www.uni-stuttgart.de speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 15:09 UTC. Grade E (57/100), with the screenshots, the timings and the fixes that matter.

https://www.uni-stuttgart.de/

20 October 2026 at 15:09 UTC · Free test · report pt_5de8f20091dc
Grade
E
57/100
Performance57/100
Structure56/100

8 audit(s) passed, 8 need work

First byte (TTFB)751 msmeasured from this server
Fully loaded2.25 sfirst byte + slowest asset
Requests26document + assets
Page weight7.01 MBcompressed transfer
HTML document154.2 KBno compression
ProtocolHTTP/3OpenCms/21.0.27
Third-party1.25 MBother hosts

Where the first byte went

  • DNS lookup 53 ms 7%
  • TCP connect 157 ms 21%
  • Server wait 541 ms 72%

Measured on the connection that fetched the HTML. Every other request on the page waits for the end of this bar before it can start.

How this page compares

First byteslower than 73% of 4,999 pages tested here751 ms against a median of 448 ms
Page weightheavier than 95% of 4,999 pages tested here7.01 MB against a median of 650.3 KB
Fully loadedslower than 66% of 4,999 pages tested here2.25 s against a median of 1.84 s
Requestssends more requests than 100% of 4,999 pages tested here26 against a median of 26

Every report published here is in this comparison, so it is a reference population of pages tested from one server - not a benchmark of the whole web.

What these numbers mean

  • The first byte took 751 ms. Everything else waits for that number, so the server is where to start: caching, a slow query, or an overloaded host.
  • The page transfers 7.01 MB over 26 request(s). Images files are 98% of it, so resize and recompress the largest images before anything else.
  • It runs over HTTP/3, so the assets share a connection instead of opening one each.
  • The largest element took 2.64 s to paint, past the 2.5 s threshold: usually a hero image that is too big or a render-blocking script in front of it.
  • Layout shift is 0.718 (good is under 0.1): something without a reserved size is loading late - an image, an ad, or a font swap.

Fix first: Server response time (TTFB) - Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.

Read on one shared server, not a visitor's phone: use it to compare pages against each other, not as a promise about every connection. We fix what these tests find.

Screenshot

What the page looks like

Loaded in headless Chromium on this server. Click an image to open it full size.

Mobile screenshot of www.uni-stuttgart.de
Mobile 390 × 844 · 168.5 KB · page is 6000 px tall

Browser render

The same URL loaded in a real browser, so these are the readings curl cannot produce. The grade above is still built from the server measurements.

Largest contentful paint2.64 sgood is under 2.5 s
Cumulative layout shift0.718under 0.1 is stable
Total blocking timenone over 50 mslong tasks during load
First contentful paint2.04 sfirst content on screen
Browser page weight24.70 MB60 request(s), scripts included
Largest contentful paint2.64 s
Needs improvementgood under 2.5 s, poor over 4 s
Cumulative layout shift0.718
Poorgood under 0.1, poor over 0.25
Total blocking timenone over 50 ms
Goodgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Images 25 requests
6.86 MB 98%

Transfer size, compressed as sent. 26 request(s) in total, 7.01 MB across all of them.

Top issues

Server response time (TTFB)

high impact

The first byte arrived after 751 ms. Of that, 541 ms was the server thinking and 210 ms was connection setup. A first byte under 400 ms is what a visitor feels as instant.

Fix: Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.

Compress text responses

high impact

0 text response(s) of 10 KB or more are sent uncompressed, and the document itself is compressed. That is 0 B of compressible text.

Fix: Turn on brotli (preferred) or gzip for text/css, javascript and text/html in the web server. This is the cheapest win available on almost any site.

Image delivery and format

high impact

7 image(s) over 200 KB and 7 large image(s) still served as JPEG or PNG.

Fix: Serve WebP or AVIF with a JPEG fallback, size images to the space they occupy, and lazy-load anything below the fold. Images are usually more than half of a slow page.

Render-blocking resources

high impact

16 render-blocking resource(s) in the document head (9 script(s), 7 stylesheet(s)). The page cannot paint until each one arrives.

Fix: Add defer or async to scripts that do not change the first paint, inline the critical CSS, and load the rest with media="print" plus an onload swap.

Total page weight

high impact

The page transfers 7.01 MB across 26 request(s), with the document itself at 154.2 KB.

Fix: Work through the heaviest assets first: images, then fonts, then third-party scripts.

Waterfall

Slowest requests

IMAGESwww.izkt.uni-stuttgart.de/img/04-veranstaltungsankuendigung/Adob…
1.50 s
IMAGESwww.uni-stuttgart.de/.uni/hkom/forschung/img/digit.jpg
1.37 s
IMAGESwww.uni-stuttgart.de/forschung/forschung-leben/11-2018/img_…
1.34 s
IMAGESwww.uni-stuttgart.de/universitaet/aktuelles/img-news/01_07-…
1.30 s
IMAGESwww.irs.uni-stuttgart.de/img/img_veranstaltungen/Von-Perservera…
1.28 s
IMAGESwww.uni-stuttgart.de/forschung/img/profilbild-aerospace-tec…
1.27 s
IMAGESwww.uni-stuttgart.de/universitaet/aktuelles/img-news/26_10_…
1.26 s
IMAGESwww.uni-stuttgart.de/universitaet/aktuelles/img-veranstaltu…
1.24 s
IMAGESwww.uni-stuttgart.de/universitaet/arbeitgeberin/img/FL2A902…
1.24 s
IMAGESwww.uni-stuttgart.de/universitaet/aktuelles/img-news/news-2…
1.23 s

Each bar is one request's own response time, scaled to the slowest. Assets were fetched in parallel, so the bars overlap in real time rather than stacking. first party third party

RequestTypeStatusTimeSize
https://www.izkt.uni-stuttgart.de/img/04-veranstaltungsankuendigung/AdobeStock_2079773736.jpeg?__scale=w:555,h:555,cx:2205,cy:615,cw:1527,ch:1527 3rd partyimages2001.50 s72.7 KB
https://www.uni-stuttgart.de/.uni/hkom/forschung/img/digit.jpg?__scale=w:370,h:370,cx:1079,cy:0,cw:2507,ch:2507images2001.37 s27.1 KB
https://www.uni-stuttgart.de/forschung/forschung-leben/11-2018/img_112018/Bild5.jpg?__scale=w:370,h:370,cx:0,cy:0,cw:1051,ch:1051images2001.34 s70.9 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-news/01_07-RH3076-0036.jpg?__scale=w:370,h:370,cx:240,cy:0,cw:1500,ch:1500images2001.30 s54.5 KB
https://www.irs.uni-stuttgart.de/img/img_veranstaltungen/Von-Perserverance-zu-Rocky-Robotik-als-Hobby/Rocky.png?__scale=w:555,h:555,cx:401,cy:0,cw:1024,ch:1024 3rd partyimages2001.28 s1.18 MB
https://www.uni-stuttgart.de/forschung/img/profilbild-aerospace-technologies.jpg?__scale=w:370,h:370,cx:642,cy:0,cw:2555,ch:2555images2001.27 s45.6 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-news/26_10_Avete_Rektor.JPG?__scale=w:220,h:220,cx:480,cy:0,cw:2880,ch:2880images2001.26 s29.8 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-veranstaltungen/bwl-symposium-2026.png?__scale=w:555,h:555,cx:0,cy:10,cw:391,ch:391images2001.24 s1.18 MB
https://www.uni-stuttgart.de/universitaet/arbeitgeberin/img/FL2A9029_websize.jpg?__scale=w:370,h:370,cx:512,cy:397,cw:434,ch:434images2001.24 s54.5 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-news/news-26-10-rotunda-1.JPG?__scale=w:220,h:220,cx:0,cy:640,cw:3840,ch:3840images2001.23 s33.9 KB
https://www.uni-stuttgart.de/universitaet/img/04_Luftaufnahme-Campus-Vaihingen.jpg?__scale=w:370,h:370,cx:960,cy:0,cw:3839,ch:3839images2001.23 s51.0 KB
https://www.uni-stuttgart.de/universitaet/img/02_Hoersaal-Vorlesung.jpg?__scale=w:370,h:370,cx:960,cy:0,cw:3839,ch:3839images2001.23 s64.8 KB
https://www.uni-stuttgart.de/forschung/img/imwf1.jpg?__scale=w:370,h:370,cx:640,cy:0,cw:2560,ch:2560images2001.22 s37.1 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-presseinfo/pm-43-26-universitaet-stuttgart-NextBauBW-DFZ-BMWSB-Slider.JPG?__scale=w:1170,h:658,cx:0,cy:282,cw:3840,ch:2159images2001.22 s222.5 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-presseinfo/download/pm-45-icm-atmo-publikum_01.jpg?__scale=w:220,h:220,cx:1000,cy:0,cw:4000,ch:4000images2001.22 s26.9 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-presseinfo/download/46-26-connAIx-rothemund-middendorf-uni-stuttgart.jpg?__scale=w:1170,h:658,cx:0,cy:536,cw:5712,ch:3212images2001.22 s228.2 KB
https://www.uni-stuttgart.de/forschung/profil/img/simulation-der-wirbelbildung.jpg?__scale=w:1170,h:658,cx:0,cy:0,cw:1379,ch:775images2001.22 s199.8 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/idl/img/Middendorf2.jpg?__scale=w:220,h:220,cx:548,cy:0,cw:2743,ch:2743images2001.21 s25.0 KB
https://www.uni-stuttgart.de/system/modules/de.stuttgart.uni.v3.basics/resources/img/svg/logo-start-inverted-de.svgimages2001.20 s17.1 KB
https://www.uni-stuttgart.de/system/modules/de.stuttgart.uni.v3.basics/resources/img/svg/logo-start-de.svgimages2001.19 s17.0 KB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-presseinfo/download/pm-41-am-flex-universitaet-stuttgart-ivlr-amflexinj.png?__scale=w:1170,h:658,cx:0,cy:337,cw:3558,ch:2000images2001.19 s2.94 MB
https://www.uni-stuttgart.de/universitaet/aktuelles/img-presseinfo/innovationscampus-sicherheit-verteidigung-ur-1.jpg?__scale=w:1170,h:658,cx:0,cy:200,cw:3840,ch:2159images2001.19 s238.7 KB
https://www.uni-stuttgart.de/system/modules/de.stuttgart.uni.v3.basics/resources/img/svg/logo-inverted-de.svgimages2001.17 s16.9 KB
https://www.uni-stuttgart.de/system/modules/de.stuttgart.uni.v3.basics/resources/img/svg/logo-de.svgimages2001.17 s16.9 KB
https://www.uni-stuttgart.de/forschung/profil/img/technik-und-wissenschaft-news-03-25-erf-2-fraesroboter-holzverarbeitung-universitaet-stuttgart-isw.jpg?__scale=w:370,h:370,cx:640,cy:0,cw:2560,ch:2560images2001.16 s57.0 KB
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