www.mdpi.com speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 12:25 UTC. Grade B (88/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 51 ms 10%
- TCP connect 15 ms 3%
- Server wait 466 ms 88%
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 531 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 260.1 KB over 26 request(s). Images files are 61% of it, so resize and recompress the largest images before anything else.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- 61% of the weight comes from other hosts (analytics, fonts, embeds), which also means their slow day becomes your slow day.
- The largest element painted at 160 ms, inside the 2.5 s Google calls good.
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.
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.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 26 request(s) in total, 260.1 KB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 531 ms. Of that, 466 ms was the server thinking and 66 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.
Render-blocking resources
high impact4 render-blocking resource(s) in the document head (1 script(s), 3 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.
HTML document size
medium impactThe document transfers 100.3 KB. A bloated document delays every other request, because nothing else can start until it is parsed.
Fix: Paginate long listings, move repeated markup into a template, and stop inlining large data URIs into the HTML.
Avoid extra redirects
medium impact1 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://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/materials-logo-sq.png?383a60561d4dedb8 3rd party | images | 200 | 1.42 s | 1.0 KB |
| https://mdpi-res.com/cdn-cgi/image/width=464%2Cheight=261/https://res.mdpi.com/data/societies-hero-mobile.webp 3rd party | images | 200 | 1.33 s | 18.6 KB |
| https://mdpi-res.com/data/main-homepage-hero.webp 3rd party | images | 200 | 1.29 s | 90.3 KB |
| https://mdpi-res.com/data/open-access.svg 3rd party | images | 200 | 1.25 s | 726 B |
| https://mdpi-res.com/cdn-cgi/image/width=342%2Cheight=180/https://mdpi-res.com/announcement_thumbnail/18856/Sponsorship%20Lund%20-%20thumbnail.png?v=1791389598 3rd party | images | 200 | 1.24 s | 6.9 KB |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/ijms-logo-sq.png?8474213734ff770b 3rd party | images | 200 | 1.20 s | 1.1 KB |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/remotesensing-logo-sq.png?1ace5a4b6c47121d 3rd party | images | 200 | 1.20 s | 1.1 KB |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/nutrients-logo-sq.png?9c2a50916d08fddc 3rd party | images | 200 | 1.19 s | 608 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/applsci-logo-sq.png?c706cab522490ca4 3rd party | images | 200 | 1.19 s | 1.1 KB |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/jcm-logo-sq.png?a3a9757d9587fc12 3rd party | images | 200 | 1.19 s | 542 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/sensors-logo-sq.png?e6c5d1b63c26048a 3rd party | images | 200 | 1.19 s | 622 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/sustainability-logo-sq.png?3798e4e58c765aed 3rd party | images | 200 | 1.19 s | 620 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/energies-logo-sq.png?4acb609819f4b6c3 3rd party | images | 200 | 1.18 s | 577 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/ijerph-logo-sq.png?723264ea56800ef4 3rd party | images | 200 | 1.18 s | 1.3 KB |
| https://mdpi-res.com/cdn-cgi/image/width=342%2Cheight=180/https://mdpi-res.com/announcement_thumbnail/18855/26CORP-Nobel%20Prize%20in%20Chemistry-Winner%20Banner%202026%201200x630%20%20-%20thumbnail.jpg?v=1791386466 3rd party | images | 200 | 1.18 s | 9.8 KB |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/polymers-logo-sq.png?a28a61cc1cd88ebc 3rd party | images | 200 | 1.17 s | 743 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/molecules-logo-sq.png?a847d0c066f04dd5 3rd party | images | 200 | 1.17 s | 626 B |
| https://mdpi-res.com/cdn-cgi/image/width=342%2Cheight=180/https://mdpi-res.com/announcement_thumbnail/18969/26CORP-OAW-Banners-Landing%20page-1200x630%20(1)%20-%20thumbnail.jpg?v=1791909004 3rd party | images | 200 | 1.17 s | 11.2 KB |
| https://mdpi-res.com/cdn-cgi/image/width=342%2Cheight=180/https://mdpi-res.com/announcement_thumbnail/18967/IOAP_%20MDPI%20x%20CCCU_SCIO_preview.png?v=1791892121 3rd party | images | 200 | 1.16 s | 8.5 KB |
| https://mdpi-res.com/cdn-cgi/image/width=56%2Cheight=30/https://mdpi-res.com/data/mdpi-logo-black.svg 3rd party | images | 200 | 1.16 s | 544 B |
| https://mdpi-res.com/cdn-cgi/image/width=70%2Cheight=56/https://mdpi-res.com/data/mdpi-logo-black.svg 3rd party | images | 200 | 1.16 s | 544 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/cancers-logo-sq.png?df81b5f48fc1cbc2 3rd party | images | 200 | 1.16 s | 1.2 KB |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/mathematics-logo-sq.png?72e5113f8e55c761 3rd party | images | 200 | 1.16 s | 732 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/electronics-logo-sq.png?627c4593cae3bd63 3rd party | images | 200 | 1.16 s | 704 B |
| https://mdpi-res.com/cdn-cgi/image/width=32%2Cheight=32/https://mdpi-res.com/img/journals/water-logo-sq.png?66b923b408293d2a 3rd party | images | 200 | 1.16 s | 471 B |
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