.4KiB (89% reduction).
  • Compressing https://osdc.de/wp-content/themes/Divi/js/custom.min.js?ver=3.18.8 could save 196.7KiB (76% reduction).
  • Compressing https://tickets.netways.de/widget/v1.en.js?ver=5.2.2 could save 99.5KiB (70% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp could save 61.6KiB (65% reduction).
  • Compressing https://osdc.de/ could save 49.4KiB (81% reduction).
  • Compressing https://osdc.de/wp-includes/css/dist/block-library/style.min.css?ver=5.2.2 could save 24KiB (83% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/js/jquery.carouFredSel-6.2.1-packed.js?ver=5.2.2 could save 21.4KiB (60% reduction).
  • Compressing https://osdc.de/wp-includes/css/dashicons.min.css?ver=5.2.2 could save 18.6KiB (41% reduction).
  • Compressing https://osdc.de/wp-content/cache/et/1/5/global/et-divi-customizer-global-15614687255129.min.css could save 17.7KiB (80% reduction).
  • Compressing https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.validate.min.js?ver=5.2.2 could save 17KiB (67% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1 could save 12.3KiB (79% reduction).
  • Compressing https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2 could save 10.6KiB (71% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/style.css?ver=5.2.2 could save 9.3KiB (79% reduction).
  • Compressing https://osdc.de/wp-includes/js/wp-emoji-release.min.js?ver=5.2.2 could save 9KiB (66% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/ui/tabs.min.js?ver=1.11.4 could save 8KiB (67% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/event_template.css?ver=5.2.2 could save 7KiB (79% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2 could save 6KiB (73% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1 could save 5.9KiB (60% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/responsive.css?ver=5.2.2 could save 4.6KiB (80% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4 could save 4.2KiB (62% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cptui-speakers/assets/css/cptui-speakers.css?ver=5.2.2 could save 2.9KiB (77% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/superfish.css?ver=5.2.2 could save 2.5KiB (68% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4 could save 2.1KiB (54% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2 could save 2KiB (50% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cptui-sponsors/assets/css/cptui-sponsors.css?ver=5.2.2 could save 1.8KiB (72% reduction).
  • Compressing https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/css/jvcf7_validate.css?ver=5.2.2 could save 1.1KiB (65% reduction).
  • Compressing https://osdc.de/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.1.3 could save 1KiB (61% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cptui-archive/assets/css/cptui-archive.css?ver=5.2.2 could save 839B (65% reduction).
  • Compressing https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8 could save 783B (57% reduction).
  • Compressing https://osdc.de/wp-includes/js/wp-embed.min.js?ver=5.2.2 could save 650B (47% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-wp-pretix//assets/style/pretix-wp-plugin.css?ver=5.2.2 could save 424B (56% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cf7-conditional-fields/style.css?ver=1.6.1 could save 118B (33% reduction).
Show how to fix
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 15 blocking script resources and 18 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

  • https://osdc.de/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp
  • https://osdc.de/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1
  • https://tickets.netways.de/widget/v1.en.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.validate.min.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2
  • https://osdc.de/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4
  • https://osdc.de/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4
  • https://osdc.de/wp-includes/js/jquery/ui/tabs.min.js?ver=1.11.4
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.carouFredSel-6.2.1-packed.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2
  • https://osdc.de/wp-content/themes/Divi/js/custom.min.js?ver=3.18.8
  • https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8
  • https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1
  • https://osdc.de/wp-includes/js/wp-embed.min.js?ver=5.2.2

Optimize CSS Delivery of the following:

  • https://osdc.de/wp-includes/css/dist/block-library/style.min.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.1.3
  • https://osdc.de/wp-content/plugins/cptui-archive/assets/css/cptui-archive.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/cptui-speakers/assets/css/cptui-speakers.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/cptui-sponsors/assets/css/cptui-sponsors.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/css/jvcf7_validate.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/superfish.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/style.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/event_template.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/responsive.css?ver=5.2.2
  • https://fonts.googleapis.com/css?family=Lato%3A400%2C700&ver=5.2.2
  • https://tickets.netways.de/NES/osdc2019/widget/v1.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-wp-pretix//assets/style/pretix-wp-plugin.css?ver=5.2.2
  • https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800&subset=latin,latin-ext
  • https://osdc.de/wp-content/themes/Divi/style.css?ver=3.18.8
  • https://osdc.de/wp-includes/css/dashicons.min.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/cf7-conditional-fields/style.css?ver=1.6.1
  • https://osdc.de/wp-content/cache/et/1/5/global/et-divi-customizer-global-15614687255129.min.css
Show how to fix
Optimize images
Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 474.9KiB (43% reduction).

  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/03/purpleidea-headshot-400x400.png could save 136.9KiB (30% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/Thomas-Krenn_Logo_300-2.png could save 83KiB (90% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/Admin_Magazin_Logo_300-02-02-02.png could save 52.3KiB (90% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/Linux-Magazin_Logo_300-03-03.png could save 50.1KiB (92% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_inovex.png could save 44.6KiB (80% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/03/OSDC_2019_Schwarz-IT.png could save 35.9KiB (79% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/05/logotyp-SMSEagle_2017_Z_HASLEM.png could save 15.4KiB (67% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/04/toer_detail_big_bw.jpg could save 14.6KiB (11% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/05/201905_OSDC_ArchiveOnline-2.png could save 12KiB (32% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2017/07/appstore_google.png could save 5.1KiB (29% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2017/07/appstore_apple.png could save 3.5KiB (28% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_Thomas-Krenn_.png could save 3.3KiB (19% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_inuits.png could save 3KiB (25% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/04/OSDC__2019_Camunda.png could save 2.8KiB (24% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_nubego_.png could save 2.8KiB (17% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_kinvolk_.png could save 2.6KiB (22% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_Netways_.png could save 2.3KiB (21% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_Exoscale.png could save 2.2KiB (22% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_B1_.png could save 1.6KiB (14% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/04/201904_OSDC_new_500x188_2.png could save 647B (11% reduction).
Show how to fix
  Consider Fixing:
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

  • https://tickets.netways.de/widget/v1.en.js?ver=5.2.2 (60 seconds)
  • https://www.google-analytics.com/analytics.js (2 hours)
  • https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1 (2.5 days)
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.validate.min.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.carouFredSel-6.2.1-packed.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8 (2.5 days)
  • https://osdc.de/wp-content/themes/Divi/js/custom.min.js?ver=3.18.8 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/ui/tabs.min.js?ver=1.11.4 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4 (2.5 days)
  • https://osdc.de/wp-includes/js/wp-embed.min.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-includes/js/wp-emoji-release.min.js?ver=5.2.2 (2.5 days)
Show how to fix
Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 6.7KiB (17% reduction).

  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/style.css?ver=5.2.2 could save 1.5KiB (14% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/event_template.css?ver=5.2.2 could save 1.4KiB (17% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/responsive.css?ver=5.2.2 could save 1.2KiB (21% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/superfish.css?ver=5.2.2 could save 1KiB (28% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cptui-speakers/assets/css/cptui-speakers.css?ver=5.2.2 could save 477B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cptui-sponsors/assets/css/cptui-sponsors.css?ver=5.2.2 could save 286B (12% reduction).
  • Minifying https://osdc.de/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.1.3 could save 204B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/css/jvcf7_validate.css?ver=5.2.2 could save 204B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cf7-conditional-fields/style.css?ver=1.6.1 could save 159B (44% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cptui-archive/assets/css/cptui-archive.css?ver=5.2.2 could save 155B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-wp-pretix//assets/style/pretix-wp-plugin.css?ver=5.2.2 could save 130B (18% reduction).
Show how to fix
Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 7.4KiB (13% reduction).

  • Minifying https://osdc.de/ could save 7.4KiB (13% reduction).
Show how to fix
Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 30.7KiB (17% reduction).

  • Minifying https://tickets.netways.de/widget/v1.en.js?ver=5.2.2 could save 18.2KiB (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1 could save 5.6KiB (37% reduction).
  • Minifying https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2 could save 4KiB (28% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2 could save 1.9KiB (24% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2 could save 498B (13% reduction).
  • Minifying https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8 could save 452B (34% reduction).
Show how to fix
Prioritize visible content
Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

60.8KiB of the HTML response was required to render the above-the-fold content. This requires 3 network round-trips. However, if the HTML response were compressed, then the HTML required to render the above-the-fold content could be delivered in just 1 network round-trips. Enable compression for the HTML response in order to prioritize the visible content for this page.

  • Only about 36% of the final above-the-fold content could be rendered with the HTML delivered within 2 round-trips.
  • Click to see the screenshot with 2 round trips: snapshot:23
Show how to fix
  2 Passed Rules
Show details
Avoid landing page redirects

Your page has no redirects. Learn more about avoiding landing page redirects.

Reduce server response time

Your server responded quickly. Learn more about server response time optimization.


99 / 100    User Experience
  Consider Fixing:
Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

  • The tap target <span class="et_close_search_field"> is close to 2 other tap targets final.
Show how to fix
  4 Passed Rules
Show details
Avoid plugins

Your page does not appear to use plugins, which would prevent content from being usable on many platforms. Learn more about the importance of avoiding plugins.

Configure the viewport

Your page specifies a viewport matching the device's size, which allows it to render properly on all devices. Learn more about configuring viewports.

Size content to viewport

The contents of your page fit within the viewport. Learn more about sizing content to the viewport.

Use legible font sizes

The text on your page is legible. Learn more about using legible font sizes.


31 / 100    Speed
  Should Fix:
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 1.1MiB (79% reduction).

  • Compressing https://osdc.de/wp-content/themes/Divi/style.css?ver=3.18.8 could save 578.4KiB (89% reduction).
  • Compressing https://osdc.de/wp-content/themes/Divi/js/custom.min.js?ver=3.18.8 could save 196.7KiB (76% reduction).
  • Compressing https://tickets.netways.de/widget/v1.en.js?ver=5.2.2 could save 99.5KiB (70% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp could save 61.6KiB (65% reduction).
  • Compressing https://osdc.de/ could save 49.4KiB (81% reduction).
  • Compressing https://osdc.de/wp-includes/css/dist/block-library/style.min.css?ver=5.2.2 could save 24KiB (83% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/js/jquery.carouFredSel-6.2.1-packed.js?ver=5.2.2 could save 21.4KiB (60% reduction).
  • Compressing https://osdc.de/wp-includes/css/dashicons.min.css?ver=5.2.2 could save 18.6KiB (41% reduction).
  • Compressing https://osdc.de/wp-content/cache/et/1/5/global/et-divi-customizer-global-15614687255129.min.css could save 17.7KiB (80% reduction).
  • Compressing https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.validate.min.js?ver=5.2.2 could save 17KiB (67% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1 could save 12.3KiB (79% reduction).
  • Compressing https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2 could save 10.6KiB (71% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/style.css?ver=5.2.2 could save 9.3KiB (79% reduction).
  • Compressing https://osdc.de/wp-includes/js/wp-emoji-release.min.js?ver=5.2.2 could save 9KiB (66% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/ui/tabs.min.js?ver=1.11.4 could save 8KiB (67% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/event_template.css?ver=5.2.2 could save 7KiB (79% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2 could save 6KiB (73% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1 could save 5.9KiB (60% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/responsive.css?ver=5.2.2 could save 4.6KiB (80% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4 could save 4.2KiB (62% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cptui-speakers/assets/css/cptui-speakers.css?ver=5.2.2 could save 2.9KiB (77% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/style/superfish.css?ver=5.2.2 could save 2.5KiB (68% reduction).
  • Compressing https://osdc.de/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4 could save 2.1KiB (54% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2 could save 2KiB (50% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cptui-sponsors/assets/css/cptui-sponsors.css?ver=5.2.2 could save 1.8KiB (72% reduction).
  • Compressing https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/css/jvcf7_validate.css?ver=5.2.2 could save 1.1KiB (65% reduction).
  • Compressing https://osdc.de/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.1.3 could save 1KiB (61% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cptui-archive/assets/css/cptui-archive.css?ver=5.2.2 could save 839B (65% reduction).
  • Compressing https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8 could save 783B (57% reduction).
  • Compressing https://osdc.de/wp-includes/js/wp-embed.min.js?ver=5.2.2 could save 650B (47% reduction).
  • Compressing https://osdc.de/wp-content/plugins/net-wp-pretix//assets/style/pretix-wp-plugin.css?ver=5.2.2 could save 424B (56% reduction).
  • Compressing https://osdc.de/wp-content/plugins/cf7-conditional-fields/style.css?ver=1.6.1 could save 118B (33% reduction).
Show how to fix
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 15 blocking script resources and 18 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

  • https://osdc.de/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp
  • https://osdc.de/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1
  • https://tickets.netways.de/widget/v1.en.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.validate.min.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2
  • https://osdc.de/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4
  • https://osdc.de/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4
  • https://osdc.de/wp-includes/js/jquery/ui/tabs.min.js?ver=1.11.4
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.carouFredSel-6.2.1-packed.js?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2
  • https://osdc.de/wp-content/themes/Divi/js/custom.min.js?ver=3.18.8
  • https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8
  • https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1
  • https://osdc.de/wp-includes/js/wp-embed.min.js?ver=5.2.2

Optimize CSS Delivery of the following:

  • https://osdc.de/wp-includes/css/dist/block-library/style.min.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.1.3
  • https://osdc.de/wp-content/plugins/cptui-archive/assets/css/cptui-archive.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/cptui-speakers/assets/css/cptui-speakers.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/cptui-sponsors/assets/css/cptui-sponsors.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/css/jvcf7_validate.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/superfish.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/style.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/event_template.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-timetable/style/responsive.css?ver=5.2.2
  • https://fonts.googleapis.com/css?family=Lato%3A400%2C700&ver=5.2.2
  • https://tickets.netways.de/NES/osdc2019/widget/v1.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/net-wp-pretix//assets/style/pretix-wp-plugin.css?ver=5.2.2
  • https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800&subset=latin,latin-ext
  • https://osdc.de/wp-content/themes/Divi/style.css?ver=3.18.8
  • https://osdc.de/wp-includes/css/dashicons.min.css?ver=5.2.2
  • https://osdc.de/wp-content/plugins/cf7-conditional-fields/style.css?ver=1.6.1
  • https://osdc.de/wp-content/cache/et/1/5/global/et-divi-customizer-global-15614687255129.min.css
Show how to fix
Optimize images
Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 823.3KiB (63% reduction).

  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/03/purpleidea-headshot-400x400-300x300.png could save 105.9KiB (74% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/Thomas-Krenn_Logo_300-2.png could save 83.4KiB (91% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/Anyanwu_frei_-300x300.png could save 80.8KiB (73% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/Kathole_final_-300x300.png could save 61.5KiB (72% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/Admin_Magazin_Logo_300-02-02-02.png could save 52.5KiB (90% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/Linux-Magazin_Logo_300-03-03.png could save 50.3KiB (92% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_inovex.png could save 49.7KiB (89% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/Jarvis-300x300.png could save 43.1KiB (72% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/03/OSDC_2019_Schwarz-IT.png could save 40.3KiB (89% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/OSDC_2018_Referenten_example42_Martin-Alfke_100x100.png could save 29.6KiB (76% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/05/logotyp-SMSEagle_2017_Z_HASLEM.png could save 15.8KiB (69% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/OSDC_2018_Referenten_Mesosphere_Matt_100x100.png could save 15.2KiB (63% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/OSDC_2018_Referenten_Betajob_Anton_100x100.png could save 14.9KiB (65% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/04/toer_detail_big_bw.jpg could save 14.6KiB (11% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/04/OSDC__2019_Tikal.png could save 14.5KiB (60% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/de-Pauw-300x300.jpg could save 12.7KiB (76% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/05/201905_OSDC_ArchiveOnline-2.png could save 12KiB (32% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_Thomas-Krenn_.png could save 10.8KiB (61% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_nubego_.png could save 10.4KiB (60% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/Pant-300x300.jpg could save 10.2KiB (74% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/04/OSDC__2019_T-Systems.png could save 9.6KiB (61% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/OSDC_2019_DevRelate.png could save 7.7KiB (56% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_inuits.png could save 7.2KiB (57% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_kinvolk_.png could save 7KiB (57% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_B1_.png could save 6.9KiB (56% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/04/OSDC__2019_Camunda.png could save 6.8KiB (56% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_Netways_.png could save 6.1KiB (54% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/OSDC_2019_Go-jek_.png could save 6KiB (48% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/OSDC_2019_ThinkingLabs_.png could save 5.6KiB (46% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/02/OSDC_2019_Exoscale.png could save 5.5KiB (53% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2017/07/appstore_google.png could save 5.1KiB (29% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/OSDC_2019_Red-Hat_.png could save 4.3KiB (42% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/OSDC_2018_Referenten_Rewe-digital_Paul_100x100.png could save 4KiB (35% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2017/01/OSDC_2018_Referenten_crate_io_Jodok_100x100.png could save 3.9KiB (45% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2017/07/appstore_apple.png could save 3.5KiB (28% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/OSDC_2019_RSA_.png could save 3.1KiB (37% reduction).
  • Compressing and resizing https://osdc.de/wp-content/uploads/sites/5/2019/01/OSDC_2019_Cara.png could save 2.3KiB (30% reduction).
  • Compressing https://osdc.de/wp-content/uploads/sites/5/2019/04/201904_OSDC_new_500x188_2.png could save 647B (11% reduction).
Show how to fix
  Consider Fixing:
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

  • https://tickets.netways.de/widget/v1.en.js?ver=5.2.2 (60 seconds)
  • https://www.google-analytics.com/analytics.js (2 hours)
  • https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1 (2.5 days)
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.validate.min.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/net-timetable/js/jquery.carouFredSel-6.2.1-packed.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8 (2.5 days)
  • https://osdc.de/wp-content/themes/Divi/js/custom.min.js?ver=3.18.8 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/ui/core.min.js?ver=1.11.4 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/ui/tabs.min.js?ver=1.11.4 (2.5 days)
  • https://osdc.de/wp-includes/js/jquery/ui/widget.min.js?ver=1.11.4 (2.5 days)
  • https://osdc.de/wp-includes/js/wp-embed.min.js?ver=5.2.2 (2.5 days)
  • https://osdc.de/wp-includes/js/wp-emoji-release.min.js?ver=5.2.2 (2.5 days)
Show how to fix
Minify CSS
Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 6.7KiB (17% reduction).

  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/style.css?ver=5.2.2 could save 1.5KiB (14% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/event_template.css?ver=5.2.2 could save 1.4KiB (17% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/responsive.css?ver=5.2.2 could save 1.2KiB (21% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/style/superfish.css?ver=5.2.2 could save 1KiB (28% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cptui-speakers/assets/css/cptui-speakers.css?ver=5.2.2 could save 477B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cptui-sponsors/assets/css/cptui-sponsors.css?ver=5.2.2 could save 286B (12% reduction).
  • Minifying https://osdc.de/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=5.1.3 could save 204B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/css/jvcf7_validate.css?ver=5.2.2 could save 204B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cf7-conditional-fields/style.css?ver=1.6.1 could save 159B (44% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cptui-archive/assets/css/cptui-archive.css?ver=5.2.2 could save 155B (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-wp-pretix//assets/style/pretix-wp-plugin.css?ver=5.2.2 could save 130B (18% reduction).
Show how to fix
Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 7.4KiB (13% reduction).

  • Minifying https://osdc.de/ could save 7.4KiB (13% reduction).
Show how to fix
Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 30.7KiB (17% reduction).

  • Minifying https://tickets.netways.de/widget/v1.en.js?ver=5.2.2 could save 18.2KiB (13% reduction).
  • Minifying https://osdc.de/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=1.6.1 could save 5.6KiB (37% reduction).
  • Minifying https://osdc.de/wp-content/plugins/jquery-validation-for-contact-form-7/js/jquery.jvcf7_validation.js?ver=5.2.2 could save 4KiB (28% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/js/timetable.js?ver=5.2.2 could save 1.9KiB (24% reduction).
  • Minifying https://osdc.de/wp-content/plugins/net-timetable/js/jquery.ba-bbq.min.js?ver=5.2.2 could save 498B (13% reduction).
  • Minifying https://osdc.de/wp-content/themes/Divi/core/admin/js/common.js?ver=3.18.8 could save 452B (34% reduction).
Show how to fix
Prioritize visible content
Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

60.8KiB of the HTML response was required to render the above-the-fold content. This requires 3 network round-trips. However, if the HTML response were compressed, then the HTML required to render the above-the-fold content could be delivered in just 1 network round-trips. Enable compression for the HTML response in order to prioritize the visible content for this page.

  • Only about 25% of the final above-the-fold content could be rendered with the HTML delivered within 2 round-trips.
  • Click to see the screenshot with 2 round trips: snapshot:23
Show how to fix
  2 Passed Rules
Show details
Avoid landing page redirects

Your page has no redirects. Learn more about avoiding landing page redirects.

Reduce server response time

Your server responded quickly. Learn more about server response time optimization.



* The results are cached for 30s. If you have made changes to your page, please wait for 30s before re-running the test.