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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
52
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
79
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.16 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.84 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

6.67 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.092

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

11.22 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.

33.15 s

Page Load Progression

472 ms
943 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
4.2 MB transferred, 402 requests
FIX
4.2 MB transferred, 402 requests
Critical::
Page weighs 13.6 MB (4.2 MB transferred)
Warning::
JavaScript is 2.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.7 MB
Warning::
Images are 1.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.0 MB
Warning::
402 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.89 g CO2 per page load
4.2 MB / 2.4 MB budget
4.2 MB transferred
402 requests
0.89 g CO2 per page load
JavaScript 2.7 MiB 65%
Images 1.0 MiB 24%
Other 237.4 KiB 5%
HTML 114.4 KiB 3%
Other 68.4 KiB 2%
Other 59.4 KiB 1%
Fonts 8.0 KiB 0%
Other 2.5 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

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.

Why this matters

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.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
81% third-party, 0 ms blocking
FIX
81% third-party, 0 ms blocking
Warning::
Third-party code accounts for 81% of page weight (3.4 MiB of 4.2 MiB)
Info::
Third-party blocking time is low (0 ms)
19%
81%
First-party Third-party
F
JS Execution Cost
Action
21114ms total JS execution
FIX
21114ms total JS execution
Warning::
Unattributable: 3008ms CPU time
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 2630ms CPU time
Warning::
https://cdn.taboola.com/libtrc/usatodaydemo/loader...: 2219ms CPU time
Warning::
https://www.usatoday.com/: 1827ms CPU time
Warning::
https://www.usatoday.com/tangstatic/js/pbjsandwich...: 1575ms CPU time
Warning::
Third-party scripts: 16793ms (80% of total)

Main Thread Breakdown

Script Evaluation 70% Other 14% Style & Layout 6% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
Unattributable3008ms830ms0ms3rd
https://cdn.confiant-integrations.net/gptprebidnativevideo/202601281034/wrap.js2630ms2327ms87ms3rd
https://cdn.taboola.com/libtrc/usatodaydemo/loader.js2219ms1563ms256ms3rd
https://www.usatoday.com/1827ms575ms45ms1st
https://www.usatoday.com/tangstatic/js/pbjsandwichdirecta9-q1a2z3a44d3739.min.js1575ms1423ms32ms1st
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js1152ms1038ms53ms3rd
https://jsconfig.adsafeprotected.com/jsconfig/jload/922805?cbName=__IntegralAS__5673&anId=922805&campId=320x50&pubId=13220208&chanId=23322595739&placementId=7268153005&pubCreative=138552889095&pubOrder=4027050623&cb=1488599944&adsafe_par=&impId=5ef454c2-3055-11f1-854e-ee562125d6b5&custom2=direct&custom3=home-front1011ms893ms3ms3rd
https://vidstat.taboola.com/lite-unit/5.7.0/UnitFeedManagerMobile.min.js848ms684ms9ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js687ms456ms128ms3rd
https://vidstat.taboola.com/vpaid/units/36_0_8/infra/cmTagFEED_MANAGER.js565ms463ms87ms3rd

Showing top 10 of 38 scripts

F
JS Bundles
Action
83 scripts, 1.1 MB unused
FIX
83 scripts, 1.1 MB unused
Warning::
https://cdn.taboola.com/libtrc/usatodaydemo/loader...: 134 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 80 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 80 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 80 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 80 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.1 MB
1173 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.taboola.com/libtrc/usatodaydemo/loader.js356 KB134 KB (38%)✓3rd
https://cdn.confiant-integrations.net/gptprebidnativevideo/202601281034/wrap.js167 KB80 KB (48%)✓3rd
https://cdn.confiant-integrations.net/gptprebidnativevideo/202601281034/wrap.js167 KB80 KB (48%)✓3rd
https://cdn.confiant-integrations.net/gptprebidnativevideo/202601281034/wrap.js0 KB80 KB (48%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js182 KB80 KB (44%)✓3rd
https://vidstat.taboola.com/vpaid/units/36_0_8/infra/cmTagFEED_MANAGER.js114 KB68 KB (59%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QQ6YP2J211146 KB58 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-994302621&cx=c&gtm=4e6411h1140 KB55 KB (39%)✓3rd
https://vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/TBrubiconPrebidHandler.js55 KB51 KB (92%)✓3rd
https://vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/TBPrebidHandler.js74 KB45 KB (61%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store
Info::
ETag present — enables conditional (304) responses
Cache-Control

no-store

DirectiveValueMeaning
no-store—Never cache this response
B
Image Optimization
161 images, 0 KB saveable
REVIEW
161 images, 0 KB saveable
Info::
All images are well-optimized
161 images 1.0 MB
0 oversized -0 KB
78 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
1 fonts (8 KB)
PASS
1 fonts (8 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

8 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.2 s LCP 2.8 sdata:application/font-woff2;charset=utf-8;base64,d09GMgABAAAAACAgABQAAAAAOqwAAB+yAAICjwAAAAAAAAAAAA…font-woff2;charset=utf-... data:application/font-woff2;charset=utf-8;base64,d09GMgABAAAAACAgABQAAAAAOqwAAB+yAAICjwAAAAAAAAAAAA… — 8.0 KiB — 0 ms — font-display: swap
font-woff2;charset=utf-... woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
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 Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
53 hints, 0 missing preconnects
PASS
53 hints, 0 missing preconnects
Info::
Page uses 53 resource hint(s)

Current Resource Hints

preconnect
+7
17
preload
+3
13
dns-prefetch
+13
23
prefetch
—

53 resource hints configured

Network Waterfall
402 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
80% of JavaScript execution is third-party
First-party Third-party 16793ms · 1848KB · $290/mo
Unattributable
Other
Costly
Execution 3008ms
Transfer 0 KB
Monthly Cost $52/mo
cdn.confiant-integrations.net
Other
Costly
Execution 2630ms
Transfer 0 KB
Unused 48%
Monthly Cost $45/mo
cdn.taboola.com
Other
Costly
Execution 2219ms
Transfer 356 KB
Unused 38%
Monthly Cost $38/mo
pagead2.googlesyndication.com
Other
Costly
Execution 1152ms
Transfer 73 KB
Unused 41%
Monthly Cost $20/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 1011ms
Transfer 4 KB
Monthly Cost $17/mo
vidstat.taboola.com
Other
Costly
Execution 848ms
Transfer 29 KB
Monthly Cost $15/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 687ms
Transfer 182 KB
Unused 44%
Monthly Cost $12/mo
vidstat.taboola.com
Other
Costly
Execution 565ms
Transfer 114 KB
Unused 59%
Monthly Cost $10/mo
Google Tag Manager
Tag Manager
Costly
Execution 339ms
Transfer 140 KB
Unused 39%
Monthly Cost $6/mo
client.aps.amazon-adsystem.com
Other
Costly
Execution 323ms
Transfer 82 KB
Monthly Cost $6/mo
static.adsafeprotected.com
Other
Costly
Execution 322ms
Transfer 0 KB
Monthly Cost $6/mo
www.usatoday.com
Other
Costly
Execution 317ms
Transfer 0 KB
Unused 25%
Monthly Cost $5/mo
deeperdive.ai
Other
Costly
Execution 300ms
Transfer 82 KB
Unused 48%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 278ms
Transfer 146 KB
Unused 40%
Monthly Cost $5/mo
pm-widget.taboola.com
Other
Costly
Execution 242ms
Transfer 24 KB
Monthly Cost $4/mo
pixel.adsafeprotected.com
Other
Costly
Execution 238ms
Transfer 92 KB
Unused 39%
Monthly Cost $4/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 238ms
Transfer 4 KB
Monthly Cost $4/mo
vidstat.taboola.com
Other
Costly
Execution 217ms
Transfer 87 KB
Unused 49%
Monthly Cost $4/mo
Mixpanel
Analytics
Optional
Execution 181ms
Transfer 32 KB
Monthly Cost $3/mo
cdn.brandmetrics.com
Other
Optional
Execution 169ms
Transfer 18 KB
Monthly Cost $3/mo
secure.cdn.fastclick.net
Other
Optional
Execution 163ms
Transfer 22 KB
Monthly Cost $3/mo
vidstat.taboola.com
Other
Optional
Execution 163ms
Transfer 74 KB
Unused 61%
Monthly Cost $3/mo
config.aps.amazon-adsystem.com
Other
Optional
Execution 154ms
Transfer 4 KB
Monthly Cost $3/mo
ep2.adtrafficquality.google
Other
Optional
Execution 147ms
Transfer 8 KB
Monthly Cost $3/mo
vidstat.taboola.com
Other
Optional
Execution 141ms
Transfer 48 KB
Unused 94%
Monthly Cost $2/mo
pixel.adsafeprotected.com
Other
Optional
Execution 130ms
Transfer 92 KB
Unused 39%
Monthly Cost $2/mo
static.criteo.net
Other
Optional
Execution 109ms
Transfer 15 KB
Monthly Cost $2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 107ms
Transfer 34 KB
Monthly Cost $2/mo
c2.taboola.com
Other
Optional
Execution 105ms
Transfer 19 KB
Monthly Cost $2/mo
static.adsafeprotected.com
Other
Optional
Execution 90ms
Transfer 5 KB
Monthly Cost $2/mo
connectid.analytics.yahoo.com
Other
Optional
Execution 76ms
Transfer 9 KB
Monthly Cost $1/mo
vidstat.taboola.com
Other
Optional
Execution 63ms
Transfer 55 KB
Unused 92%
Monthly Cost $1/mo
cdn.confiant-integrations.net
Other
Optional
Execution 61ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 3008ms and costs ~$52/month
  • cdn.confiant-integrations.net adds 2630ms and costs ~$45/month
  • cdn.taboola.com adds 2219ms and costs ~$38/month
  • pagead2.googlesyndication.com adds 1152ms and costs ~$20/month
  • jsconfig.adsafeprotected.com adds 1011ms and costs ~$17/month
  • vidstat.taboola.com adds 848ms and costs ~$15/month
  • securepubads.g.doubleclick.net adds 687ms and costs ~$12/month
  • vidstat.taboola.com adds 565ms and costs ~$10/month
  • Google Tag Manager adds 339ms and costs ~$6/month
  • client.aps.amazon-adsystem.com adds 323ms and costs ~$6/month
  • static.adsafeprotected.com adds 322ms and costs ~$6/month
  • www.usatoday.com adds 317ms and costs ~$5/month
  • deeperdive.ai adds 300ms and costs ~$5/month
  • Google Tag Manager adds 278ms and costs ~$5/month
  • pm-widget.taboola.com adds 242ms and costs ~$4/month
  • pixel.adsafeprotected.com adds 238ms and costs ~$4/month
  • jsconfig.adsafeprotected.com adds 238ms and costs ~$4/month
  • vidstat.taboola.com adds 217ms and costs ~$4/month

80% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

Unattributable takes 3008ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.confiant-integrations.net takes 2630ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.taboola.com takes 2219ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

pagead2.googlesyndication.com takes 1152ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

jsconfig.adsafeprotected.com takes 1011ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

vidstat.taboola.com takes 848ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

securepubads.g.doubleclick.net takes 687ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

vidstat.taboola.com takes 565ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

59% of vidstat.taboola.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Google Tag Manager takes 339ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

client.aps.amazon-adsystem.com takes 323ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.adsafeprotected.com takes 322ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.usatoday.com takes 317ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

deeperdive.ai takes 300ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 278ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

pm-widget.taboola.com takes 242ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

pixel.adsafeprotected.com takes 238ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

jsconfig.adsafeprotected.com takes 238ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

vidstat.taboola.com takes 217ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

61% of vidstat.taboola.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

94% of vidstat.taboola.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

92% of vidstat.taboola.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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