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.
7.32 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.92 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.96 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.
11.25 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.
20.71 s
Page Load Progression
FPage Weight BudgetAction4.2 MB transferred, 135 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction97% third-party, 0 ms blockingFIX
FJS Execution CostAction12717ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://elpais.com/ | 4898ms | 101ms | 17ms | 1st |
| Unattributable | 1680ms | 367ms | 0ms | 3rd |
| https://sdk.mrf.io/statics/marfeel-sdk.js?id=2223 | 1113ms | 1058ms | 2ms | 3rd |
| https://assets.adobedtm.com/0681c221600c/d0943e7fed9e/launch-90f4fb204f3b.min.js | 815ms | 673ms | 107ms | 3rd |
| https://fundingchoicesmessages.google.com/f/AGSKWxU772CjjWVxfmq7kTyZ317uJQoocVzqOOp4PH52sDsmZy_4ayHOkhugbYWqJ7-O9IRjvVgOWSLRD6iHIeLyRfMgo2B9QRMIeDeNI6dqWVrilyq0V9n8PDIOMwWxQQbMeHd7-4c=?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2MjkzNjcyLDcwMjAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly9lbHBhaXMuY29tLyIsbnVsbCxbWzgsIldRU2pLdGtFWWlNIl0sWzksImVuLVVTIl0sWzE2LCJbMSwxLDFdIl0sWzM1LCIxNzc2MjkzNjcyIl0sWzE5LCIyIl0sWzE3LCJbMF0iXSxbMjQsIiJdLFsyOSwiZmFsc2UiXV1d | 496ms | 41ms | 2ms | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 463ms | 390ms | 51ms | 3rd |
| https://dd.elpais.com/tags.js | 450ms | 362ms | 14ms | 3rd |
| https://static.elpais.com/dist/resources/js/bb68fdafcde215f438478153f2f47c32/ENP-section-front.js | 384ms | 214ms | 144ms | 3rd |
| https://ak-ads-ns.prisasd.com/slot/elpais/slot.js | 293ms | 95ms | 21ms | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/ui-web-en-web.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 274ms | 172ms | 33ms | 3rd |
Showing top 10 of 25 scripts
FJS BundlesAction40 scripts, 557 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://static.elpais.com/dist/resources/js/bb68fdafcde215f438478153f2f47c32/ENP-section-front.js | 192 KB | 131 KB (68%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 79 KB (83%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 51 KB (56%) | ✓ | 3rd |
| https://assets.adobedtm.com/0681c221600c/d0943e7fed9e/launch-90f4fb204f3b.min.js | 140 KB | 49 KB (35%) | ✓ | 3rd |
| https://player.prisamedia.com/core//js/coreplayer.min.js | 69 KB | 49 KB (71%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/sdk.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 101 KB | 44 KB (43%) | ✓ | 3rd |
| https://fundingchoicesmessages.google.com/f/AGSKWxWl4OHVOhONFmrW5xi_scJ2jYwch61PP591wCtLQJVTlKBzlHvrAnxtgHVpItmxcNRmUnc2DlVHjXZ1d7PY | 70 KB | 36 KB (53%) | ✓ | 3rd |
| https://ak-ads-ns.prisasd.com/slot/elpais/slot.js | 53 KB | 33 KB (62%) | ✓ | 3rd |
| https://sdk.privacy-center.org/sdk/d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3/modern/ui-web-en-web.d4911c3d5b4b9a80b40e05167f53d1b1e8da81f3.js | 53 KB | 22 KB (43%) | ✓ | 3rd |
| https://sdk.mrf.io/statics/4f3040276b65d670f769.js | 23 KB | 22 KB (95%) | ✓ | 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 InventoryAction135 resources · 4.2 MB · 557 KB savings availableFIX
~557.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 135 resources | 4.2 MiB | ||||||
BImage Optimization30 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
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 Loading13 fonts (347 KB)PASS
Web fonts
13
347 KB total
Render-blocking
0
of 13
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 Hints7 hints, 0 missing preconnectsPASS
Current Resource Hints
7 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+HTTP Cachingmax-age=60 (1 minute)PASS
private, max-age=60
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| max-age | 60 | Cache for 1 minute |
Network Waterfall135 requests over 7978msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1680ms | 0 KB | — | €9/mo | Costly |
sdk.mrf.io sdk.mrf.io | Other | 1113ms | 60 KB | 34% | €6/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 815ms | 140 KB | 35% | €4/mo | Costly |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 496ms | 4 KB | — | €3/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 463ms | 101 KB | 43% | €2/mo | Costly |
dd.elpais.com dd.elpais.com | Other | 450ms | 39 KB | — | €2/mo | Costly |
static.elpais.com static.elpais.com | Other | 384ms | 192 KB | 68% | €2/mo | Costly |
ak-ads-ns.prisasd.com ak-ads-ns.prisasd.com | Other | 293ms | 53 KB | 62% | €2/mo | Costly |
sdk.privacy-center.org sdk.privacy-center.org | Other | 274ms | 53 KB | 43% | €1/mo | Costly |
player.prisamedia.com player.prisamedia.com | Other | 267ms | 69 KB | 71% | €1/mo | Costly |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 266ms | 70 KB | 53% | €1/mo | Costly |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 250ms | 91 KB | 56% | €1/mo | Costly |
cmp.prisa.com cmp.prisa.com | Other | 185ms | 8 KB | — | €1/mo | Optional |
static.prisa.com static.prisa.com | Other | 122ms | 36 KB | — | €1/mo | Optional |
es-config.sensic.net es-config.sensic.net | Other | 112ms | 31 KB | — | €1/mo | Optional |
static.prisa.com static.prisa.com | Other | 102ms | 38 KB | 55% | €1/mo | Optional |
static.prisa.com static.prisa.com | Other | 88ms | 26 KB | — | €0/mo | Optional |
sdk.privacy-center.org sdk.privacy-center.org | Other | 87ms | 1 KB | — | €0/mo | Optional |
static.prisa.com static.prisa.com | Other | 77ms | 6 KB | — | €0/mo | Optional |
accounts.google.com accounts.google.com | Other | 68ms | 96 KB | 83% | €0/mo | Optional |
player.prisamedia.com player.prisamedia.com | Other | 61ms | 12 KB | — | €0/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 60ms | 36 KB | — | €0/mo | Optional |
config.aps.amazon-adsystem.com config.aps.amazon-adsystem.com | Other | 54ms | 1 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1680ms and costs ~€9/month
- sdk.mrf.io adds 1113ms and costs ~€6/month
- assets.adobedtm.com adds 815ms and costs ~€4/month
- fundingchoicesmessages.google.com adds 496ms and costs ~€3/month
- sdk.privacy-center.org adds 463ms and costs ~€2/month
- dd.elpais.com adds 450ms and costs ~€2/month
- static.elpais.com adds 384ms and costs ~€2/month
- ak-ads-ns.prisasd.com adds 293ms and costs ~€2/month
- sdk.privacy-center.org adds 274ms and costs ~€1/month
- player.prisamedia.com adds 267ms and costs ~€1/month
- fundingchoicesmessages.google.com adds 266ms and costs ~€1/month
- c.amazon-adsystem.com adds 250ms and costs ~€1/month
61% 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 1680ms 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.mrf.io takes 1113ms 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
assets.adobedtm.com takes 815ms 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
fundingchoicesmessages.google.com takes 496ms 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 463ms 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
dd.elpais.com takes 450ms 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
static.elpais.com takes 384ms 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
68% of static.elpais.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
ak-ads-ns.prisasd.com takes 293ms 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
62% of ak-ads-ns.prisasd.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
sdk.privacy-center.org takes 274ms 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
player.prisamedia.com takes 267ms 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
71% of player.prisamedia.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
fundingchoicesmessages.google.com takes 266ms 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
53% of fundingchoicesmessages.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
c.amazon-adsystem.com takes 250ms 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
56% 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
55% of static.prisa.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
83% of accounts.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