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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

11.44 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

13.92 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

116 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.005

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

16.30 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

17.50 s

Page Load Progression

1.9 s
3.8 s
5.6 s
7.5 s
9.4 s
11.3 s
13.1 s
15.0 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.4 MB transferred, 132 requests
FIX
3.4 MB transferred, 132 requests
Warning::
Page weighs 3.4 MB (3.4 MB transferred)
Warning::
Images are 2.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.4 MB
Info::
CSS is 396 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 396 KB
Warning::
132 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.70 g CO2 per page load
3.4 MB / 2.4 MB budget
3.4 MB transferred
132 requests
0.70 g CO2 per page load
Images 2.4 MiB 71%
JavaScript 484.4 KiB 14%
CSS 396.5 KiB 12%
Fonts 85.3 KiB 2%
HTML 19.3 KiB 1%
Other 1.7 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (3.4 MiB of 3.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3005ms total JS execution
FIX
3005ms total JS execution
Warning::
https://www.uniroma1.it/sites/default/files/js/js_...: 1084ms CPU time
Warning::
https://www.uniroma1.it/it/: 1071ms CPU time
Warning::
Unattributable: 664ms CPU time
Info::
https://www.uniroma1.it/sites/default/files/js/js_...: 187ms CPU time
Warning::
Third-party scripts: 3005ms (100% of total)

Main Thread Breakdown

Other 36% Style & Layout 26% Script Evaluation 24% Rendering 9%
ScriptTotalScriptingParse/CompileParty
https://www.uniroma1.it/sites/default/files/js/js_tr173tNWW2A1vvp5JmASPGVfECRtOfLyNyp-38oEYX0.js1084ms615ms11ms3rd
https://www.uniroma1.it/it/1071ms7ms6ms3rd
Unattributable664ms14ms0ms3rd
https://www.uniroma1.it/sites/default/files/js/js_f3Nfp_OSqooZcUvD7ceXPeRIjxSPr04ILU5aS05BCz4.js187ms99ms7ms3rd
D
JS Bundles
Action
11 scripts, 230 KB unused
FIX
11 scripts, 230 KB unused
Warning::
https://www.uniroma1.it/sites/default/files/js/js_...: 49 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uniroma1.it/sites/default/files/js/js_...: unminified — 21 KB could be saved
Warning::
https://www.uniroma1.it/sites/default/files/js/js_...: 49 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uniroma1.it/sites/default/files/js/js_...: unminified — 19 KB could be saved
Warning::
https://www.uniroma1.it/sites/default/files/js/js_...: 44 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ingestion.webanalytics.italia.it/matomo.js: 38 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.uniroma1.it/sites/all/themes/sapienza_...: 29 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 230 KB
230 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.uniroma1.it/sites/default/files/js/js_f3Nfp_OSqooZcUvD7ceXPeRIjxSPr04ILU5aS05BCz4.js91 KB49 KB (54%)✗3rd
https://www.uniroma1.it/sites/default/files/js/js_r4aPdznsjKgvtqACP6O-8IT40PlxTRJEtN0-weWYIss.js65 KB49 KB (76%)✗3rd
https://www.uniroma1.it/sites/default/files/js/js_tr173tNWW2A1vvp5JmASPGVfECRtOfLyNyp-38oEYX0.js130 KB44 KB (34%)✗3rd
https://ingestion.webanalytics.italia.it/matomo.js66 KB38 KB (59%)✓3rd
https://www.uniroma1.it/sites/all/themes/sapienza_bootstrap/bootstrap/js/bootstrap.min.js36 KB29 KB (82%)✓3rd
https://www.uniroma1.it/sites/default/files/js/js_9Rus79ChiI2hXGY4ky82J2TDHJZsnYE02SAHZrAw2QQ.js36 KB21 KB (59%)✓3rd
https://www.uniroma1.it/sites/default/files/js/js__LB7MEx17zs2MwO9QA_h_AuY2YN0SCaib7kNUb5hnvg.js4 KB—✓3rd
https://www.uniroma1.it/sites/default/files/js/js_FYWFIKatb9v1OxQnDak6_t2qpyRgubBQV9aUEHDeFb0.js41 KB—✗3rd
https://www.uniroma1.it/sites/default/files/js/js_v89jUZ_l2LR8NzEXW2kWQ6me12tC-jCbLw8O3mpuQ2A.js4 KB—✗3rd
https://www.uniroma1.it/sites/default/files/js/js_L50O_PWoAuMOxVjnzZCkNSSmI0kFwhZsO1_KS8WnGKw.js8 KB—✗3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

D
Page Weight Inventory
Action
132 resources · 3.4 MB · 230 KB savings available
FIX
132 resources · 3.4 MB · 230 KB savings available
Warning::
Page weight 2.4 MB over 1MB target
Got: 3.4 MB Expected: ≤ 1 MB
Info::
~230 KB of savings available
Warning::
131 third-party resources (100% of weight)
Info::
2 resources over 200KB
132 resources · 3.4 MiB · 131 third-party 2.4 MiB over 1MB target
Image 71% · 2.4 MiB
JavaScript 14% · 484.4 KiB
CSS 12% · 396.5 KiB
Font 2% · 85.3 KiB
Document 1% · 19.5 KiB

~230.1 KiB of savings available

Remove unused JavaScript: 230.1 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
64 images, 0 KB saveable
REVIEW
64 images, 0 KB saveable
Warning::
https://www.uniroma1.it/sites/default/files/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uniroma1.it/sites/default/files/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uniroma1.it/sites/default/files/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uniroma1.it/sites/default/files/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.uniroma1.it/sites/default/files/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
64 images 2.4 MB
0 oversized -0 KB
64 legacy format
5 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (85 KB)
PASS
5 fonts (85 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

85 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 11.4 s LCP 13.9 shttps://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-regular.woff2open-sans-v34-latin-reg... https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-regular.woff2 — 16.9 KiB — 362 ms — font-display: swaphttps://www.uniroma1.it/sites/all/themes/sapienza_bootstrap/bootstrap/fonts/glyphicons-halflings-regular.woff2glyphicons-halflings-re... https://www.uniroma1.it/sites/all/themes/sapienza_bootstrap/bootstrap/fonts/glyphicons-halflings-regular.woff2 — 18.1 KiB — 624 ms — font-display: swaphttps://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-300.woff2open-sans-v34-latin-300... https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-300.woff2 — 16.9 KiB — 799 ms — font-display: swaphttps://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-600.woff2open-sans-v34-latin-600... https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-600.woff2 — 16.9 KiB — 905 ms — font-display: swaphttps://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-700.woff2open-sans-v34-latin-700... https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/fonts/open-sans-v34-latin-700.woff2 — 16.5 KiB — 729 ms — font-display: swap
open-sans-v34-latin-reg... woff2 swap
Size 17 KB
Load time 362 ms
Start 5.7 s
Risk FOUT — text flashes from fallback to web font
glyphicons-halflings-re... woff2 swap
Size 18 KB
Load time 624 ms
Start 6.1 s
Risk FOUT — text flashes from fallback to web font
open-sans-v34-latin-300... woff2 swap
Size 17 KB
Load time 799 ms
Start 6.1 s
Risk FOUT — text flashes from fallback to web font
open-sans-v34-latin-600... woff2 swap
Size 17 KB
Load time 905 ms
Start 6.1 s
Risk FOUT — text flashes from fallback to web font
open-sans-v34-latin-700... woff2 swap
Size 17 KB
Load time 729 ms
Start 6.6 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
132 requests over 12747ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 11.4 s LCP 13.9 shttps://uniroma1.it// https://uniroma1.it/ — 301 — 195 B — 123 ms — http/1.1https://www.uniroma1.it/it/www.uniroma1.it/it/ https://www.uniroma1.it/it/ — 200 — 19.3 KiB — 182 ms — http/1.1https://www.uniroma1.it/sites/all/modules/uniroma1_infostud_login/css/spid-sp-access-button.min.csswww.uniroma1.it/sites/all/modules/u... https://www.uniroma1.it/sites/all/modules/uniroma1_infostud_login/css/spid-sp-access-button.min.css — 200 — 4.3 KiB — 63 ms — http/1.1https://www.uniroma1.it/modules/system/system.base.css?tds5hnwww.uniroma1.it/modules/system/syst... https://www.uniroma1.it/modules/system/system.base.css?tds5hn — 200 — 5.7 KiB — 200 ms — http/1.1https://www.uniroma1.it/sites/all/modules/jquery_update/replace/ui/themes/base/minified/jquery.ui.core.min.css?tds5hnwww.uniroma1.it/sites/all/modules/j... https://www.uniroma1.it/sites/all/modules/jquery_update/replace/ui/themes/base/minified/jquery.ui.core.min.css?tds5hn — 200 — 1.3 KiB — 261 ms — http/1.1https://www.uniroma1.it/sites/all/modules/jquery_update/replace/ui/themes/base/minified/jquery.ui.theme.min.css?tds5hnwww.uniroma1.it/sites/all/modules/j... https://www.uniroma1.it/sites/all/modules/jquery_update/replace/ui/themes/base/minified/jquery.ui.theme.min.css?tds5hn — 200 — 13.7 KiB — 434 ms — http/1.1https://www.uniroma1.it/sites/all/modules/jquery_update/replace/ui/themes/base/minified/jquery.ui.accordion.min.css?tds5hnwww.uniroma1.it/sites/all/modules/j... https://www.uniroma1.it/sites/all/modules/jquery_update/replace/ui/themes/base/minified/jquery.ui.accordion.min.css?tds5hn — 200 — 1.0 KiB — 459 ms — http/1.1https://www.uniroma1.it/sites/all/modules/ldap/ldap_user/ldap_user.css?tds5hnwww.uniroma1.it/sites/all/modules/l... https://www.uniroma1.it/sites/all/modules/ldap/ldap_user/ldap_user.css?tds5hn — 200 — 539 B — 560 ms — http/1.1https://www.uniroma1.it/sites/all/modules/calendar/css/calendar_multiday.css?tds5hnwww.uniroma1.it/sites/all/modules/c... https://www.uniroma1.it/sites/all/modules/calendar/css/calendar_multiday.css?tds5hn — 200 — 20.0 KiB — 701 ms — http/1.1https://www.uniroma1.it/sites/all/modules/date/date_api/date.css?tds5hnwww.uniroma1.it/sites/all/modules/d... https://www.uniroma1.it/sites/all/modules/date/date_api/date.css?tds5hn — 200 — 4.0 KiB — 761 ms — http/1.1https://www.uniroma1.it/sites/all/modules/date/date_popup/themes/datepicker.1.7.css?tds5hnwww.uniroma1.it/sites/all/modules/d... https://www.uniroma1.it/sites/all/modules/date/date_popup/themes/datepicker.1.7.css?tds5hn — 200 — 4.0 KiB — 861 ms — http/1.1https://www.uniroma1.it/modules/field/theme/field.css?tds5hnwww.uniroma1.it/modules/field/theme... https://www.uniroma1.it/modules/field/theme/field.css?tds5hn — 200 — 959 B — 959 ms — http/1.1https://www.uniroma1.it/modules/node/node.css?tds5hnwww.uniroma1.it/modules/node/node.c... https://www.uniroma1.it/modules/node/node.css?tds5hn — 200 — 552 B — 1.1 s — http/1.1https://www.uniroma1.it/sites/all/modules/sapienza_experts/css/experts.css?tds5hnwww.uniroma1.it/sites/all/modules/s... https://www.uniroma1.it/sites/all/modules/sapienza_experts/css/experts.css?tds5hn — 200 — 2.7 KiB — 1.2 s — http/1.1https://www.uniroma1.it/sites/all/modules/sapienza_phonebook/css/phonebook.css?tds5hnwww.uniroma1.it/sites/all/modules/s... https://www.uniroma1.it/sites/all/modules/sapienza_phonebook/css/phonebook.css?tds5hn — 200 — 2.8 KiB — 1.3 s — http/1.1https://www.uniroma1.it/sites/all/modules/sapienza_pnnr_block/css/pnnr-block.css?tds5hnwww.uniroma1.it/sites/all/modules/s... https://www.uniroma1.it/sites/all/modules/sapienza_pnnr_block/css/pnnr-block.css?tds5hn — 200 — 1.1 KiB — 1.4 s — http/1.1https://www.uniroma1.it/sites/all/modules/sapienza_yearbook/css/yearbook.css?tds5hnwww.uniroma1.it/sites/all/modules/s... https://www.uniroma1.it/sites/all/modules/sapienza_yearbook/css/yearbook.css?tds5hn — 200 — 2.8 KiB — 1.5 s — http/1.1https://www.uniroma1.it/sites/all/modules/uniroma1_2025/css/dashboard.css?tds5hnwww.uniroma1.it/sites/all/modules/u... https://www.uniroma1.it/sites/all/modules/uniroma1_2025/css/dashboard.css?tds5hn — 200 — 11.8 KiB — 1.7 s — http/1.1https://www.uniroma1.it/sites/all/modules/uniroma1_infostud_idm/css/uniroma1_infostud_idm.css?tds5hnwww.uniroma1.it/sites/all/modules/u... https://www.uniroma1.it/sites/all/modules/uniroma1_infostud_idm/css/uniroma1_infostud_idm.css?tds5hn — 200 — 789 B — 1.7 s — http/1.1https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/css/uniroma1_opensans.css?tds5hnwww.uniroma1.it/sites/all/modules/u... https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/css/uniroma1_opensans.css?tds5hn — 200 — 3.9 KiB — 1.8 s — http/1.1https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/css/font-awesome.min.css?tds5hnwww.uniroma1.it/sites/all/modules/u... https://www.uniroma1.it/sites/all/modules/uniroma1_opensans/css/font-awesome.min.css?tds5hn — 200 — 30.7 KiB — 2.0 s — http/1.1https://www.uniroma1.it/sites/all/modules/views/css/views.css?tds5hnwww.uniroma1.it/sites/all/modules/v... https://www.uniroma1.it/sites/all/modules/views/css/views.css?tds5hn — 200 — 1.1 KiB — 2.0 s — http/1.1https://www.uniroma1.it/sites/all/modules/cache_control/cache_control.css?tds5hnwww.uniroma1.it/sites/all/modules/c... https://www.uniroma1.it/sites/all/modules/cache_control/cache_control.css?tds5hn — 200 — 830 B — 2.1 s — http/1.1https://www.uniroma1.it/sites/all/modules/colorbox/styles/default/colorbox_style.css?tds5hnwww.uniroma1.it/sites/all/modules/c... https://www.uniroma1.it/sites/all/modules/colorbox/styles/default/colorbox_style.css?tds5hn — 200 — 5.1 KiB — 2.2 s — 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http/1.1https://www.uniroma1.it/sites/default/files/styles/275_200/public/immagine_appello_0.png?itok=g6IhEqAiwww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/275_200/public/immagine_appello_0.png?itok=g6IhEqAi — 200 — 85.5 KiB — 789 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/275_400/public/foto_laboratorio.jpeg?itok=jz-DmP4ewww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/275_400/public/foto_laboratorio.jpeg?itok=jz-DmP4e — 200 — 34.7 KiB — 448 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/275_400/public/laboratorio_ricerca_0.jpeg?itok=3oVuSQ5xwww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/275_400/public/laboratorio_ricerca_0.jpeg?itok=3oVuSQ5x — 200 — 35.9 KiB — 499 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/275_400/public/foto_pupille.jpeg?itok=gI_TdO7dwww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/275_400/public/foto_pupille.jpeg?itok=gI_TdO7d — 200 — 28.4 KiB — 699 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/275_400/public/lumaca_vampiro_mediterranea_2.jpg?itok=OB7qtgEswww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/275_400/public/lumaca_vampiro_mediterranea_2.jpg?itok=OB7qtgEs — 200 — 64.0 KiB — 538 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/565_400/public/bandiera-unione-europea-simbolo-eu-next-generation-pnrr.jpg?itok=WxcWBEicwww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/565_400/public/bandiera-unione-europea-simbolo-eu-next-generation-pnrr.jpg?itok=WxcWBEic — 200 — 18.9 KiB — 588 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/565_400/public/logo_civis_new.png?itok=tF5xJpXdwww.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/565_400/public/logo_civis_new.png?itok=tF5xJpXd — 200 — 25.2 KiB — 572 ms — http/1.1https://www.uniroma1.it/sites/default/files/styles/565_200/public/31542481691_59e10b596b_o.jpg?itok=su3u24Z9www.uniroma1.it/sites/default/files... https://www.uniroma1.it/sites/default/files/styles/565_200/public/31542481691_59e10b596b_o.jpg?itok=su3u24Z9 — 200 — 108.2 KiB — 501 ms — http/1.1https://www.uniroma1.it/favicon.icowww.uniroma1.it/favicon.ico https://www.uniroma1.it/favicon.ico — 200 — 1.5 KiB — 42 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3005ms · 240KB · €33/mo
www.uniroma1.it
Other
Costly
Execution 1084ms
Transfer 130 KB
Unused 34%
Monthly Cost €12/mo
www.uniroma1.it
Other
Costly
Execution 1071ms
Transfer 19 KB
Monthly Cost €12/mo
Unattributable
Other
Costly
Execution 664ms
Transfer 0 KB
Monthly Cost €7/mo
www.uniroma1.it
Other
Optional
Execution 187ms
Transfer 91 KB
Unused 54%
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • www.uniroma1.it adds 1084ms and costs ~€12/month
  • www.uniroma1.it adds 1071ms and costs ~€12/month
  • Unattributable adds 664ms and costs ~€7/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.uniroma1.it takes 1084ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.uniroma1.it takes 1071ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 664ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

54% of www.uniroma1.it's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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