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https://www.colacem.com

Performance

· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
9
PASS
13
INFO
5

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

Mobile Desktop
62
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

3.12 s

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

15.62 s

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

192 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.

5.29 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.

15.62 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
28
13 PASS 9 REVIEW 1 FIX
D
Page Weight Budget
Action
2.5 MB transferred, 26 requests
FIX
2.5 MB transferred, 26 requests
Warning::
Page weighs 3.0 MB (2.5 MB transferred)
Warning::
Images are 2.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.2 MB
Info::
26 HTTP requests
Info::
Estimated 0.53 g CO2 per page load
2.5 MB / 2.4 MB budget
2.5 MB transferred
26 requests
0.53 g CO2 per page load
Images 2.2 MiB 88%
JavaScript 160.4 KiB 6%
Fonts 75.4 KiB 3%
CSS 54.8 KiB 2%
HTML 6.4 KiB 0%
Other 4.7 KiB 0%
Other 291 B 0%
Other 167 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

C
Image Optimization
Action
12 images, 0 KB saveable
REVIEW
12 images, 0 KB saveable
Warning::
https://www.colacem.com/media/files/865_4_Logo_Col... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.colacem.com/media/immagini/1291_n_ENER... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.colacem.com/img/map.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
12 images 2.2 MB
0 oversized -0 KB
12 legacy format
3 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

B
JS Execution Cost
959ms total JS execution
REVIEW
959ms total JS execution
Warning::
https://www.colacem.com/min/Layout_3_2405311332133...: 368ms CPU time
Info::
Unattributable: 235ms CPU time
Info::
https://www.colacem.com/js/vendor/jquery-2.1.1.min...: 164ms CPU time
Info::
https://cdn.matomo.cloud/colacem.matomo.cloud/cont...: 129ms CPU time
Info::
https://www.colacem.com/es/es: 62ms CPU time
Info::
Third-party scripts: 129ms (13% of total)

Main Thread Breakdown

Script Evaluation 39% Style & Layout 26% Other 26% Script Parsing & Compilation 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.colacem.com/min/Layout_3_2405311332133213.js368ms136ms17ms1st
Unattributable235ms20ms0ms1st
https://www.colacem.com/js/vendor/jquery-2.1.1.min.js164ms107ms8ms1st
https://cdn.matomo.cloud/colacem.matomo.cloud/container_aH7xjZRg.js129ms104ms24ms3rd
https://www.colacem.com/es/es62ms16ms3ms1st
B
JS Bundles
4 scripts, 67 KB unused
REVIEW
4 scripts, 67 KB unused
Warning::
https://www.colacem.com/min/Layout_3_2405311332133...: 39 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.matomo.cloud/colacem.matomo.cloud/cont...: 28 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 67 KB
67 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.colacem.com/min/Layout_3_2405311332133213.js58 KB39 KB (68%)✓1st
https://cdn.matomo.cloud/colacem.matomo.cloud/container_aH7xjZRg.js56 KB28 KB (51%)✓3rd
https://www.colacem.com/js/vendor/jquery-2.1.1.min.js37 KB—✓1st
https://www.colacem.com/min/Layout_2_2306130937503750.js10 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

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
Document Compression
Action
Document response served uncompressed
REVIEW
Document 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
26 resources · 2.5 MB · 67 KB savings available
REVIEW
26 resources · 2.5 MB · 67 KB savings available
Warning::
Page weight 2.5 MB exceeds 1 MB target by 1.5 MB
Got: 2.5 MB Expected: ≤ 1 MB
Info::
~67 KB of savings available
Info::
6 third-party resources (5% of weight)
Info::
1 resources over 200KB
26 resources · 2.5 MiB · 6 third-party 1.5 MiB over 1MB target
Image 89% · 2.2 MiB
JavaScript 6% · 160.4 KiB
Font 3% · 75.4 KiB
CSS 2% · 54.8 KiB
Document 0% · 6.4 KiB
Other 0% · 763 B

~67.4 KiB of savings available

Remove unused JavaScript: 67.4 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
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 (131.5 KiB of 2.5 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
3 fonts (75 KB)
PASS
3 fonts (75 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

75 KB total

Render-blocking

0

of 3

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 16.0 s FCP 3.1 s LCP 15.6 shttps://fonts.gstatic.com/s/lato/v11/1YwB1sO8YE1Lyjf12WNiUA.woff21YwB1sO8YE1Lyjf12WNiUA.... https://fonts.gstatic.com/s/lato/v11/1YwB1sO8YE1Lyjf12WNiUA.woff2 — 25.6 KiB — 145 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v11/H2DMvhDLycM56KNuAtbJYA.woff2H2DMvhDLycM56KNuAtbJYA.... https://fonts.gstatic.com/s/lato/v11/H2DMvhDLycM56KNuAtbJYA.woff2 — 25.0 KiB — 142 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v11/EsvMC5un3kjyUhB9ZEPPwg.woff2EsvMC5un3kjyUhB9ZEPPwg.... https://fonts.gstatic.com/s/lato/v11/EsvMC5un3kjyUhB9ZEPPwg.woff2 — 24.8 KiB — 152 ms — font-display: swap
1YwB1sO8YE1Lyjf12WNiUA.... woff2 swap
Size 26 KB
Load time 145 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
H2DMvhDLycM56KNuAtbJYA.... woff2 swap
Size 25 KB
Load time 142 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
EsvMC5un3kjyUhB9ZEPPwg.... woff2 swap
Size 25 KB
Load time 152 ms
Start 615 ms
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+
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 uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
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+
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
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
3 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
26 requests over 3520ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 3.1 s LCP 15.6 shttps://www.colacem.com// https://www.colacem.com/ — 301 — 305 B — 109 ms — h2https://www.colacem.com/es/es/es/es https://www.colacem.com/es/es — 200 — 6.4 KiB — 152 ms — h2https://www.colacem.com/min/Layout_0_2405311446344634.css/min/Layout_0_2405311446344634.css https://www.colacem.com/min/Layout_0_2405311446344634.css — 200 — 54.8 KiB — 159 ms — h2https://www.colacem.com/js/vendor/jquery-2.1.1.min.js/js/vendor/jquery-2.1.1.min.js https://www.colacem.com/js/vendor/jquery-2.1.1.min.js — 200 — 37.1 KiB — 133 ms — h2https://www.colacem.com/min/Layout_2_2306130937503750.js/min/Layout_2_2306130937503750.js https://www.colacem.com/min/Layout_2_2306130937503750.js — 200 — 10.0 KiB — 108 ms — h2https://www.colacem.com/img/close-lng.jpg/img/close-lng.jpg https://www.colacem.com/img/close-lng.jpg — 200 — 1.5 KiB — 54 ms — h2https://www.colacem.com/media/files/865_4_Logo_ColacemSpagna-bianco.png/media/files/865_4_Logo_ColacemSpag... https://www.colacem.com/media/files/865_4_Logo_ColacemSpagna-bianco.png — 200 — 9.3 KiB — 83 ms — h2https://www.colacem.com/img/search-w.png/img/search-w.png https://www.colacem.com/img/search-w.png — 200 — 1.3 KiB — 53 ms — h2https://www.colacem.com/media/immagini/1291_n_ENERGY%20sacco%20Cat%2042.5%20N%20210%20px.png/media/immagini/1291_n_ENERGY%20sac... https://www.colacem.com/media/immagini/1291_n_ENERGY%20sacco%20Cat%2042.5%20N%20210%20px.png — 200 — 71.3 KiB — 74 ms — h2https://www.colacem.com/img/map.png/img/map.png https://www.colacem.com/img/map.png — 200 — 31.7 KiB — 69 ms — h2https://www.colacem.com/min/Layout_3_2405311332133213.js/min/Layout_3_2405311332133213.js https://www.colacem.com/min/Layout_3_2405311332133213.js — 200 — 57.5 KiB — 62 ms — h2https://www.colacem.com/img/map-pin.png/img/map-pin.png https://www.colacem.com/img/map-pin.png — 200 — 1.5 KiB — 49 ms — h2https://cdn.matomo.cloud/colacem.matomo.cloud/container_aH7xjZRg.jscdn.matomo.cloud/colacem.matomo.clo... https://cdn.matomo.cloud/colacem.matomo.cloud/container_aH7xjZRg.js — 200 — 55.8 KiB — 152 ms — h2https://www.colacem.com/browserInfo.ashx?width=412&height=823&pxRatio=1.75/browserInfo.ashx?width=412&height=... https://www.colacem.com/browserInfo.ashx?width=412&height=823&pxRatio=1.75 — 200 — 167 B — 41 ms — h2https://www.colacem.com/img/ico-lang.png/img/ico-lang.png https://www.colacem.com/img/ico-lang.png — 200 — 3.0 KiB — 50 ms — h2https://www.colacem.com/media/immagini/542_n_colacem2.jpg/media/immagini/542_n_colacem2.jpg https://www.colacem.com/media/immagini/542_n_colacem2.jpg — 200 — 2.0 MiB — 403 ms — h2https://www.colacem.com/media/immagini/448_n_sostenibilita_home2.jpg/media/immagini/448_n_sostenibilita... https://www.colacem.com/media/immagini/448_n_sostenibilita_home2.jpg — 200 — 131.0 KiB — 77 ms — h2https://www.colacem.com/img/bg-h1.jpg/img/bg-h1.jpg https://www.colacem.com/img/bg-h1.jpg — 200 — 1.5 KiB — 100 ms — h2https://www.colacem.com/img/fb.png/img/fb.png https://www.colacem.com/img/fb.png — 200 — 1.3 KiB — 50 ms — h2https://fonts.gstatic.com/s/lato/v11/1YwB1sO8YE1Lyjf12WNiUA.woff2fonts.gstatic.com/s/lato/v11/1YwB1s... https://fonts.gstatic.com/s/lato/v11/1YwB1sO8YE1Lyjf12WNiUA.woff2 — 200 — 25.6 KiB — 145 ms — h3https://fonts.gstatic.com/s/lato/v11/H2DMvhDLycM56KNuAtbJYA.woff2fonts.gstatic.com/s/lato/v11/H2DMvh... https://fonts.gstatic.com/s/lato/v11/H2DMvhDLycM56KNuAtbJYA.woff2 — 200 — 25.0 KiB — 142 ms — h3https://fonts.gstatic.com/s/lato/v11/EsvMC5un3kjyUhB9ZEPPwg.woff2fonts.gstatic.com/s/lato/v11/EsvMC5... https://fonts.gstatic.com/s/lato/v11/EsvMC5un3kjyUhB9ZEPPwg.woff2 — 200 — 24.8 KiB — 152 ms — h3https://www.colacem.com/img/ajax-loader.gif/img/ajax-loader.gif https://www.colacem.com/img/ajax-loader.gif — 200 — 4.3 KiB — 48 ms — h2https://colacem.matomo.cloud/matomo.php?action_name=COLACEM%20-%20Producci%C3%B3n%20de%20cemento%20y%20ligantes%20hidr%C3%A1ulicos&idsite=1&rec=1&r=506009&h=14&m=39&s=50&url=https%3A%2F%2Fwww.colacem.com%2Fes%2Fes&_id=8e144a99b7f517fe&_idn=1&send_image=0&_refts=0&pv_id=2W1N9C&fa_pv=1&fa_fp[0][fa_vid]=Rxjn3D&fa_fp[0][fa_fv]=1&fa_fp[1][fa_vid]=yp7XzU&fa_fp[1][fa_fv]=1&pf_net=0&pf_srv=151&pf_tfr=0&pf_dm1=346&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not%20A(Brand%22%2C%22version%22%3A%2299.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22154.0.8037.92%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823colacem.matomo.cloud/matomo.php?act... https://colacem.matomo.cloud/matomo.php?action_name=COLACEM%20-%20Producci%C3%B3n%20de%20cemento%20y%20ligantes%20hidr%C3%A1ulicos&idsite=1&rec=1&r=506009&h=14&m=39&s=50&url=https%3A%2F%2Fwww.colacem.com%2Fes%2Fes&_id=8e144a99b7f517fe&_idn=1&send_image=0&_refts=0&pv_id=2W1N9C&fa_pv=1&fa_fp[0][fa_vid]=Rxjn3D&fa_fp[0][fa_fv]=1&fa_fp[1][fa_vid]=yp7XzU&fa_fp[1][fa_fv]=1&pf_net=0&pf_srv=151&pf_tfr=0&pf_dm1=346&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not%20A(Brand%22%2C%22version%22%3A%2299.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22154.0.8037.92%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823 — 204 — 146 B — 179 ms — h2https://www.colacem.com/favicon.ico?v=1.5/favicon.ico?v=1.5 https://www.colacem.com/favicon.ico?v=1.5 — 200 — 4.4 KiB — 41 ms — h2https://colacem.matomo.cloud/matomo.php?fa_vid=fZUUJl&fa_fv=1&ca=1&idsite=1&rec=1&r=415845&h=14&m=39&s=50&url=https%3A%2F%2Fwww.colacem.com%2Fes%2Fes&_id=8e144a99b7f517fe&_idn=0&send_image=0&_refts=0&pv_id=2W1N9C&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not%20A(Brand%22%2C%22version%22%3A%2299.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22154.0.8037.92%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823colacem.matomo.cloud/matomo.php?fa_... https://colacem.matomo.cloud/matomo.php?fa_vid=fZUUJl&fa_fv=1&ca=1&idsite=1&rec=1&r=415845&h=14&m=39&s=50&url=https%3A%2F%2Fwww.colacem.com%2Fes%2Fes&_id=8e144a99b7f517fe&_idn=0&send_image=0&_refts=0&pv_id=2W1N9C&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not%20A(Brand%22%2C%22version%22%3A%2299.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22154.0.8037.92%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823 — 204 — 145 B — 73 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
13% of JavaScript execution is third-party
First-party Third-party 129ms · 56KB · €1/mo
Matomo
Analytics
Optional
Execution 129ms
Transfer 56 KB
Unused 51%
Monthly Cost €1/mo

51% of Matomo'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

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 (2026-09-09 — 2026-10-06)

LCP (p75)

1488 ms

91% good

INP (p75)

85 ms

94% good

CLS (p75)

0.000

97% good

FCP (p75)

1007 ms

TTFB (p75)

593 ms

This origin passes Core Web Vitals assessment
Image Optimization
10 images, 121 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

10

Total Size

121 KB

8 missing alt text 10 missing dimensions 8 missing lazy loading
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