4.6 sec in total
295 ms
4.1 sec
266 ms
Visit ptb.de now to see the best up-to-date Ptb content for Germany and also check out these interesting facts you probably never knew about ptb.de
Die Physikalisch-Technische Bundesanstalt (PTB), Braunschweig und Berlin, ist das nationale Metrologie-Institut mit wissenschaftlich-technischen Dienstleistungsaufgaben. Sie misst mit höchster Genauig...
Visit ptb.deWe analyzed Ptb.de page load time and found that the first response time was 295 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
ptb.de performance score
name
value
score
weighting
Value5.6 s
5/100
10%
Value5.7 s
16/100
25%
Value9.0 s
14/100
10%
Value30 ms
100/100
30%
Value0.017
100/100
15%
Value7.5 s
48/100
10%
295 ms
296 ms
509 ms
114 ms
191 ms
Our browser made a total of 83 requests to load all elements on the main page. We found that 89% of them (74 requests) were addressed to the original Ptb.de, 11% (9 requests) were made to Uhr.ptb.de. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Uhr.ptb.de.
Page size can be reduced by 80.3 kB (15%)
530.8 kB
450.5 kB
In fact, the total size of Ptb.de main page is 530.8 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. 35% of websites need less resources to load. Images take 455.9 kB which makes up the majority of the site volume.
Potential reduce by 61.3 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 61.3 kB or 82% of the original size.
Potential reduce by 19.1 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. Ptb images are well optimized though.
Number of requests can be reduced by 44 (63%)
70
26
The browser has sent 70 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ptb. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.
ptb.de
295 ms
www.ptb.de
296 ms
509 ms
news-basic.css
114 ms
stylesheet_b8e5b015d9.css
191 ms
main.css
209 ms
basics.css
306 ms
gateway.css
211 ms
publications.css
211 ms
calendar.css
223 ms
cssstyletypo3.css
300 ms
extensions.css
424 ms
homepage.css
317 ms
jquery-1.11.3.min.js
612 ms
shopdisplay.js
333 ms
jquery.mousewheel.min.js
422 ms
gateway.js
421 ms
overviewnav.js
427 ms
html5shiv.js
442 ms
html5shiv-printshiv.js
532 ms
MediaMatcher.min.js
534 ms
ausklapper.js
533 ms
publications.js
537 ms
Calendar.js
551 ms
jquery.tablesorter.min.js
744 ms
javascript_9a38f34785.js
628 ms
news.js
625 ms
socket.io.js
1174 ms
knockout.js
812 ms
uhr.js
812 ms
expertnews.js
628 ms
stylesheet_b8e5b015d9.css
535 ms
news.js
205 ms
javascript_9a38f34785.js
319 ms
expertnews.js
429 ms
desktop.css
116 ms
desktop.js
157 ms
homepage.gif
168 ms
logo_ptb.png
168 ms
kontrast.png
167 ms
gebaerdensprache.gif
168 ms
leichte-sprache.gif
168 ms
arrow-white.png
168 ms
header_img_1.jpg
874 ms
header_element.png
322 ms
ar-r-small-blue.gif
224 ms
ptb_willkommen.gif
321 ms
internal_link.gif
212 ms
download.gif
222 ms
csm_logo_bundesministerium_wirtschaft_und_energie_65b1bb6e2e.jpg
310 ms
csm_Windraeder_Fehmarn_a7f103d682.jpg
413 ms
csm_ytterbium-schema_3f7005ab91.jpg
414 ms
csm_NoiseModel_DE_b2f592400e.jpg
502 ms
csm_ytterbium-spektroskopie_0e8ef91f6b.jpg
418 ms
ar-l.gif
432 ms
ar-r.gif
525 ms
csm_title_mitteilungen_50b29d6d63.jpg
511 ms
csm_title_jb_2014_41d9d1f7f3.jpg
514 ms
csm_title_ptbnews_12016_e45aa7915b.jpg
623 ms
ar-t.gif
616 ms
ar-b.gif
622 ms
csm_igsm-logo-sw_bf10791137.png
611 ms
csm_quest-logo-sw_20f98c588d.png
621 ms
csm_helmholtz-logo_dae214243d.png
709 ms
csm_siemens-ring-logo_78840e01b0.png
713 ms
99 ms
schaufenster.html
807 ms
ar-l-bigblue.gif
577 ms
ar-r-bigblue.gif
666 ms
internal_link.gif
126 ms
download.gif
124 ms
103 ms
330 ms
232 ms
162 ms
230 ms
event-legend.gif
112 ms
print.css
115 ms
mobile.css
206 ms
x-small.css
112 ms
small.css
117 ms
medium.css
112 ms
large.css
116 ms
ptb.de accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
ptb.de best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
ptb.de SEO score
DE
DE
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ptb.de 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 Ptb.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.
ptb.de
Open Graph description is not detected on the main page of Ptb. 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: