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.
13.91 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
31.46 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.18 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.
13.91 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.
32.11 s
Page Load Progression
375 ms 750 ms 1.1 s 1.5 s 1.9 s 2.2 s
2.6 s
3.0 sFPage Weight BudgetAction4.9 MB transferred, 156 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
FJS Execution CostAction9794ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 1941ms | 1651ms | 55ms | 3rd |
| https://www.sbnation.com/_next/static/chunks/pages/_app-f12a555ef0f2ad9c.js | 1681ms | 1234ms | 307ms | 3rd |
| https://www.sbnation.com/_next/static/chunks/framework-ae5702bffa1bfba7.js | 1303ms | 1121ms | 19ms | 3rd |
| Unattributable | 970ms | 69ms | 0ms | 3rd |
| https://cdn.concert.io/lib/concert-ads/v2-latest/concert_ads.js | 808ms | 383ms | 54ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WQ5FM5W | 496ms | 414ms | 76ms | 3rd |
| https://www.sbnation.com/ | 436ms | 17ms | 5ms | 3rd |
| https://cdn.doubleverify.com/dv-measurements9761.js | 316ms | 261ms | 36ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 305ms | 177ms | 101ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-926030959&cx=c>m=4e64h1 | 223ms | 190ms | 31ms | 3rd |
Showing top 10 of 21 scripts
FJS BundlesAction53 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 | 99 KB (53%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-926030959&cx=c>m=4e64h1 | 138 KB | 70 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WQ5FM5W | 185 KB | 56 KB (30%) | ✓ | 3rd |
| https://cdn.concert.io/lib/concert-ads/v2-latest/concert_ads.js | 104 KB | 42 KB (48%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 38 KB (42%) | ✓ | 3rd |
| https://cdn.doubleverify.com/dv-measurements9761.js | 94 KB | 37 KB (39%) | ✓ | 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 InventoryAction156 resources · 4.9 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 156 resources | 4.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization26 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 Hints22 hints, 0 missing preconnectsPASS
Current Resource Hints
22 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
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 Waterfall156 requests over 5446msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 1941ms | 188 KB | 53% | $11/mo | Costly |
www.sbnation.com www.sbnation.com | Other | 1681ms | 648 KB | 44% | $10/mo | Costly |
www.sbnation.com www.sbnation.com | Other | 1303ms | 42 KB | — | $7/mo | Costly |
Unattributable Unattributable | Other | 970ms | 0 KB | — | $6/mo | Costly |
cdn.concert.io cdn.concert.io | Other | 808ms | 104 KB | 48% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 496ms | 185 KB | 30% | $3/mo | Costly |
www.sbnation.com www.sbnation.com | Other | 436ms | 52 KB | — | $2/mo | Costly |
cdn.doubleverify.com cdn.doubleverify.com | Other | 316ms | 94 KB | 39% | $2/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 305ms | 0 KB | 49% | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 223ms | 138 KB | 51% | $1/mo | Costly |
btloader.com btloader.com | Other | 207ms | 37 KB | — | $1/mo | Costly |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 197ms | 91 KB | 42% | $1/mo | Optional |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 196ms | 73 KB | 43% | $1/mo | Optional |
cdn.concert.io cdn.concert.io | Other | 137ms | 32 KB | — | $1/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 112ms | 34 KB | — | $1/mo | Optional |
www.sbnation.com www.sbnation.com | Other | 85ms | 31 KB | — | $0/mo | Optional |
www.googletagservices.com www.googletagservices.com | Other | 83ms | 34 KB | — | $0/mo | Optional |
www.sbnation.com www.sbnation.com | Other | 83ms | 32 KB | — | $0/mo | Optional |
cdn.doubleverify.com cdn.doubleverify.com | Other | 74ms | 4 KB | — | $0/mo | Optional |
tps.doubleverify.com tps.doubleverify.com | Other | 72ms | 1 KB | — | $0/mo | Optional |
www.sbnation.com www.sbnation.com | Other | 69ms | 9 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- securepubads.g.doubleclick.net adds 1941ms and costs ~$11/month
- www.sbnation.com adds 1681ms and costs ~$10/month
- www.sbnation.com adds 1303ms and costs ~$7/month
- Unattributable adds 970ms and costs ~$6/month
- cdn.concert.io adds 808ms and costs ~$5/month
- Google Tag Manager adds 496ms and costs ~$3/month
- www.sbnation.com adds 436ms and costs ~$2/month
- cdn.doubleverify.com adds 316ms and costs ~$2/month
- www.gstatic.com adds 305ms and costs ~$2/month
- Google Tag Manager adds 223ms and costs ~$1/month
- btloader.com adds 207ms 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
securepubads.g.doubleclick.net takes 1941ms 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 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 1681ms 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 1303ms 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 970ms 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.concert.io takes 808ms 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
Google Tag Manager 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
www.sbnation.com takes 436ms 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.doubleverify.com takes 316ms 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.gstatic.com takes 305ms 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
Google Tag Manager takes 223ms 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
51% of Google Tag Manager'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
btloader.com takes 207ms 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