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.
8.57 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
15.51 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
450 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.695
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.57 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.
19.68 s
Page Load Progression
FPage Weight BudgetAction3.2 MB transferred, 102 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 ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction3385ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 570ms | 480ms | 71ms | 3rd |
| https://www.theatlantic.com/world/ | 558ms | 70ms | 3ms | 3rd |
| Unattributable | 522ms | 22ms | 0ms | 3rd |
| https://cdn.theatlantic.com/_next/static/chunks/framework-b9fd9bcc3ecde907.js | 448ms | 414ms | 11ms | 3rd |
| https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js | 312ms | 232ms | 10ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 168ms | 112ms | 42ms | 3rd |
| https://01.cdn.mediatradecraft.com/cmdjs/runtime-2.9.3.js | 138ms | 120ms | 13ms | 3rd |
| https://cdn.theatlantic.com/_next/static/chunks/pages/_app-2a68766c1c631a4a.js | 118ms | 89ms | 21ms | 3rd |
| https://cdn.privacy-mgmt.com/unified/4.40.1/usnat.f12613136193900e32e2.bundle.js | 108ms | 79ms | 29ms | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 96ms | 54ms | 25ms | 3rd |
Showing top 10 of 15 scripts
FJS BundlesAction40 scripts, 811 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 186 KB | 141 KB (76%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 58 KB (64%) | ✓ | 3rd |
| https://cdn.theatlantic.com/_next/static/chunks/pages/_app-2a68766c1c631a4a.js | 89 KB | 36 KB (41%) | ✓ | 3rd |
| https://01.cdn.mediatradecraft.com/cmdjs/runtime-2.9.3.js | 36 KB | 22 KB (63%) | ✓ | 3rd |
| https://cdn.privacy-mgmt.com/unified/4.40.1/usnat.f12613136193900e32e2.bundle.js | 42 KB | 21 KB (51%) | ✓ | 3rd |
| https://cdn.theatlantic.com/_next/static/uceoeOiB2I2qNKUhiJZtZ/_ssgManifest.js | 0 KB | — | ✓ | 3rd |
| https://cdn.theatlantic.com/_next/static/chunks/6178-c21e3d7e9c14dc32.js | 7 KB | — | ✓ | 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 InventoryAction102 resources · 3.2 MB · 811 KB savings availableFIX
~810.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 102 resources | 3.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
AImage Optimization23 images, 0 KB saveablePASS
A+Font Loading11 fonts (365 KB)PASS
Web fonts
11
365 KB total
Render-blocking
0
of 11
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 Hints28 hints, 0 missing preconnectsPASS
Current Resource Hints
28 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall102 requests over 2321msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 570ms | 0 KB | 49% | €9/mo | Costly |
www.theatlantic.com www.theatlantic.com | Other | 558ms | 77 KB | — | €9/mo | Costly |
Unattributable Unattributable | Other | 522ms | 0 KB | — | €8/mo | Costly |
cdn.theatlantic.com cdn.theatlantic.com | Other | 448ms | 44 KB | — | €7/mo | Costly |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 312ms | 42 KB | — | €5/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 168ms | 186 KB | 76% | €3/mo | Optional |
01.cdn.mediatradecraft.com 01.cdn.mediatradecraft.com | Other | 138ms | 36 KB | 63% | €2/mo | Optional |
cdn.theatlantic.com cdn.theatlantic.com | Other | 118ms | 89 KB | 41% | €2/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 108ms | 42 KB | 51% | €2/mo | Optional |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 96ms | 91 KB | 64% | €2/mo | Optional |
cdn.theatlantic.com cdn.theatlantic.com | Other | 81ms | 1 KB | — | €1/mo | Optional |
cdn.theatlantic.com cdn.theatlantic.com | Other | 79ms | 39 KB | — | €1/mo | Optional |
01.cdn.mediatradecraft.com 01.cdn.mediatradecraft.com | Other | 69ms | 27 KB | — | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 62ms | 34 KB | — | €1/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 54ms | 31 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.gstatic.com adds 570ms and costs ~€9/month
- www.theatlantic.com adds 558ms and costs ~€9/month
- Unattributable adds 522ms and costs ~€8/month
- cdn.theatlantic.com adds 448ms and costs ~€7/month
- cdn.privacy-mgmt.com adds 312ms and costs ~€5/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.gstatic.com takes 570ms 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.theatlantic.com takes 558ms 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 522ms 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.theatlantic.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
cdn.privacy-mgmt.com takes 312ms 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
76% 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
63% of 01.cdn.mediatradecraft.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
51% of cdn.privacy-mgmt.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
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