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.
3.12 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.69 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.77 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.
7.75 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.
32.40 s
Page Load Progression
FPage Weight BudgetAction4.0 MB transferred, 215 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
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 ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction11608ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.newsweek.com/ | 1744ms | 54ms | 147ms | 3rd |
| Unattributable | 1484ms | 209ms | 0ms | 3rd |
| https://www.newsweek.com/_next/static/chunks/1255-01735991e86fac1b.js | 1190ms | 997ms | 16ms | 3rd |
| https://www.newsweek.com/_next/static/chunks/2389-dd40bda9a2e98bd9.js | 1015ms | 713ms | 6ms | 3rd |
| https://cadmus.script.ac/d275im4r3zngba/script.js | 917ms | 859ms | 19ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604090102/pubads_impl.js?cb=31097906 | 891ms | 828ms | 40ms | 3rd |
| https://www.newsweek.com/_next/static/chunks/8133-d66177fd28c10cd8.js | 470ms | 395ms | 49ms | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 457ms | 329ms | 111ms | 3rd |
| https://cdn.newsweek.com/api/tinypass.min.js | 448ms | 361ms | 40ms | 3rd |
| https://www.newsweek.com/_next/static/chunks/4bd1b696-182b6b13bdad92e3.js | 377ms | 296ms | 14ms | 3rd |
Showing top 10 of 29 scripts
FJS BundlesAction82 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.newsweek.com/_next/static/chunks/a4634e51-029fd7e9639682bb.js | 139 KB | 133 KB (96%) | ✓ | 3rd |
| https://www.newsweek.com/prebid.js | 172 KB | 132 KB (77%) | ✓ | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 257 KB | 108 KB (42%) | ✓ | 3rd |
| https://imasdk.googleapis.com/js/sdkloader/ima3.js | 147 KB | 107 KB (73%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604090102/pubads_impl.js?cb=31097906 | 188 KB | 104 KB (55%) | ✓ | 3rd |
| https://www.newsweek.com/_next/static/chunks/8133-d66177fd28c10cd8.js | 121 KB | 93 KB (77%) | ✓ | 3rd |
| https://cdn.newsweek.com/api/tinypass.min.js | 133 KB | 82 KB (62%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 68 KB (71%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TVS8NW5 | 143 KB | 61 KB (43%) | ✓ | 3rd |
| https://client.aps.amazon-adsystem.com/publisher.js | 91 KB | 51 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 InventoryAction215 resources · 4.0 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 215 resources | 4.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization35 images, 0 KB saveableREVIEW
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 Loading4 fonts (111 KB)PASS
Web fonts
4
111 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~1 KB and ~2 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints33 hints, 0 missing preconnectsPASS
Current Resource Hints
33 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall215 requests over 5806msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.newsweek.com www.newsweek.com | Other | 1744ms | 128 KB | — | €19/mo | Costly |
Unattributable Unattributable | Other | 1484ms | 0 KB | — | €16/mo | Costly |
www.newsweek.com www.newsweek.com | Other | 1190ms | 41 KB | — | €13/mo | Costly |
www.newsweek.com www.newsweek.com | Other | 1015ms | 15 KB | — | €11/mo | Costly |
cadmus.script.ac cadmus.script.ac | Other | 917ms | 72 KB | — | €10/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 891ms | 188 KB | 55% | €10/mo | Costly |
www.newsweek.com www.newsweek.com | Other | 470ms | 121 KB | 77% | €5/mo | Costly |
cdn.ketchjs.com cdn.ketchjs.com | Other | 457ms | 257 KB | 42% | €5/mo | Costly |
cdn.newsweek.com cdn.newsweek.com | Other | 448ms | 133 KB | 62% | €5/mo | Costly |
www.newsweek.com www.newsweek.com | Other | 377ms | 50 KB | — | €4/mo | Costly |
www.newsweek.com www.newsweek.com | Other | 256ms | 44 KB | 79% | €3/mo | Costly |
client.aps.amazon-adsystem.com client.aps.amazon-adsystem.com | Other | 233ms | 91 KB | 56% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 214ms | 143 KB | 43% | €2/mo | Costly |
cdn.viafoura.net cdn.viafoura.net | Other | 182ms | 16 KB | — | €2/mo | Optional |
cdn.cxense.com cdn.cxense.com | Other | 173ms | 38 KB | 58% | €2/mo | Optional |
silo43.p7cloud.net silo43.p7cloud.net | Other | 169ms | 27 KB | — | €2/mo | Optional |
openads-cdn.adsrvr.org openads-cdn.adsrvr.org | Other | 167ms | 94 KB | 53% | €2/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 152ms | 34 KB | — | €2/mo | Optional |
www.newsweek.com www.newsweek.com | Other | 138ms | 3 KB | — | €2/mo | Optional |
www.newsweek.com www.newsweek.com | Other | 136ms | 172 KB | 77% | €1/mo | Optional |
imasdk.googleapis.com imasdk.googleapis.com | Other | 114ms | 147 KB | 73% | €1/mo | Optional |
b-code.liadm.com b-code.liadm.com | Other | 114ms | 46 KB | — | €1/mo | Optional |
ats-wrapper.privacymanager.io ats-wrapper.privacymanager.io | Other | 101ms | 75 KB | 54% | €1/mo | Optional |
config.aps.amazon-adsystem.com config.aps.amazon-adsystem.com | Other | 92ms | 2 KB | — | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 80ms | 34 KB | — | €1/mo | Optional |
secure.cdn.fastclick.net secure.cdn.fastclick.net | Other | 80ms | 47 KB | 43% | €1/mo | Optional |
www.newsweek.com www.newsweek.com | Other | 78ms | 205 KB | 12% | €1/mo | Optional |
secure.cdn.fastclick.net secure.cdn.fastclick.net | Other | 78ms | 25 KB | — | €1/mo | Optional |
secure.cdn.fastclick.net secure.cdn.fastclick.net | Other | 60ms | 22 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.newsweek.com adds 1744ms and costs ~€19/month
- Unattributable adds 1484ms and costs ~€16/month
- www.newsweek.com adds 1190ms and costs ~€13/month
- www.newsweek.com adds 1015ms and costs ~€11/month
- cadmus.script.ac adds 917ms and costs ~€10/month
- securepubads.g.doubleclick.net adds 891ms and costs ~€10/month
- www.newsweek.com adds 470ms and costs ~€5/month
- cdn.ketchjs.com adds 457ms and costs ~€5/month
- cdn.newsweek.com adds 448ms and costs ~€5/month
- www.newsweek.com adds 377ms and costs ~€4/month
- www.newsweek.com adds 256ms and costs ~€3/month
- client.aps.amazon-adsystem.com adds 233ms and costs ~€3/month
- Google Tag Manager adds 214ms 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.newsweek.com takes 1744ms 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 1484ms 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
www.newsweek.com takes 1190ms 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
www.newsweek.com takes 1015ms 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
cadmus.script.ac takes 917ms 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
securepubads.g.doubleclick.net takes 891ms 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 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
www.newsweek.com takes 470ms 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
77% of www.newsweek.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
cdn.ketchjs.com takes 457ms 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
cdn.newsweek.com takes 448ms 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 cdn.newsweek.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
www.newsweek.com takes 377ms 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
www.newsweek.com takes 256ms 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
79% of www.newsweek.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
client.aps.amazon-adsystem.com takes 233ms 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 client.aps.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
Google Tag Manager takes 214ms 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
58% of cdn.cxense.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
53% of openads-cdn.adsrvr.org'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
77% of www.newsweek.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
73% of imasdk.googleapis.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
54% of ats-wrapper.privacymanager.io'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