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.
2.68 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.23 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.87 s
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.
5.23 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.
16.76 s
Page Load Progression
DPage Weight BudgetAction2.2 MB transferred, 79 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6614ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.20minutos.es/ | 1748ms | 108ms | 11ms | 3rd |
| Unattributable | 1154ms | 357ms | 0ms | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 400ms | 317ms | 79ms | 3rd |
| https://dkumiip2e9ary.cloudfront.net/js/prometeo-media/pro/prometeov2.js | 394ms | 311ms | 60ms | 3rd |
| https://dkumiip2e9ary.cloudfront.net/js/prometeo-media/pro/segment.js | 360ms | 242ms | 93ms | 3rd |
| https://cdns.eu1.gigya.com/js/gigya.js?apikey=3_Hob3SXLWsBRwjPFz4f4ZEuxPo2PyeElFMWgWO2EXdBYUqwMk8lxNj78Fi_2VW5cH&lang=es | 333ms | 242ms | 74ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946 | 331ms | 220ms | 89ms | 3rd |
| https://sdk.mrf.io/statics/marfeel-sdk.js?id=2278 | 303ms | 249ms | 2ms | 3rd |
| https://hb.20m.es/prebid/9.43.0-20m-v4.js | 249ms | 187ms | 61ms | 3rd |
| https://bd0d60c1-6781-4938-a4fb-cfcf9f6d255d.edge.permutive.app/327b424d-bd9f-4f77-ba6a-d0996e8679a9-web.js | 218ms | 140ms | 64ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction30 scripts, 887 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdns.eu1.gigya.com/js/gigya.js?apikey=3_Hob3SXLWsBRwjPFz4f4ZEuxPo2PyeElFMWgWO2EXdBYUqwMk8lxNj78Fi_2VW5cH&lang=es | 238 KB | 142 KB (60%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946 | 187 KB | 141 KB (75%) | ✓ | 3rd |
| https://dkumiip2e9ary.cloudfront.net/js/prometeo-media/pro/segment.js | 184 KB | 101 KB (55%) | ✓ | 3rd |
| https://hb.20m.es/prebid/9.43.0-20m-v4.js | 120 KB | 96 KB (80%) | ✓ | 3rd |
| https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.PJsh2cctCQI.O/m=client/rt=j/sv=1/d=1/ed=1/rs=AHpOoo_QlMhY2cycn60Rs8eI1WInRwuahw/cb=gapi.loaded_0?le=scs | 108 KB | 80 KB (75%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 58 KB (64%) | ✓ | 3rd |
| https://dkumiip2e9ary.cloudfront.net/js/prometeo-media/pro/trigger.js | 76 KB | 49 KB (65%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js | 103 KB | 48 KB (47%) | ✓ | 3rd |
| https://dkumiip2e9ary.cloudfront.net/js/prometeo-media/pro/prometeov2.js | 101 KB | 45 KB (44%) | ✓ | 3rd |
| https://dkumiip2e9ary.cloudfront.net/js/prometeo-media/pro/identification.js | 78 KB | 43 KB (56%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction79 resources · 2.2 MB · 887 KB savings availableFIX
~887.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 79 resources | 2.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction30 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
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
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
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.
Performance issues directly impact user engagement and conversion rates.
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 Loading2 fonts (85 KB)PASS
Web fonts
2
85 KB total
Render-blocking
0
of 2
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+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints15 hints, 0 missing preconnectsPASS
Current Resource Hints
15 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall79 requests over 2019msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.20minutos.es www.20minutos.es | Other | 1748ms | 92 KB | — | €19/mo | Costly |
Unattributable Unattributable | Other | 1154ms | 0 KB | — | €13/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 400ms | 103 KB | 47% | €4/mo | Costly |
dkumiip2e9ary.cloudfront.net dkumiip2e9ary.cloudfront.net | Other | 394ms | 101 KB | 44% | €4/mo | Costly |
dkumiip2e9ary.cloudfront.net dkumiip2e9ary.cloudfront.net | Other | 360ms | 184 KB | 55% | €4/mo | Costly |
cdns.eu1.gigya.com cdns.eu1.gigya.com | Other | 333ms | 238 KB | 60% | €4/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 331ms | 187 KB | 75% | €4/mo | Costly |
sdk.mrf.io sdk.mrf.io | Other | 303ms | 63 KB | 41% | €3/mo | Costly |
hb.20m.es hb.20m.es | Other | 249ms | 120 KB | 80% | €3/mo | Costly |
bd0d60c1-6781-4938-a4fb-cfcf9f6d255d.edge.permutive.app bd0d60c1-6781-4938-a4fb-cfcf9f6d255d.edge.permutive.app | Other | 218ms | 118 KB | 31% | €2/mo | Costly |
dkumiip2e9ary.cloudfront.net dkumiip2e9ary.cloudfront.net | Other | 138ms | 76 KB | 65% | €2/mo | Optional |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 138ms | 91 KB | 64% | €1/mo | Optional |
dkumiip2e9ary.cloudfront.net dkumiip2e9ary.cloudfront.net | Other | 137ms | 78 KB | 56% | €1/mo | Optional |
experiences.mrf.io experiences.mrf.io | Other | 126ms | 28 KB | — | €1/mo | Optional |
apis.google.com apis.google.com | Other | 125ms | 108 KB | 75% | €1/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 120ms | 55 KB | 42% | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 114ms | 35 KB | — | €1/mo | Optional |
es-config.sensic.net es-config.sensic.net | Other | 106ms | 31 KB | — | €1/mo | Optional |
dkumiip2e9ary.cloudfront.net dkumiip2e9ary.cloudfront.net | Other | 68ms | 35 KB | — | €1/mo | Optional |
hb.20m.es hb.20m.es | Other | 50ms | 30 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.20minutos.es adds 1748ms and costs ~€19/month
- Unattributable adds 1154ms and costs ~€13/month
- sdk.privacy-center.org adds 400ms and costs ~€4/month
- dkumiip2e9ary.cloudfront.net adds 394ms and costs ~€4/month
- dkumiip2e9ary.cloudfront.net adds 360ms and costs ~€4/month
- cdns.eu1.gigya.com adds 333ms and costs ~€4/month
- securepubads.g.doubleclick.net adds 331ms and costs ~€4/month
- sdk.mrf.io adds 303ms and costs ~€3/month
- hb.20m.es adds 249ms and costs ~€3/month
- bd0d60c1-6781-4938-a4fb-cfcf9f6d255d.edge.permutive.app adds 218ms and costs ~€2/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.20minutos.es takes 1748ms 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
Unattributable takes 1154ms 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 400ms 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
dkumiip2e9ary.cloudfront.net takes 394ms 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
dkumiip2e9ary.cloudfront.net takes 360ms 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
55% of dkumiip2e9ary.cloudfront.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
cdns.eu1.gigya.com takes 333ms 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
60% of cdns.eu1.gigya.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
securepubads.g.doubleclick.net takes 331ms 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
75% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
sdk.mrf.io takes 303ms 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
hb.20m.es takes 249ms 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
80% of hb.20m.es's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
bd0d60c1-6781-4938-a4fb-cfcf9f6d255d.edge.permutive.app takes 218ms 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
65% of dkumiip2e9ary.cloudfront.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
64% of c.amazon-adsystem.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
56% of dkumiip2e9ary.cloudfront.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
75% of apis.google.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev