Performance
· 15 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.
1.02 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.66 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
432 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.007
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.84 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.
6.76 s
Page Load Progression
FPage Weight BudgetAction4.9 MB transferred, 151 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
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
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 CostAction2539ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.sbnation.com/_next/static/chunks/pages/_app-f12a555ef0f2ad9c.js | 441ms | 310ms | 77ms | 3rd |
| https://www.sbnation.com/_next/static/chunks/framework-ae5702bffa1bfba7.js | 368ms | 333ms | 4ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 332ms | 282ms | 12ms | 3rd |
| https://www.sbnation.com/ | 315ms | 5ms | 0ms | 3rd |
| Unattributable | 259ms | 21ms | 0ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otTCF.js | 213ms | 187ms | 2ms | 3rd |
| https://cdn.concert.io/lib/concert-ads/v2-latest/concert_ads.js | 165ms | 37ms | 11ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 116ms | 71ms | 12ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WQ5FM5W | 113ms | 97ms | 15ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-2M5GYNY1YS&cx=c>m=4e64h1h1 | 80ms | 69ms | 10ms | 3rd |
Showing top 10 of 12 scripts
FJS BundlesAction46 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.sbnation.com/_next/static/chunks/pages/_app-f12a555ef0f2ad9c.js | 648 KB | 287 KB (44%) | ✓ | 3rd |
| 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/m202604160201/pubads_impl.js | 188 KB | 129 KB (69%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-926030959&cx=c>m=4e64h1h1 | 138 KB | 66 KB (48%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 129 KB | 60 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-2M5GYNY1YS&cx=c>m=4e64h1h1 | 153 KB | 60 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WQ5FM5W | 185 KB | 52 KB (28%) | ✓ | 3rd |
| https://cdn.concert.io/lib/concert-ads/v2-latest/concert_ads.js | 104 KB | 41 KB (50%) | ✓ | 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 InventoryAction151 resources · 4.9 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 151 resources | 4.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization31 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
A+Text CompressionAll text resources are compressedPASS
A+Font Loading9 fonts (737 KB)PASS
Web fonts
9
737 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~239 KB and ~478 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Axis12 Ltd
Network Waterfall151 requests over 4944msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.sbnation.com www.sbnation.com | Other | 441ms | 648 KB | 44% | $3/mo | Costly |
www.sbnation.com www.sbnation.com | Other | 368ms | 42 KB | — | $2/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 332ms | 188 KB | 69% | $2/mo | Costly |
www.sbnation.com www.sbnation.com | Other | 315ms | 52 KB | — | $2/mo | Costly |
Unattributable Unattributable | Other | 259ms | 0 KB | — | $1/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 213ms | 18 KB | — | $1/mo | Essential |
cdn.concert.io cdn.concert.io | Other | 165ms | 104 KB | 50% | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 116ms | 129 KB | 47% | $1/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 113ms | 185 KB | 28% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 80ms | 153 KB | 39% | $0/mo | Optional |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 75ms | 91 KB | 43% | $0/mo | Optional |
www.gstatic.com www.gstatic.com | Other | 62ms | 0 KB | 49% | $0/mo | Optional |
These scripts may cost more than they're worth
- www.sbnation.com adds 441ms and costs ~$3/month
- www.sbnation.com adds 368ms and costs ~$2/month
- securepubads.g.doubleclick.net adds 332ms and costs ~$2/month
- www.sbnation.com adds 315ms and costs ~$2/month
- Unattributable adds 259ms and costs ~$1/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.sbnation.com takes 441ms 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.sbnation.com takes 368ms 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 332ms 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
69% 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.sbnation.com takes 315ms 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 259ms 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
50% of cdn.concert.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