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https://ajuntament.barcelona.cat/mercats/es/los-mercados/mercats-un-clic

Performance

· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
5
PASS
14
INFO
3

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
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.

589 ms

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

900 ms

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

0 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.

711 ms

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

904 ms

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
14 PASS 5 REVIEW 1 FIX
D
Third-Party Impact
Action
69% third-party, 0 ms blocking
FIX
69% third-party, 0 ms blocking
Warning::
Third-party code accounts for 69% of page weight (507.0 KiB of 734.6 KiB)
Info::
Third-party blocking time is low (0 ms)
31%
69%
First-party Third-party
C
Image Optimization
Action
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
https://www.barcelona.cat/assets/images/brand/bann... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ajuntament.barcelona.cat/mercats/modules/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.barcelona.cat/assetsdi/img/2025/logo-n... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.lawwwing.com/media/widgets/brands/2ef9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 189 KB
0 oversized -0 KB
14 legacy format
4 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

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.
B
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
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
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
735 KB transferred, 48 requests
PASS
735 KB transferred, 48 requests
Info::
Page weighs 2.1 MB (735 KB transferred)
Info::
Fonts are 228 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 228 KB
Info::
48 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
735 KB / 2.4 MB budget
735 KB transferred
48 requests
0.15 g CO2 per page load
Fonts 228.3 KiB 31%
JavaScript 190.0 KiB 26%
Images 189.2 KiB 26%
CSS 98.5 KiB 13%
HTML 14.4 KiB 2%
Other 12.4 KiB 2%
Other 1.2 KiB 0%
Other 573 B 0%
Other 0 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

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

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+
JS Execution Cost
204ms total JS execution
PASS
204ms total JS execution
Info::
https://ajuntament.barcelona.cat/mercats/es/los-me...: 90ms CPU time
Info::
Unattributable: 61ms CPU time
Info::
https://ajuntament.barcelona.cat/mercats/sites/def...: 53ms CPU time

Main Thread Breakdown

Style & Layout 31% Other 26% Script Evaluation 26% Parse HTML & CSS 7% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://ajuntament.barcelona.cat/mercats/es/los-mercados/mercats-un-clic90ms1ms0ms1st
Unattributable61ms2ms0ms1st
https://ajuntament.barcelona.cat/mercats/sites/default/files/js/js_NihaZ83Q_yEbJnv9XKECI7AFEMJcXRH3DJ86_1xpkls.js?scope=footer&delta=1&language=es&theme=minerva_subtheme&include=eJx1jkEOAjEIRS80zdzCnWeYQCW1SQsNUKO3t446ixp38F4-fIy8IajCit9pwV-20d1JGcpSM5PeYKvEfU1FcGafJZzHchIZscNbR79SpTV2c6nB_FEyp8O_JY6QuUKb-IXMIYLbxBMU0gwh815xtnvFP6-aSpUQocXXjTk6OrBlz8L2BPlYdEk53ms26ms5ms1st
A+
Font Loading
6 fonts (228 KB)
PASS
6 fonts (228 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

228 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 589 ms LCP 900 mshttps://www.barcelona.cat/assetsdi/icoajuntament-v2/fonts/icoajuntament-v2.ttf?4n8bjkicoajuntament-v2.ttf https://www.barcelona.cat/assetsdi/icoajuntament-v2/fonts/icoajuntament-v2.ttf?4n8bjk — 92.1 KiB — 38 ms — font-display: swaphttps://www.barcelona.cat/assets/fonts/SourceSansPro/6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu.woff26xKydSBYKcSV-LCoeQqfX1R... https://www.barcelona.cat/assets/fonts/SourceSansPro/6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu.woff2 — 13.2 KiB — 20 ms — font-display: swaphttps://www.barcelona.cat/assets/fonts/SourceSansPro/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7l.woff26xK3dSBYKcSV-LCoeQqfX1R... https://www.barcelona.cat/assets/fonts/SourceSansPro/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7l.woff2 — 13.2 KiB — 31 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesans3/v20/nwpStKy2OAdR1K-IwhWudF-R3w8aZejf5Hc.woff2nwpStKy2OAdR1K-IwhWudF-... https://fonts.gstatic.com/s/sourcesans3/v20/nwpStKy2OAdR1K-IwhWudF-R3w8aZejf5Hc.woff2 — 28.2 KiB — 136 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesans3/v20/nwpMtKy2OAdR1K-IwhWudF-R3woqZ-LYxnV18A.woff2nwpMtKy2OAdR1K-IwhWudF-... https://fonts.gstatic.com/s/sourcesans3/v20/nwpMtKy2OAdR1K-IwhWudF-R3woqZ-LYxnV18A.woff2 — 27.8 KiB — 128 ms — font-display: swaphttps://www.barcelona.cat/assetsdi/icoajuntament/fonts/icoajuntament.ttf?8aaig7icoajuntament.ttf https://www.barcelona.cat/assetsdi/icoajuntament/fonts/icoajuntament.ttf?8aaig7 — 53.8 KiB — 31 ms — font-display: swap
icoajuntament-v2.ttf ttf swap
Size 92 KB
Load time 38 ms
Start 241 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 13 KB
Load time 20 ms
Start 241 ms
Risk FOUT — text flashes from fallback to web font
6xK3dSBYKcSV-LCoeQqfX1R... woff2 swap
Size 13 KB
Load time 31 ms
Start 241 ms
Risk FOUT — text flashes from fallback to web font
nwpStKy2OAdR1K-IwhWudF-... woff2 swap
Size 28 KB
Load time 136 ms
Start 242 ms
Risk FOUT — text flashes from fallback to web font
nwpMtKy2OAdR1K-IwhWudF-... woff2 swap
Size 28 KB
Load time 128 ms
Start 247 ms
Risk FOUT — text flashes from fallback to web font
icoajuntament.ttf ttf swap
Size 54 KB
Load time 31 ms
Start 248 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 ~44 KB and ~88 ms

A+
JS Bundles
11 scripts, 42 KB unused
PASS
11 scripts, 42 KB unused
Warning::
https://ajuntament.barcelona.cat/mercats/sites/def...: 42 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 42 KB
42 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ajuntament.barcelona.cat/mercats/sites/default/files/js/js_NihaZ83Q_yEbJnv9XKECI7AFEMJcXRH3DJ86_1xpkls.js?scope=footer&delta=1&language=es&theme=minerva_subtheme&include=eJx1jkEOAjEIRS80zdzCnWeYQCW1SQsNUKO3t446ixp38F4-fIy8IajCit9pwV-20d1JGcpSM5PeYKvEfU1FcGafJZzHchIZscNbR79SpTV2c6nB_FEyp8O_JY6QuUKb-IXMIYLbxBMU0gwh815xtnvFP6-aSpUQocXXjTk6OrBlz8L2BPlYdEk59 KB42 KB (72%)✓1st
https://www.barcelona.cat/assets/core/javascripts/core.js20 KB—✓3rd
https://ajuntament.barcelona.cat/mercats/core/assets/vendor/jquery/jquery.min.js?v=4.0.027 KB—✓1st
https://www.youtube.com/iframe_api14 KB—✓3rd
https://player.vimeo.com/api/player.js9 KB—✓3rd
https://plausible.io/js/pa-TRenRSJchypQBtDDwovxf.js3 KB—✓3rd
https://cdn.lawwwing.com/widgets/current/2ef97148-3d5b-4609-a816-113e25c232d8/cookie-widget.min.js2 KB—✓3rd
https://ajuntament.barcelona.cat/widgets/bcn-avisos/js/v1/bcn-avisos.js3 KB—✓1st
https://www.youtube.com/s/player/a5c2aafe/www-widgetapi.vflset/www-widgetapi.js9 KB—✓3rd
https://cdn.lawwwing.com/widgets/current/2ef97148-3d5b-4609-a816-113e25c232d8/lawwwing-core.js40 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

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
Asset Compression
1 of 2 asset hosts still on gzip
PASS
1 of 2 asset hosts still on gzip
Info::
www.barcelona.cat serves assets with gzip; brotli would be ~20% smaller (assets: 24)
Every current browser accepts brotli. On a CDN this is a per-pull-zone toggle (Cloudflare, Fastly, CloudFront, CDN77, Bunny all expose it); on an origin it needs the brotli module (nginx-brotli, Apache mod_brotli). The saving lands on the assets this host serves, not on the HTML document -- the document's own encoding is reported separately.
Got: www.barcelona.cat (text/css)
Info::
cdn.lawwwing.com serves assets with brotli (assets: 6)
Got: cdn.lawwwing.com (application/javascript)
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, public
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Cookie,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::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A
Page Weight Inventory
48 resources · 735 KB · 42 KB savings available
PASS
48 resources · 735 KB · 42 KB savings available
Info::
Within 1MB page-weight target
Got: 735 KB
Warning::
38 third-party resources (69% of weight)
48 resources · 734.6 KiB · 38 third-party Within 1MB page-weight target
Font 31% · 228.3 KiB
Image 26% · 190.4 KiB
JavaScript 26% · 190.0 KiB
CSS 13% · 98.5 KiB
Document 2% · 14.4 KiB
Other 2% · 13.0 KiB

~42.1 KiB of savings available

Remove unused JavaScript: 42.1 KiB
A+
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: max-age=300, public
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=300, public

DirectiveValueMeaning
max-age300Cache for 5 minutes
public—Any cache may store this response
Effective TTL: 300 seconds
Network Waterfall
48 requests over 469ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 589 ms LCP 900 mshttps://ajuntament.barcelona.cat/mercats/es/los-mercados/mercats-un-clic/mercats/es/los-mercados/mercats-un... https://ajuntament.barcelona.cat/mercats/es/los-mercados/mercats-un-clic — 200 — 14.4 KiB — 11 ms — h2https://www.barcelona.cat/assets/core/stylesheets/core.csswww.barcelona.cat/assets/core/style... https://www.barcelona.cat/assets/core/stylesheets/core.css — 200 — 14.3 KiB — 32 ms — h2https://ajuntament.barcelona.cat/mercats/sites/default/files/css/css_7d-HOhHe9R-LKSuPSYmZPaF8WejcLBQJ2Eb8OTAayqE.css?delta=1&language=es&theme=minerva_subtheme&include=eJx1jtEKwjAMRX-oWx_8oJJ0Yau2SWnS6f7eoahQ8OUSziGXi5EDQmvg8XMFehg1huxKYmo7BO1oGxXysatJmdSOnHj9-rdEEVNrUAcepfNZONA1C0L-U5WiTHA936AQ2yA1p3gbmfQWKSiwhsvg7nBUSWzqKjRYz4Gb-qX1Cnn-kblz7ZiTbrQ4PdSoeAQltye6q3_lXGTpmZ6zeXnU/mercats/sites/default/files/css/cs... https://ajuntament.barcelona.cat/mercats/sites/default/files/css/css_7d-HOhHe9R-LKSuPSYmZPaF8WejcLBQJ2Eb8OTAayqE.css?delta=1&language=es&theme=minerva_subtheme&include=eJx1jtEKwjAMRX-oWx_8oJJ0Yau2SWnS6f7eoahQ8OUSziGXi5EDQmvg8XMFehg1huxKYmo7BO1oGxXysatJmdSOnHj9-rdEEVNrUAcepfNZONA1C0L-U5WiTHA936AQ2yA1p3gbmfQWKSiwhsvg7nBUSWzqKjRYz4Gb-qX1Cnn-kblz7ZiTbrQ4PdSoeAQltye6q3_lXGTpmZ6zeXnU — 200 — 1008 B — 13 ms — h2https://ajuntament.barcelona.cat/mercats/sites/default/files/css/css_38p8keGe7zl6FVw261Q2YqJZBo4EnEsDuamA2B5Ebpw.css?delta=2&language=es&theme=minerva_subtheme&include=eJx1jtEKwjAMRX-oWx_8oJJ0Yau2SWnS6f7eoahQ8OUSziGXi5EDQmvg8XMFehg1huxKYmo7BO1oGxXysatJmdSOnHj9-rdEEVNrUAcepfNZONA1C0L-U5WiTHA936AQ2yA1p3gbmfQWKSiwhsvg7nBUSWzqKjRYz4Gb-qX1Cnn-kblz7ZiTbrQ4PdSoeAQltye6q3_lXGTpmZ6zeXnU/mercats/sites/default/files/css/cs... https://ajuntament.barcelona.cat/mercats/sites/default/files/css/css_38p8keGe7zl6FVw261Q2YqJZBo4EnEsDuamA2B5Ebpw.css?delta=2&language=es&theme=minerva_subtheme&include=eJx1jtEKwjAMRX-oWx_8oJJ0Yau2SWnS6f7eoahQ8OUSziGXi5EDQmvg8XMFehg1huxKYmo7BO1oGxXysatJmdSOnHj9-rdEEVNrUAcepfNZONA1C0L-U5WiTHA936AQ2yA1p3gbmfQWKSiwhsvg7nBUSWzqKjRYz4Gb-qX1Cnn-kblz7ZiTbrQ4PdSoeAQltye6q3_lXGTpmZ6zeXnU — 200 — 67.5 KiB — 17 ms — h2https://www.barcelona.cat/assetsdi/icoajuntament/bcn-icon.csswww.barcelona.cat/assetsdi/icoajunt... https://www.barcelona.cat/assetsdi/icoajuntament/bcn-icon.css — 200 — 3.4 KiB — 30 ms — h2https://www.barcelona.cat/assetsdi/icoajuntament-v2/bcn-icon.csswww.barcelona.cat/assetsdi/icoajunt... https://www.barcelona.cat/assetsdi/icoajuntament-v2/bcn-icon.css — 200 — 4.6 KiB — 30 ms — h2https://fonts.googleapis.com/css2?family=Source+Sans+3:ital,wght@0,200..900;1,200..900fonts.googleapis.com/css2?family=So... https://fonts.googleapis.com/css2?family=Source+Sans+3:ital,wght@0,200..900;1,200..900 — 200 — 1.2 KiB — 150 ms — h2https://ajuntament.barcelona.cat/mercats/sites/default/files/css/css_VwX75qT77AwiV2q1yppjMWsv98Bs2j3jCUVonIScEfA.css?delta=6&language=es&theme=minerva_subtheme&include=eJx1jtEKwjAMRX-oWx_8oJJ0Yau2SWnS6f7eoahQ8OUSziGXi5EDQmvg8XMFehg1huxKYmo7BO1oGxXysatJmdSOnHj9-rdEEVNrUAcepfNZONA1C0L-U5WiTHA936AQ2yA1p3gbmfQWKSiwhsvg7nBUSWzqKjRYz4Gb-qX1Cnn-kblz7ZiTbrQ4PdSoeAQltye6q3_lXGTpmZ6zeXnU/mercats/sites/default/files/css/cs... https://ajuntament.barcelona.cat/mercats/sites/default/files/css/css_VwX75qT77AwiV2q1yppjMWsv98Bs2j3jCUVonIScEfA.css?delta=6&language=es&theme=minerva_subtheme&include=eJx1jtEKwjAMRX-oWx_8oJJ0Yau2SWnS6f7eoahQ8OUSziGXi5EDQmvg8XMFehg1huxKYmo7BO1oGxXysatJmdSOnHj9-rdEEVNrUAcepfNZONA1C0L-U5WiTHA936AQ2yA1p3gbmfQWKSiwhsvg7nBUSWzqKjRYz4Gb-qX1Cnn-kblz7ZiTbrQ4PdSoeAQltye6q3_lXGTpmZ6zeXnU — 200 — 4.4 KiB — 13 ms — 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— 7 ms — h2https://plausible.io/api/eventplausible.io/api/event https://plausible.io/api/event — 202 — 502 B — 47 ms — h2https://analiticaweb.bcn.cat/es-internet.txtanaliticaweb.bcn.cat/es-internet.tx... https://analiticaweb.bcn.cat/es-internet.txt — 200 — 470 B — 18 ms — h2https://api.lawwwing.com/api/widget/load/api.lawwwing.com/api/widget/load/ https://api.lawwwing.com/api/widget/load/ — 204 — 0 B — 111 ms — h2https://cdn.lawwwing.com/media/widgets/brands/2ef97148-3d5b-4609-a816-113e25c232d8/simbol-barcelona_132x132_JOtoJaO.pngcdn.lawwwing.com/media/widgets/bran... https://cdn.lawwwing.com/media/widgets/brands/2ef97148-3d5b-4609-a816-113e25c232d8/simbol-barcelona_132x132_JOtoJaO.png — 200 — 3.2 KiB — 10 ms — h2https://www.barcelona.cat/favicon.icowww.barcelona.cat/favicon.ico https://www.barcelona.cat/favicon.ico — 200 — 1.2 KiB — 5 ms — h2https://www.barcelona.cat/avisos/data.jsonwww.barcelona.cat/avisos/data.json https://www.barcelona.cat/avisos/data.json — 200 — 573 B — 4 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 (2026-10-14 — 2026-11-10)

LCP (p75)

1903 ms

85% good

INP (p75)

106 ms

92% good

CLS (p75)

0.050

89% good

FCP (p75)

1469 ms

TTFB (p75)

848 ms

This origin passes Core Web Vitals assessment
Image Optimization
17 images, 47 KB total, 39 KB wasted
INFO

Image Optimization Audit

Total Images

17

Total Size

47 KB

Oversized

1

Wasted

39 KB

16 missing dimensions 11 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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