www.uni-heidelberg.de/en speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 13:57 UTC. Grade B (85/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 78 ms 11%
- TCP connect 188 ms 27%
- Server wait 441 ms 62%
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
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 707 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 196.4 KB over 26 request(s). Images files are 56% of it, so resize and recompress the largest images before anything else.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/2, so the assets share a connection instead of opening one each.
- 56% of the weight comes from other hosts (analytics, fonts, embeds), which also means their slow day becomes your slow day.
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.
The headless browser did not capture this page when the test ran, so only the server measurements are shown.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 26 request(s) in total, 196.4 KB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 707 ms. Of that, 441 ms was the server thinking and 266 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.
Avoid extra redirects
medium impact2 redirect hop(s) before the page load started, each one a full round trip before the first byte.
Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Waterfall
Slowest requests
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
| Request | Type | Status | Time | Size |
|---|---|---|---|---|
| https://www.uni-heidelberg.de/en/sites/default/files/styles/1_1_4_aspect_375px_wide_/public/2026-09/wise-2026-27_vortragfilm_heimatfilm_key-visual.png?h=564d9838&itok=2ACgaff4 | html | 200 | 2.19 s | 12.9 KB |
| https://www.uni-heidelberg.de/en/sites/default/files/styles/1_1_4_aspect_375px_wide_/public/2026-09/sissoko_3_credit_owise_abuzaid.jpg?h=085d90c6&itok=d0wnkpy3 | html | 200 | 2.19 s | 12.9 KB |
| https://www.uni-heidelberg.de/en/sites/default/files/styles/1_1_4_aspect_375px_wide_/public/2026-09/bildmotiv_hce_welt-der-zukunft_less-doom-more-doing_hf.jpg?h=d7210a9f&itok=eIoTur0D | html | 200 | 2.13 s | 13.0 KB |
| https://www.uni-heidelberg.de/en/sites/default/files/styles/1_1_4_aspect_375px_wide_/public/2026-10/poster-hgl-hintergund.jpeg?h=fadf0a37&itok=7_hiDc7y | html | 200 | 2.06 s | 12.9 KB |
| https://www.uni-heidelberg.de/en/assets/index-C_Z-i0jA.js | html | 404 | 1.87 s | 0 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_4_3_aspect_0008/public/2018-06/bilder-176156-179930-1600.jpg?h=7dc007da&itok=A5Q9_i0m 3rd party | images | 200 | 1.41 s | 718 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_4_3_aspect_0008/public/2018-07/obel-ceremony-2017_sw.jpg?h=1b0f9815&itok=8GzsNsU8 3rd party | images | 200 | 1.37 s | 706 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_4_3_aspect_0375/public/2019-06/uh.jpg?h=074a1bd2&itok=_dIPHpvJ 3rd party | images | 200 | 1.36 s | 13.6 KB |
| https://backend.uni-heidelberg.de/sites/default/files/site_logo/icon-symbol-uh-logo-black_1_0.svg 3rd party | images | 200 | 1.32 s | 83.6 KB |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2020-10/deutschlandstipendiaten_gruppe_10x15-6546.jpg?h=90b5ac1f&itok=dMESINlX 3rd party | images | 200 | 1.27 s | 764 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2018-07/obel-ceremony-2017_sw.jpg?h=1b0f9815&itok=WuMJ16Qk 3rd party | images | 200 | 1.24 s | 738 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2018-06/bilder-176156-179930-1600.jpg?h=7dc007da&itok=QlW2i82I 3rd party | images | 200 | 1.24 s | 761 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2026-05/ruca_27_image_teaser.jpg?h=d1cb525d&itok=F5d4eSzf 3rd party | images | 200 | 1.23 s | 753 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_21_9_aspect_0021/public/2019-06/AdobeStock_131216681.jpeg?h=47f00bb3&itok=aZ9rH0Ad 3rd party | images | 200 | 1.23 s | 810 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2026-07/unispiegel_2026-2_imageteaser_0.jpg?h=d1cb525d&itok=IwjKJu5_ 3rd party | images | 200 | 1.23 s | 774 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2019-06/uh.jpg?h=074a1bd2&itok=_M7ZRbP4 3rd party | images | 200 | 1.23 s | 755 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_21_9_aspect_0021/public/2018-06/bilder-215983-222841-original.jpg?h=50f41ecc&itok=j-qPfZh9 3rd party | images | 200 | 1.23 s | 781 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_4_3_aspect_0008/public/2019-06/uh.jpg?h=074a1bd2&itok=YSekkwoq 3rd party | images | 200 | 1.23 s | 718 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_21_9_aspect_0021/public/2019-01/Bild_Exini_Uni_Umschlag_sand.png?h=644bf0e9&itok=yiUX52Vb 3rd party | images | 200 | 1.23 s | 383 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2026-08/Jahresbericht%20Teaser_4_1.png?h=d1cb525d&itok=kImpTaTh 3rd party | images | 200 | 1.22 s | 398 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_21_9_aspect_0021/public/2019-05/Studium_bearbeitet.jpg?h=4994e1c7&itok=J1mTcCO1 3rd party | images | 200 | 1.22 s | 795 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_3_2_aspect_0006/public/2026-10/uebergabe_rindfleisch_sammlung.jpg?h=ada05aa9&itok=biwo5omY 3rd party | images | 200 | 1.21 s | 712 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_21_9_aspect_0021/public/2018-06/bilder-266965-275361-original.jpg?h=a0951a4d&itok=WngXw0u7 3rd party | images | 200 | 1.21 s | 777 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_16_9_aspect_0016/public/2026-10/adobestock_1997628586.jpeg?h=626c5cc5&itok=k62eIN4M 3rd party | images | 200 | 1.21 s | 769 B |
| https://backend.uni-heidelberg.de/sites/default/files/styles/img_4_3_aspect_0008/public/2020-10/deutschlandstipendiaten_gruppe_10x15-6546.jpg?h=90b5ac1f&itok=11WK_IOa 3rd party | images | 200 | 1.20 s | 718 B |
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