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.
15.87 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
36.09 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.98 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.
18.44 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.
50.04 s
Page Load Progression
428 ms 856 ms 1.3 s 1.7 s 2.1 s
2.6 s
3.0 s
3.4 sFPage Weight BudgetAction8.4 MB transferred, 618 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
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 CostAction16808ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.foxsports.com/_nuxt/CdHbt080.js | 2719ms | 2259ms | 9ms | 3rd |
| Unattributable | 2504ms | 547ms | 0ms | 3rd |
| https://www.foxsports.com/ | 2161ms | 58ms | 15ms | 3rd |
| https://cdn.taboola.com/libtrc/foxsports1/loader.js | 980ms | 572ms | 122ms | 3rd |
| https://prod.fennec.atp.fox/js/fennec.js | 892ms | 755ms | 131ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 862ms | 714ms | 69ms | 3rd |
| https://cdn.amplitude.com/script/d05807e0a0814e4fb0e91401ac0367d5.experiment.js | 574ms | 478ms | 14ms | 3rd |
| https://cdn.segment.com/next-integrations/integrations/vendor/commons.59560acdd69ed701c941.js.gz | 546ms | 525ms | 6ms | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 512ms | 370ms | 140ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-0B25ZK3BYS&cx=c>m=4e64h1 | 426ms | 368ms | 51ms | 3rd |
Showing top 10 of 37 scripts
FJS BundlesAction311 scripts, 2.0 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.foxsports.com/_nuxt/CdHbt080.js | 822 KB | 551 KB (67%) | ✓ | 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 | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://cdn.taboola.com/libtrc/foxsports1/loader.js | 320 KB | 138 KB (49%) | ✓ | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 259 KB | 137 KB (60%) | ✓ | 3rd |
| https://mssl.fwmrm.net/libs/adm/6.55.0/AdManager.js | 87 KB | 76 KB (87%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-58Q95H24XC&l=ocConnectWidgetTracker&cx=c>m=4e64h1 | 149 KB | 72 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-0B25ZK3BYS&cx=c>m=4e64h1 | 167 KB | 67 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PK78SWB&l=ocConnectWidgetTracker | 134 KB | 61 KB (45%) | ✓ | 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 InventoryAction618 resources · 8.4 MB · 2.0 MB savings availableFIX
~2.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 618 resources | 8.4 MiB | ||||||
BImage Optimization86 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
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 Loading5 fonts (184 KB)PASS
Web fonts
5
184 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- 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 ~27 KB and ~54 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints176 hints, 0 missing preconnectsPASS
Current Resource Hints
176 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=90 (1 minute)PASS
max-age=90
| Directive | Value | Meaning |
|---|---|---|
| max-age | 90 | Cache for 1 minute |
Network Waterfall618 requests over 6289msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.foxsports.com www.foxsports.com | Other | 2719ms | 822 KB | 67% | $51/mo | Costly |
Unattributable Unattributable | Other | 2504ms | 0 KB | — | $47/mo | Costly |
www.foxsports.com www.foxsports.com | Other | 2161ms | 197 KB | — | $41/mo | Costly |
cdn.taboola.com cdn.taboola.com | Other | 980ms | 320 KB | 49% | $18/mo | Costly |
prod.fennec.atp.fox prod.fennec.atp.fox | Other | 892ms | 193 KB | — | $17/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 862ms | 0 KB | 49% | $16/mo | Costly |
Amplitude cdn.amplitude.com | Analytics | 574ms | 44 KB | 58% | $11/mo | Costly |
Segment cdn.segment.com | Analytics | 546ms | 22 KB | — | $10/mo | Costly |
cdn.ketchjs.com cdn.ketchjs.com | Other | 512ms | 259 KB | 60% | $10/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 426ms | 167 KB | 40% | $8/mo | Costly |
strike.fox.com strike.fox.com | Other | 404ms | 133 KB | 39% | $8/mo | Costly |
websdk.appsflyersdk.com websdk.appsflyersdk.com | Other | 361ms | 15 KB | — | $7/mo | Costly |
www.foxsports.com www.foxsports.com | Other | 357ms | 0 KB | — | $7/mo | Costly |
cdn.us.heap-api.com cdn.us.heap-api.com | Other | 295ms | 75 KB | — | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 291ms | 134 KB | 45% | $5/mo | Costly |
snippet.minute-ly.com snippet.minute-ly.com | Other | 287ms | 56 KB | 43% | $5/mo | Costly |
pm-widget.taboola.com pm-widget.taboola.com | Other | 266ms | 24 KB | — | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 202ms | 149 KB | 48% | $4/mo | Costly |
b2b-static.oddschecker.com b2b-static.oddschecker.com | Other | 183ms | 35 KB | — | $3/mo | Optional |
b2b-static.oddschecker.com b2b-static.oddschecker.com | Other | 173ms | 3 KB | — | $3/mo | Optional |
vidstat.taboola.com vidstat.taboola.com | Other | 165ms | 28 KB | — | $3/mo | Optional |
www.foxsports.com www.foxsports.com | Other | 149ms | 8 KB | — | $3/mo | Optional |
strike.fox.com strike.fox.com | Other | 146ms | 40 KB | — | $3/mo | Optional |
tags.tiqcdn.com tags.tiqcdn.com | Other | 145ms | 14 KB | — | $3/mo | Optional |
Segment cdn.segment.com | Analytics | 137ms | 9 KB | — | $3/mo | Optional |
vidstat.taboola.com vidstat.taboola.com | Other | 133ms | 28 KB | — | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 121ms | 142 KB | 41% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 112ms | 138 KB | 42% | $2/mo | Optional |
b2b-static.oddschecker.com b2b-static.oddschecker.com | Other | 103ms | 44 KB | — | $2/mo | Optional |
www.knotch-cdn.com www.knotch-cdn.com | Other | 103ms | 19 KB | — | $2/mo | Optional |
static.chartbeat.com static.chartbeat.com | Other | 98ms | 25 KB | — | $2/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 93ms | 21 KB | — | $2/mo | Optional |
Segment cdn.segment.com | Analytics | 71ms | 64 KB | 63% | $1/mo | Optional |
d2yyd1h5u9mauk.cloudfront.net d2yyd1h5u9mauk.cloudfront.net | Other | 67ms | 31 KB | — | $1/mo | Optional |
apv-launcher.minute-ly.com apv-launcher.minute-ly.com | Other | 65ms | 65 KB | — | $1/mo | Optional |
static.foxnews.com static.foxnews.com | Other | 53ms | 32 KB | — | $1/mo | Optional |
mssl.fwmrm.net mssl.fwmrm.net | Other | 52ms | 87 KB | 87% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.foxsports.com adds 2719ms and costs ~$51/month
- Unattributable adds 2504ms and costs ~$47/month
- www.foxsports.com adds 2161ms and costs ~$41/month
- cdn.taboola.com adds 980ms and costs ~$18/month
- prod.fennec.atp.fox adds 892ms and costs ~$17/month
- www.gstatic.com adds 862ms and costs ~$16/month
- Amplitude adds 574ms and costs ~$11/month
- Segment adds 546ms and costs ~$10/month
- cdn.ketchjs.com adds 512ms and costs ~$10/month
- Google Tag Manager adds 426ms and costs ~$8/month
- strike.fox.com adds 404ms and costs ~$8/month
- websdk.appsflyersdk.com adds 361ms and costs ~$7/month
- www.foxsports.com adds 357ms and costs ~$7/month
- cdn.us.heap-api.com adds 295ms and costs ~$6/month
- Google Tag Manager adds 291ms and costs ~$5/month
- snippet.minute-ly.com adds 287ms and costs ~$5/month
- pm-widget.taboola.com adds 266ms and costs ~$5/month
- Google Tag Manager adds 202ms and costs ~$4/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.foxsports.com takes 2719ms 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
67% of www.foxsports.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
Unattributable takes 2504ms 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.foxsports.com takes 2161ms 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.taboola.com takes 980ms 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
prod.fennec.atp.fox takes 892ms 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 862ms 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
Amplitude takes 574ms 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 Amplitude'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
Segment takes 546ms 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.ketchjs.com takes 512ms 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
60% of cdn.ketchjs.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 426ms 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
strike.fox.com takes 404ms 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
websdk.appsflyersdk.com takes 361ms 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.foxsports.com takes 357ms 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.us.heap-api.com takes 295ms 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 291ms 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
snippet.minute-ly.com takes 287ms 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
pm-widget.taboola.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
Google Tag Manager takes 202ms 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
63% of Segment'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
87% of mssl.fwmrm.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