Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.96 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
0 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.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.96 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.
0 ms
Page Load Progression
DPage Weight BudgetAction2.3 MB transferred, 52 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
FJS Execution CostAction3947ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.publico.es/ | 1600ms | 156ms | 14ms | 1st |
| Unattributable | 691ms | 183ms | 0ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/ui-web-es-web.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 245ms | 166ms | 19ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 223ms | 192ms | 31ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-QFCGYDTZLZ&cx=c>m=4e64k1 | 219ms | 181ms | 34ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PTC4Z5 | 213ms | 166ms | 37ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-1B3Q8QTNDB&cx=c>m=4e64k1 | 197ms | 162ms | 34ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-MJZ6HSFQQG&cx=c>m=4e64k1 | 190ms | 150ms | 37ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946 | 151ms | 108ms | 40ms | 3rd |
| https://static.chartbeat.com/js/chartbeat.js | 76ms | 72ms | 4ms | 3rd |
Showing top 10 of 12 scripts
DPage Weight InventoryAction52 resources · 2.3 MB · 0 KB savings availableFIX
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 52 resources | 2.3 MiB | ||||||
BThird-Party Impact48% third-party, 0 ms blockingREVIEW
CImage OptimizationAction16 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading9 fonts (352 KB)PASS
Web fonts
9
352 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
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+JS Bundles16 scripts, 0 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://sdk.privacy-center.org/d892ed41-2bfc-4977-a05e-07be26865229/loader.js?target=www.publico.es | 35 KB | — | ✓ | 3rd |
| https://www.publico.es/assets/board.bundle.js?v=1776147505 | 20 KB | — | ✓ | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-PTC4Z5 | 132 KB | — | ✓ | 3rd |
| https://www.googletagservices.com/tag/js/gpt.js | 35 KB | — | ✓ | 3rd |
| https://s3.eu-central-1.amazonaws.com/sc-devel/sc-tagmanager/publico.js | 4 KB | — | ✓ | 3rd |
| https://s3.eu-central-1.amazonaws.com/sc-devel/Skins/SMCService.js | 24 KB | — | ✓ | 3rd |
| https://cdn.smartclip-services.com/v1/Storage-a482323/smartclip-services/HeaderBidding/js/SmartclipConfig.js | 6 KB | — | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 102 KB | — | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-MJZ6HSFQQG&cx=c>m=4e64k1 | 157 KB | — | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-1B3Q8QTNDB&cx=c>m=4e64k1 | 152 KB | — | ✓ | 3rd |
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints5 hints, 0 missing preconnectsPASS
Current Resource Hints
5 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=60 (1 minute)PASS
max-age=60, must-revalidate, stale-if-error=86400, stale-while-revalidate=6
| Directive | Value | Meaning |
|---|---|---|
| max-age | 60 | Cache for 1 minute |
| must-revalidate | — | Must recheck with server after expiry |
| stale-if-error | 86400 | |
| stale-while-revalidate | 6 | Serve stale for 6 seconds while fetching fresh |
Network Waterfall52 requests over 909msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 691ms | 0 KB | — | €8/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 245ms | 55 KB | — | €3/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 223ms | 102 KB | — | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 219ms | 151 KB | — | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 213ms | 132 KB | — | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 197ms | 152 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 190ms | 157 KB | — | €2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 151ms | 187 KB | — | €2/mo | Optional |
static.chartbeat.com static.chartbeat.com | Other | 76ms | 16 KB | — | €1/mo | Optional |
www.googletagservices.com www.googletagservices.com | Other | 71ms | 35 KB | — | €1/mo | Optional |
dphp.spxl.socy.es dphp.spxl.socy.es | Other | 70ms | 9 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 691ms and costs ~€8/month
- sdk.privacy-center.org adds 245ms and costs ~€3/month
- sdk.privacy-center.org adds 223ms and costs ~€2/month
- Google Tag Manager adds 219ms and costs ~€2/month
- Google Tag Manager adds 213ms and costs ~€2/month
59% of JavaScript execution time comes from third-party scripts.
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
Unattributable takes 691ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
sdk.privacy-center.org takes 245ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
sdk.privacy-center.org takes 223ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 219ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 213ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev