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https://web.gencat.cat

Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
2
REVIEW
7
PASS
10
INFO
4

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

Mobile Desktop
85
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
100
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.

413 ms

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

2.53 s

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

83 ms

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

0.002

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

1.43 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.

3.06 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
23
10 PASS 7 REVIEW 2 FIX
F
Page Weight Budget
Action
20.6 MB transferred, 94 requests
FIX
20.6 MB transferred, 94 requests
Critical::
Page weighs 23.5 MB (20.6 MB transferred)
Warning::
Images are 19.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 19.4 MB
Warning::
JavaScript is 731 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 731 KB
Info::
Fonts are 328 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 328 KB
Info::
94 HTTP requests
Info::
Estimated 4.3 g CO2 per page load
20.6 MB / 2.4 MB budget
20.6 MB transferred
94 requests
4.3 g CO2 per page load
Images 19.4 MiB 94%
JavaScript 731.4 KiB 3%
Fonts 328.0 KiB 2%
Other 112.0 KiB 1%
CSS 98.2 KiB 0%
HTML 19.4 KiB 0%
Other 1.0 KiB 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

D
JS Bundles
Action
26 scripts, 390 KB unused
FIX
26 scripts, 390 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/w_Yb7dG...: 234 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web.gencat.cat/etc.clientlibs/aem-gencat-f...: 83 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web.gencat.cat/etc.clientlibs/aem-gencat-f...: 27 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://gencat.containers.piwik.pro/eb50131d-1482-...: 24 KB unused (16%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web.gencat.cat/etc.clientlibs/clientlibs/g...: 22 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 390 KB
390 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/w_Yb7dGGXaKesJ7BMiqFJqBG/recaptcha__en.js333 KB234 KB (71%)✓3rd
https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site.lc-60432f6de6117f8e7c41a50c8bad73cf-lc.min.js92 KB83 KB (90%)✓1st
https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-card.lc-2fb9a0acf3b11a6d3de80bfc3ca893fd-lc.min.js42 KB27 KB (63%)✓1st
https://gencat.containers.piwik.pro/eb50131d-1482-4c39-a0fa-835d5e4dacd6.js150 KB24 KB (16%)✓3rd
https://web.gencat.cat/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js35 KB22 KB (63%)✓1st
https://web.gencat.cat/etc.clientlibs/clientlibs/granite/jquery/granite/csrf.lc-652a558c3774088b61b0530c184710d1-lc.min.js2 KB—✓1st
https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-banner.lc-e0547c1b8a2b0ef31e2d19d6e8b96839-lc.min.js1 KB—✓1st
https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/main.lc-690ba627a9a2eeef0733ede272cf726b-lc.min.js3 KB—✓1st
https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-header.lc-04f15c9e9d8cb243ec6923624668732a-lc.min.js1 KB—✓1st
https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-menu-horizontal.lc-b716771a8f7494b322fa189a6538623d-lc.min.js6 KB—✓1st

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

C
Image Optimization
Action
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
https://web.gencat.cat/content/dam/webgencat/icone... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web.gencat.cat/content/dam/webgencat/icone... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web.gencat.cat/content/dam/webgencat/icone... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web.gencat.cat/content/dam/webgencat/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web.gencat.cat/content/dam/webgencat/icone... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42 images 19.4 MB
0 oversized -0 KB
35 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

B
JS Execution Cost
663ms total JS execution
REVIEW
663ms total JS execution
Warning::
https://gencat.containers.piwik.pro/eb50131d-1482-...: 380ms CPU time
Info::
Unattributable: 171ms CPU time
Info::
https://web.gencat.cat/ca/inici: 112ms CPU time
Warning::
Third-party scripts: 380ms (57% of total)

Main Thread Breakdown

Script Evaluation 41% Other 24% Script Parsing & Compilation 18% Style & Layout 12%
ScriptTotalScriptingParse/CompileParty
https://gencat.containers.piwik.pro/eb50131d-1482-4c39-a0fa-835d5e4dacd6.js380ms245ms113ms3rd
Unattributable171ms1ms0ms1st
https://web.gencat.cat/ca/inici112ms2ms1ms1st
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Page Weight Inventory
Action
94 resources · 20.6 MB · 390 KB savings available
REVIEW
94 resources · 20.6 MB · 390 KB savings available
Warning::
Page weight 20.6 MB exceeds 1 MB target by 19.6 MB
Got: 20.6 MB Expected: ≤ 1 MB
Info::
~390 KB of savings available
Info::
11 third-party resources (5% of weight)
Info::
12 resources over 200KB
94 resources · 20.6 MiB · 11 third-party 19.6 MiB over 1MB target
Image 94% · 19.4 MiB
JavaScript 3% · 731.4 KiB
Font 2% · 328.0 KiB
Other 1% · 112.0 KiB
CSS 0% · 98.2 KiB
Document 0% · 20.2 KiB

~389.6 KiB of savings available

Remove unused JavaScript: 389.6 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
5% third-party, 0 ms blocking
PASS
5% third-party, 0 ms blocking
Info::
Third-party code accounts for 5% of page weight (1.1 MiB of 20.6 MiB)
Info::
Third-party blocking time is low (0 ms)
95%
First-party Third-party
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
4 fonts (328 KB)
PASS
4 fonts (328 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

328 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 413 ms LCP 2.5 shttps://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/open-sans/OpenSans-Regular.ttfOpenSans-Regular.ttf https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/open-sans/OpenSans-Regular.ttf — 76.9 KiB — 120 ms — font-display: swaphttps://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/open-sans/OpenSans-SemiBold.ttfOpenSans-SemiBold.ttf https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/open-sans/OpenSans-SemiBold.ttf — 76.9 KiB — 89 ms — font-display: swaphttps://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/bootstrap-icons/bootstrap-icons.woffbootstrap-icons.woff https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/bootstrap-icons/bootstrap-icons.woff — 171.5 KiB — 90 ms — font-display: swaphttps://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/material-icons/icomoon.ttficomoon.ttf https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site/resources/fonts/material-icons/icomoon.ttf — 2.8 KiB — 35 ms — font-display: swap
OpenSans-Regular.ttf ttf swap
Size 77 KB
Load time 120 ms
Start 115 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
OpenSans-SemiBold.ttf ttf swap
Size 77 KB
Load time 89 ms
Start 166 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
bootstrap-icons.woff woff swap
Size 171 KB
Load time 90 ms
Start 167 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
icomoon.ttf ttf swap
Size 3 KB
Load time 35 ms
Start 319 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~184 KB and ~368 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=300 (≤ 5min) is appropriate
PASS
Main HTML max-age=300 (≤ 5min) is appropriate
Info::
Main HTML max-age=300 (≤ 5min) is appropriate
Got: max-age=300
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=300

DirectiveValueMeaning
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
94 requests over 775ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 413 ms LCP 2.5 shttps://web.gencat.cat// https://web.gencat.cat/ — 301 — 455 B — 7 ms — h2https://web.gencat.cat/ca/ca https://web.gencat.cat/ca — 302 — 197 B — 3 ms — h2https://web.gencat.cat/ca/inici.html/ca/inici.html https://web.gencat.cat/ca/inici.html — 301 — 108 B — 2 ms — h2https://web.gencat.cat/ca/inici/ca/inici https://web.gencat.cat/ca/inici — 200 — 19.4 KiB — 3 ms — h2https://web.gencat.cat/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js/.rum/@adobe/helix-rum-js@%5E2/dist... https://web.gencat.cat/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js — 200 — 979 B — 42 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-base.lc-3c3f5dd55b9ba40f3a512eeabe9e111c-lc.min.css/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-base.lc-3c3f5dd55b9ba40f3a512eeabe9e111c-lc.min.css — 200 — 7.9 KiB — 27 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js — 200 — 71 B — 35 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 71 B — 24 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site.lc-d631042a02732f1ad571bd4d8f5a8813-lc.min.css/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-site.lc-d631042a02732f1ad571bd4d8f5a8813-lc.min.css — 200 — 38.7 KiB — 42 ms — h2https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/main.lc-b4994788cf1eaeed300a0aa7af53f3c8-lc.min.css/etc.clientlibs/foundation/clientli... https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/main.lc-b4994788cf1eaeed300a0aa7af53f3c8-lc.min.css — 200 — 1.9 KiB — 26 ms — h2https://web.gencat.cat/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js/etc.clientlibs/clientlibs/granite/... https://web.gencat.cat/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js — 200 — 35.4 KiB — 42 ms — h2https://web.gencat.cat/etc.clientlibs/clientlibs/granite/utils.lc-e7bf340a353e643d198b25d0c8ccce47-lc.min.js/etc.clientlibs/clientlibs/granite/... https://web.gencat.cat/etc.clientlibs/clientlibs/granite/utils.lc-e7bf340a353e643d198b25d0c8ccce47-lc.min.js — 200 — 3.5 KiB — 36 ms — h2https://web.gencat.cat/etc.clientlibs/clientlibs/granite/jquery/granite.lc-543d214c88dfa6f4a3233b630c82d875-lc.min.js/etc.clientlibs/clientlibs/granite/... https://web.gencat.cat/etc.clientlibs/clientlibs/granite/jquery/granite.lc-543d214c88dfa6f4a3233b630c82d875-lc.min.js — 200 — 1.7 KiB — 33 ms — h2https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/jquery.lc-dd9b395c741ce2784096e26619e14910-lc.min.js/etc.clientlibs/foundation/clientli... https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/jquery.lc-dd9b395c741ce2784096e26619e14910-lc.min.js — 200 — 97 B — 24 ms — h2https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/shared.lc-41f79c8a45bb1766981ec4ca82d7e0e6-lc.min.js/etc.clientlibs/foundation/clientli... https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/shared.lc-41f79c8a45bb1766981ec4ca82d7e0e6-lc.min.js — 200 — 6.8 KiB — 19 ms — h2https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/main.lc-690ba627a9a2eeef0733ede272cf726b-lc.min.js/etc.clientlibs/foundation/clientli... https://web.gencat.cat/etc.clientlibs/foundation/clientlibs/main.lc-690ba627a9a2eeef0733ede272cf726b-lc.min.js — 200 — 3.5 KiB — 28 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-menu-horizontal.lc-1fa3d1ef06c6a4dcabbf65d19ee928a6-lc.min.css/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-menu-horizontal.lc-1fa3d1ef06c6a4dcabbf65d19ee928a6-lc.min.css — 200 — 7.9 KiB — 37 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-tabs.lc-0ad804478fd84c2e894127b9d7390d07-lc.min.css/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-tabs.lc-0ad804478fd84c2e894127b9d7390d07-lc.min.css — 200 — 3.8 KiB — 21 ms — h2https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-header.lc-9734a07f0b5ef1d3119ec79e68fa9904-lc.min.css/etc.clientlibs/aem-gencat-framewor... https://web.gencat.cat/etc.clientlibs/aem-gencat-framework/clientlibs/clientlib-component/clientlib-header.lc-9734a07f0b5ef1d3119ec79e68fa9904-lc.min.css — 200 — 2.8 KiB — 18 ms — h2https://web.gencat.cat/content/dam/webgencat/logos/generalitat.png/content/dam/webgencat/logos/genera... https://web.gencat.cat/content/dam/webgencat/logos/generalitat.png — 200 — 19.8 KiB — 25 ms — h2https://web.gencat.cat/content/dam/webgencat/logos/Isologotip.svg/content/dam/webgencat/logos/Isolog... https://web.gencat.cat/content/dam/webgencat/logos/Isologotip.svg — 200 — 12.9 KiB — 35 ms — h2https://web.gencat.cat/content/dam/webgencat/imatges-i-fotografies/ciutadania/serveis-i-tramits/imatges-de-recurs/imatge-quiosc.jpg/content/dam/webgencat/imatges-i-fo... https://web.gencat.cat/content/dam/webgencat/imatges-i-fotografies/ciutadania/serveis-i-tramits/imatges-de-recurs/imatge-quiosc.jpg — 200 — 1.2 MiB — 49 ms — h2https://web.gencat.cat/content/dam/webgencat/imatges-i-fotografies/ciutadania/actualitat/not%C3%ADcies/2026/04/20260421_gent.jpg/content/dam/webgencat/imatges-i-fo... https://web.gencat.cat/content/dam/webgencat/imatges-i-fotografies/ciutadania/actualitat/not%C3%ADcies/2026/04/20260421_gent.jpg — 200 — 151.1 KiB — 6 ms — h2https://web.gencat.cat/content/dam/webgencat/imatges-i-fotografies/entitats/Portada-entitats.png/content/dam/webgencat/imatges-i-fo... https://web.gencat.cat/content/dam/webgencat/imatges-i-fotografies/entitats/Portada-entitats.png — 200 — 116.8 KiB — 27 ms — 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h2https://delivery-p145193-e1493330.adobeaemcloud.com/adobe/assets/urn:aaid:aem:e522e1ca-b1ea-4301-bdd4-f7120ecf66d9/as/vehicle-multioperador.jpg?smartcrop=Rectangular-4-3delivery-p145193-e1493330.adobeaemc... https://delivery-p145193-e1493330.adobeaemcloud.com/adobe/assets/urn:aaid:aem:e522e1ca-b1ea-4301-bdd4-f7120ecf66d9/as/vehicle-multioperador.jpg?smartcrop=Rectangular-4-3 — 200 — 76.6 KiB — 107 ms — h2https://delivery-p145193-e1493330.adobeaemcloud.com/adobe/assets/urn:aaid:aem:688da02f-02f5-4452-a89a-9b0660d37798/as/passatger-terminal.jpg?smartcrop=Rectangular-4-3delivery-p145193-e1493330.adobeaemc... https://delivery-p145193-e1493330.adobeaemcloud.com/adobe/assets/urn:aaid:aem:688da02f-02f5-4452-a89a-9b0660d37798/as/passatger-terminal.jpg?smartcrop=Rectangular-4-3 — 200 — 32.2 KiB — 107 ms — 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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
57% of JavaScript execution is third-party
First-party Third-party 380ms · 150KB · €4/mo
gencat.containers.piwik.pro
Other
Costly
Execution 380ms
Transfer 150 KB
Unused 16%
Monthly Cost €4/mo

These scripts may cost more than they're worth

  • gencat.containers.piwik.pro adds 380ms and costs ~€4/month

57% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

gencat.containers.piwik.pro takes 380ms 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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-07-12 — 2026-08-08)

LCP (p75)

1375 ms

90% good

INP (p75)

281 ms

62% good

CLS (p75)

0.050

84% good

FCP (p75)

786 ms

TTFB (p75)

329 ms

Image Optimization
49 images, 22696 KB total, 19 KB wasted
INFO

Image Optimization Audit

Total Images

49

Total Size

22696 KB

Oversized

1

Wasted

19 KB

48 missing dimensions 45 missing lazy loading
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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