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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
42
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

6.06 s

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

10.52 s

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

628 ms

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

0.000

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

7.58 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.

14.90 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
6.0 MB transferred, 86 requests
FIX
6.0 MB transferred, 86 requests
Critical::
Page weighs 8.2 MB (6.0 MB transferred)
Warning::
Images are 4.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.9 MB
Warning::
JavaScript is 756 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 756 KB
Info::
86 HTTP requests
Info::
Estimated 1.3 g CO2 per page load
6.0 MB / 2.4 MB budget
6.0 MB transferred
86 requests
1.3 g CO2 per page load
Images 4.9 MiB 81%
JavaScript 755.5 KiB 12%
CSS 198.3 KiB 3%
Fonts 116.8 KiB 2%
Other 37.2 KiB 1%
HTML 25.1 KiB 0%
Other 15.7 KiB 0%
Other 2.6 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

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

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 (6.0 MiB of 6.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4398ms total JS execution
FIX
4398ms total JS execution
Warning::
https://www.upc.edu/ca: 1282ms CPU time
Warning::
https://app.usercentrics.eu/browser-ui/3.99.0/inde...: 949ms CPU time
Warning::
Unattributable: 719ms CPU time
Warning::
https://www.upc.edu/++plone++production/++unique++...: 447ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-SR6Z...: 362ms CPU time
Warning::
Third-party scripts: 4398ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Style & Layout 24% Other 17% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.upc.edu/ca1282ms13ms4ms3rd
https://app.usercentrics.eu/browser-ui/3.99.0/index.module.js949ms768ms3ms3rd
Unattributable719ms90ms0ms3rd
https://www.upc.edu/++plone++production/++unique++2026-01-26T16:39:10.719273/default.js447ms286ms89ms3rd
https://www.googletagmanager.com/gtag/js?id=G-SR6Z9ZZ2SJ&cx=c&gtm=4e64k0362ms302ms58ms3rd
https://www.googletagmanager.com/gtag/js?id=G-P80Z250TEZ295ms231ms60ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js290ms248ms13ms3rd
https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.js54ms40ms13ms3rd
D
JS Bundles
Action
22 scripts, 299 KB unused
FIX
22 scripts, 299 KB unused
Warning::
https://www.upc.edu/++plone++production/++unique++...: 92 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.upc.edu/++plone++production/++unique++...: unminified — 20 KB could be saved
Warning::
https://www.googletagmanager.com/gtag/js?id=G-SR6Z...: 67 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-P80Z...: 62 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://app.usercentrics.eu/browser-ui/3.99.0/inde...: 53 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://app.usercentrics.eu/browser-ui/3.99.0/Virt...: 25 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 299 KB
299 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.upc.edu/++plone++production/++unique++2026-01-26T16:39:10.719273/default.js177 KB92 KB (54%)✗3rd
https://www.googletagmanager.com/gtag/js?id=G-SR6Z9ZZ2SJ&cx=c&gtm=4e64k0157 KB67 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-P80Z250TEZ155 KB62 KB (40%)✓3rd
https://app.usercentrics.eu/browser-ui/3.99.0/index.module.js121 KB53 KB (44%)✓3rd
https://app.usercentrics.eu/browser-ui/3.99.0/VirtualServiceItem-e4cab338.js49 KB25 KB (51%)✓3rd
https://app.usercentrics.eu/browser-ui/3.99.0/DefaultUI-4ed6068b-1cf25503.js1 KB—✓3rd
https://app.usercentrics.eu/browser-ui/3.99.0/ButtonsCustomization-eaf3a10e-db464fbf.js0 KB—✓3rd
https://www.upc.edu/++theme++homeupc/assets/javascripts/homeupc-compiled.js?version=2020-02-13%2000%3A00%3A00.00000312 KB—✓3rd
https://www.clarity.ms/tag/kmoetwnpkj1 KB—✓3rd
https://app.usercentrics.eu/browser-ui/3.99.0/DefaultData-3e2b2c3c-a6380bf2.js1 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
86 resources · 6.0 MB · 299 KB savings available
FIX
86 resources · 6.0 MB · 299 KB savings available
Warning::
Page weight 5.0 MB over 1MB target
Got: 6.0 MB Expected: ≤ 1 MB
Info::
~299 KB of savings available
Warning::
85 third-party resources (100% of weight)
Info::
4 resources over 200KB
86 resources · 6.0 MiB · 85 third-party 5.0 MiB over 1MB target
Image 82% · 4.9 MiB
JavaScript 12% · 755.5 KiB
CSS 3% · 198.3 KiB
Font 2% · 116.8 KiB
Document 0% · 25.4 KiB
Other 0% · 21.2 KiB

~298.9 KiB of savings available

Remove unused JavaScript: 298.9 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
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://www.upc.edu/ca/continguts-home/promocio/se... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.upc.edu/ca/continguts-home/promocio/la... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.upc.edu/ca/continguts-home/espai-multi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.upc.edu/++theme++homeupc/assets/images... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.upc.edu/ca/continguts-home/espai-multi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.upc.edu/ca/continguts-home/espai-multi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 4.9 MB
0 oversized -0 KB
31 legacy format
6 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

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
7 fonts (117 KB)
PASS
7 fonts (117 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

117 KB total

Render-blocking

0

of 7

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 FCP 6.1 s LCP 10.5 shttps://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOlCnqEu92Fr1MmEU9fBBc4.woff2KFOlCnqEu92Fr1MmEU9fBBc... https://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOlCnqEu92Fr1MmEU9fBBc4.woff2 — 17.2 KiB — 117 ms — font-display: swaphttps://www.upc.edu/++theme++homeupc/assets/fonts/upc-icones.ttf?40tf5eupc-icones.ttf https://www.upc.edu/++theme++homeupc/assets/fonts/upc-icones.ttf?40tf5e — 10.0 KiB — 207 ms — font-display: swaphttps://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOlCnqEu92Fr1MmSU5fBBc4.woff2KFOlCnqEu92Fr1MmSU5fBBc... https://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOlCnqEu92Fr1MmSU5fBBc4.woff2 — 17.0 KiB — 207 ms — font-display: swaphttps://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOlCnqEu92Fr1MmWUlfBBc4.woff2KFOlCnqEu92Fr1MmWUlfBBc... https://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOlCnqEu92Fr1MmWUlfBBc4.woff2 — 17.1 KiB — 207 ms — font-display: swapdata:application/font-woff2;base64,d09GMgABAAAAAEZsAA8AAAAAsVwAAEYJAAECTQAAAAAAAAAAAAAAAAAAAAAAAAAA…font-woff2;base64,d09GM... data:application/font-woff2;base64,d09GMgABAAAAAEZsAA8AAAAAsVwAAEYJAAECTQAAAAAAAAAAAAAAAAAAAAAAAAAA… — 17.6 KiB — 136 ms — font-display: swaphttps://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOjCnqEu92Fr1Mu51TjASc6CsQ.woff2KFOjCnqEu92Fr1Mu51TjASc... https://www.upc.edu/++theme++homeupc/assets/fonts/roboto/KFOjCnqEu92Fr1Mu51TjASc6CsQ.woff2 — 18.7 KiB — 106 ms — font-display: swaphttps://www.upc.edu/++theme++homeupc/assets/fonts/bootstrap/glyphicons-halflings-regular.woff2glyphicons-halflings-re... https://www.upc.edu/++theme++homeupc/assets/fonts/bootstrap/glyphicons-halflings-regular.woff2 — 19.2 KiB — 136 ms — font-display: swap
KFOlCnqEu92Fr1MmEU9fBBc... woff2 swap
Size 17 KB
Load time 117 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
upc-icones.ttf ttf swap
Size 10 KB
Load time 207 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
KFOlCnqEu92Fr1MmSU5fBBc... woff2 swap
Size 17 KB
Load time 207 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
KFOlCnqEu92Fr1MmWUlfBBc... woff2 swap
Size 17 KB
Load time 207 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
font-woff2;base64,d09GM... woff2 swap
Size 18 KB
Load time 136 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
KFOjCnqEu92Fr1Mu51TjASc... woff2 swap
Size 19 KB
Load time 106 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
glyphicons-halflings-re... woff2 swap
Size 19 KB
Load time 136 ms
Start 1.9 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)

Fixing the unchecked items could save ~3 KB and ~6 ms

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
7 hints, 0 missing preconnects
PASS
7 hints, 0 missing preconnects
Info::
Page uses 7 resource hint(s)

Current Resource Hints

preconnect
3
preload
2
dns-prefetch
2
prefetch
—

7 resource hints configured

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
86 requests over 4756ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 6.1 s LCP 10.5 shttps://upc.edu// https://upc.edu/ — 301 — 318 B — 426 ms — http/1.1https://www.upc.edu/www.upc.edu/ https://www.upc.edu/ — 301 — 1.8 KiB — 406 ms — http/1.1https://www.upc.edu/cawww.upc.edu/ca https://www.upc.edu/ca — 200 — 22.4 KiB — 195 ms — http/1.1https://app.usercentrics.eu/browser-ui/latest/loader.jsapp.usercentrics.eu/browser-ui/late... https://app.usercentrics.eu/browser-ui/latest/loader.js — 200 — 10.8 KiB — 35 ms — h2https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.jsprivacy-proxy.usercentrics.eu/lates... https://privacy-proxy.usercentrics.eu/latest/uc-block.bundle.js — 200 — 30.4 KiB — 44 ms — h2https://www.upc.edu/++plone++production/++unique++2026-01-26T16:39:10.719273/default.csswww.upc.edu/++plone++production/++u... https://www.upc.edu/++plone++production/++unique++2026-01-26T16:39:10.719273/default.css — 200 — 152.4 KiB — 441 ms — http/1.1https://www.upc.edu/++theme++homeupc/assets/css/homeupc-compiled.css?version=2020-02-13%2000%3A00%3A00.000003www.upc.edu/++theme++homeupc/assets... https://www.upc.edu/++theme++homeupc/assets/css/homeupc-compiled.css?version=2020-02-13%2000%3A00%3A00.000003 — 200 — 28.1 KiB — 384 ms — http/1.1https://www.upc.edu/++theme++homeupc/assets/css/upc.css?version=2026-01-26%2011%3A00%3A00www.upc.edu/++theme++homeupc/assets... https://www.upc.edu/++theme++homeupc/assets/css/upc.css?version=2026-01-26%2011%3A00%3A00 — 200 — 17.9 KiB — 387 ms — http/1.1https://www.upc.edu/++plone++production/++unique++2026-01-26T16:39:10.719273/default.jswww.upc.edu/++plone++production/++u... https://www.upc.edu/++plone++production/++unique++2026-01-26T16:39:10.719273/default.js — 200 — 176.9 KiB — 665 ms — http/1.1https://www.upc.edu/++theme++homeupc/assets/javascripts/homeupc-compiled.js?version=2020-02-13%2000%3A00%3A00.000003www.upc.edu/++theme++homeupc/assets... https://www.upc.edu/++theme++homeupc/assets/javascripts/homeupc-compiled.js?version=2020-02-13%2000%3A00%3A00.000003 — 200 — 11.7 KiB — 327 ms — http/1.1https://www.upc.edu/++theme++homeupc/assets/javascripts/upc.min.js?version=2023-07-18%2000%3A00%3A00.000001www.upc.edu/++theme++homeupc/assets... https://www.upc.edu/++theme++homeupc/assets/javascripts/upc.min.js?version=2023-07-18%2000%3A00%3A00.000001 — 200 — 3.0 KiB — 305 ms — http/1.1https://app.usercentrics.eu/browser-ui/3.99.0/index.module.jsapp.usercentrics.eu/browser-ui/3.99... https://app.usercentrics.eu/browser-ui/3.99.0/index.module.js — 200 — 120.7 KiB — 36 ms — h3https://api.usercentrics.eu/settings/k73tMWYfS/latest/languages.jsonapi.usercentrics.eu/settings/k73tMW... https://api.usercentrics.eu/settings/k73tMWYfS/latest/languages.json — 200 — 0 B — 128 ms — h2https://api.usercentrics.eu/settings/k73tMWYfS/latest/languages.jsonapi.usercentrics.eu/settings/k73tMW... https://api.usercentrics.eu/settings/k73tMWYfS/latest/languages.json — 200 — 599 B — 116 ms — h2https://www.upc.edu/++theme++homeupc/assets/images/Logo.svgwww.upc.edu/++theme++homeupc/assets... https://www.upc.edu/++theme++homeupc/assets/images/Logo.svg — 200 — 5.4 KiB — 99 ms — http/1.1https://www.upc.edu/ca/media/fons_destacat_menu_carbassa.jpg/@@images/d5176ec6-82bd-40fa-9f51-7bc6bba44b2d.jpegwww.upc.edu/ca/media/fons_destacat_... https://www.upc.edu/ca/media/fons_destacat_menu_carbassa.jpg/@@images/d5176ec6-82bd-40fa-9f51-7bc6bba44b2d.jpeg — 200 — 14.3 KiB — 96 ms — http/1.1https://api.usercentrics.eu/settings/k73tMWYfS/latest/ca.jsonapi.usercentrics.eu/settings/k73tMW... https://api.usercentrics.eu/settings/k73tMWYfS/latest/ca.json — 200 — 0 B — 110 ms — h3https://www.upc.edu/ca/media/fons_destacat_menu_blau.jpg/@@images/55782bcc-06e8-4f51-8079-ca3ccacc6777.jpegwww.upc.edu/ca/media/fons_destacat_... 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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 4398ms · 689KB · €48/mo
www.upc.edu
Other
Costly
Execution 1282ms
Transfer 22 KB
Monthly Cost €14/mo
app.usercentrics.eu
Other
Costly
Execution 949ms
Transfer 121 KB
Unused 44%
Monthly Cost €10/mo
Unattributable
Other
Costly
Execution 719ms
Transfer 0 KB
Monthly Cost €8/mo
www.upc.edu
Other
Costly
Execution 447ms
Transfer 177 KB
Unused 54%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 362ms
Transfer 157 KB
Unused 43%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 295ms
Transfer 155 KB
Unused 40%
Monthly Cost €3/mo
Microsoft Clarity
Session Replay
Costly
Execution 290ms
Transfer 26 KB
Monthly Cost €3/mo
privacy-proxy.usercentrics.eu
Other
Optional
Execution 54ms
Transfer 30 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.upc.edu adds 1282ms and costs ~€14/month
  • app.usercentrics.eu adds 949ms and costs ~€10/month
  • Unattributable adds 719ms and costs ~€8/month
  • www.upc.edu adds 447ms and costs ~€5/month
  • Google Tag Manager adds 362ms and costs ~€4/month
  • Google Tag Manager adds 295ms and costs ~€3/month
  • Microsoft Clarity adds 290ms and costs ~€3/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.upc.edu takes 1282ms 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

app.usercentrics.eu takes 949ms 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 719ms 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.upc.edu takes 447ms 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.upc.edu'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

Google Tag Manager takes 362ms 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

Google Tag Manager takes 295ms 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

Microsoft Clarity takes 290ms 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

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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