usc.edu speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 13:13 UTC. Grade B (88/100), with the screenshots, the timings and the fixes that matter.

https://usc.edu/

20 October 2026 at 13:13 UTC · Free test · report pt_65eea57abae4
Grade
B
88/100
Performance92/100
Structure83/100

13 audit(s) passed, 3 need work

First byte (TTFB)365 msmeasured from this server
Fully loaded1.64 sfirst byte + slowest asset
Requests26document + assets
Page weight1.30 MBcompressed transfer
HTML document77.8 KBgzip
ProtocolHTTP/3nginx
Third-party210.4 KBother hosts

Where the first byte went

  • DNS lookup 93 ms 25%
  • TCP connect 75 ms 21%
  • Server wait 198 ms 54%

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 bytefaster than 62% of 4,999 pages tested here365 ms against a median of 449 ms
Page weightheavier than 70% of 4,999 pages tested here1.30 MB against a median of 650.3 KB
Fully loadedfaster than 62% of 4,999 pages tested here1.64 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 arrived in 365 ms. That is workable, and the cheapest win left is caching or a warmer connection.
  • The page transfers 1.30 MB over 26 request(s). Images files are 74% 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.
  • The largest element painted at 1.13 s, inside the 2.5 s Google calls good.
  • Layout stayed still (CLS 0.080), so nothing jumps under the reader's cursor.
  • The main thread was blocked for 34 ms in total, which is not enough to feel.

Fix first: Render-blocking resources - 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.

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 usc.edu
Mobile 390 × 844 · 213.6 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 paint1.13 sgood is under 2.5 s
Cumulative layout shift0.080under 0.1 is stable
Total blocking time34 mslong tasks during load
First contentful paint1.04 sfirst content on screen
Browser page weight1.32 MB71 request(s), scripts included
Largest contentful paint1.13 s
Goodgood under 2.5 s, poor over 4 s
Cumulative layout shift0.080
Goodgood under 0.1, poor over 0.25
Total blocking time34 ms
Goodgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Images 18 requests
983.3 KB 74%
Javascript 7 requests
270.5 KB 20%

Transfer size, compressed as sent. 26 request(s) in total, 1.30 MB across all of them.

Top issues

Render-blocking resources

high impact

7 render-blocking resource(s) in the document head (1 script(s), 6 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.

Image delivery and format

medium impact

0 image(s) over 200 KB and 4 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.

Total page weight

medium impact

The page transfers 1.30 MB across 26 request(s), with the document itself at 77.8 KB.

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

Waterfall

Slowest requests

JAVASCRIPTwww.instagram.com/embed.js
1.27 s
JAVASCRIPTwww.googletagmanager.com/gtag/js
1.10 s
JAVASCRIPTcdn-cookieyes.com/client_data/1b2030d678924bbc9332a40d/s…
1.09 s
IMAGESusc.edu/wp-content/uploads/2026/05/7-Bratislav…
1.08 s
IMAGESusc.edu/wp-content/uploads/2026/10/AdobeStock_…
1.07 s
IMAGESusc.edu/wp-content/uploads/2026/10/iStock-2215…
1.07 s
IMAGESusc.edu/wp-content/uploads/2026/04/9-Bratislav…
1.07 s
IMAGESusc.edu/wp-content/uploads/2026/10/iStock-2215…
1.07 s
IMAGESusc.edu/wp-content/uploads/2026/03/3-Bratislav…
1.07 s
IMAGESusc.edu/wp-content/uploads/2026/03/5-Bratislav…
1.06 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.instagram.com/embed.js 3rd partyjavascript2001.27 s22.4 KB
https://www.googletagmanager.com/gtag/js?id=GT-WRDGJJM 3rd partyjavascript2001.10 s179.5 KB
https://cdn-cookieyes.com/client_data/1b2030d678924bbc9332a40d/script.js 3rd partyjavascript2001.09 s8.6 KB
https://usc.edu/wp-content/uploads/2026/05/7-Bratislav_USC_Part-3-E28093-How-can-people-living-with-Alzheimers-and-caring-for-those-with-Alzheimers-thrive-E28093-Lead-1280x720.jpgimages2001.08 s106.1 KB
https://usc.edu/wp-content/uploads/2026/10/AdobeStock_312796093_uscn_6619-1280x720.jpgimages2001.07 s62.8 KB
https://usc.edu/wp-content/uploads/2026/10/iStock-2215510424-modified-39616577-1f51-495b-bfd4-76f63b2e62fd-1920x1080_uscn_8234-1280x720.jpgimages2001.07 s78.1 KB
https://usc.edu/wp-content/uploads/2026/04/9-Bratislav_USC_Part-4-E28093-How-are-AI-and-advanced-computing-are-accelerating-Alzheimers-research-E28093-Lead-320x180.jpgimages2001.07 s18.4 KB
https://usc.edu/wp-content/uploads/2026/10/iStock-2215510424-modified-39616577-1f51-495b-bfd4-76f63b2e62fd-1920x1080_uscn_8234-320x180.jpgimages2001.07 s9.4 KB
https://usc.edu/wp-content/uploads/2026/03/3-Bratislav_USC_Part-1-E28093-Can-we-beat-Alzheimers-disease-within-a-decade-E28093-Lead-1280x720.jpgimages2001.07 s135.5 KB
https://usc.edu/wp-content/uploads/2026/03/5-Bratislav_USC_Part-2-E28093-Understanding-Alzheimers-risk-and-resilience-E28093-Lead-320x180.jpgimages2001.06 s15.8 KB
https://usc.edu/wp-content/uploads/2026/10/AdobeStock_327066551_uscn_7200-320x180.jpgimages2001.06 s10.8 KB
https://usc.edu/wp-content/uploads/2026/04/9-Bratislav_USC_Part-4-E28093-How-are-AI-and-advanced-computing-are-accelerating-Alzheimers-research-E28093-Lead-1280x720.jpgimages2001.06 s141.5 KB
https://usc.edu/wp-content/uploads/2026/03/5-Bratislav_USC_Part-2-E28093-Understanding-Alzheimers-risk-and-resilience-E28093-Lead-1280x720.jpgimages2001.06 s121.2 KB
https://usc.edu/wp-content/uploads/2026/10/iStock-2251502866-1280x720.jpgimages2001.05 s95.9 KB
https://usc.edu/wp-content/uploads/2026/10/AdobeStock_327066551_uscn_7200-1280x720.jpgimages2001.05 s80.4 KB
https://usc.edu/wp-content/uploads/2026/05/7-Bratislav_USC_Part-3-E28093-How-can-people-living-with-Alzheimers-and-caring-for-those-with-Alzheimers-thrive-E28093-Lead-320x180.jpgimages2001.05 s14.2 KB
https://usc.edu/wp-content/uploads/2026/10/2026.08.06_Farzad-Pakdel_MD__Oph001_uscn_0207-1280x720.jpgimages2001.05 s52.9 KB
https://usc.edu/wp-content/uploads/2026/10/2026.08.06_Farzad-Pakdel_MD__Oph001_uscn_0207-320x180.jpgimages2001.05 s6.0 KB
https://usc.edu/wp-content/themes/usc-communications-2023/storybook-usc/dist/js/vendor/what-input.min.js?ver=23629c35f1f154d83dbf5ejavascript2001.05 s1.9 KB
https://usc.edu/wp-content/uploads/2026/10/AdobeStock_312796093_uscn_6619-320x180.jpgimages2001.05 s8.3 KB
https://usc.edu/wp-content/themes/usc-communications-2023/storybook-usc/dist/js/vendor/ally.min.js?ver=23629c35f1f154d83dbf5ejavascript2001.04 s26.4 KB
https://usc.edu/wp-content/uploads/2026/03/3-Bratislav_USC_Part-1-E28093-Can-we-beat-Alzheimers-disease-within-a-decade-E28093-Lead-320x180.jpgimages2001.04 s16.3 KB
https://usc.edu/wp-content/uploads/2026/10/iStock-2251502866-320x180.jpgimages2001.04 s9.7 KB
https://usc.edu/wp-content/themes/usc-communications-2023/storybook-usc/dist/js/vendor/jquery.once.min.js?ver=23629c35f1f154d83dbf5ejavascript2001.02 s445 B
https://usc.edu/wp-content/themes/usc-communications-2023/storybook-usc/dist/js/vendor/jquery.min.js?ver=23629c35f1f154d83dbf5ejavascript2001.02 s31.4 KB
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