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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
61
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
72
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.

646 ms

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

884 ms

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

1.04 s

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

0.041

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

4.53 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.

7.47 s

Page Load Progression

1.7 s
3.5 s
5.2 s
6.9 s
8.6 s
10.4 s
12.1 s
13.8 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
4.5 MB transferred, 402 requests
FIX
4.5 MB transferred, 402 requests
Critical::
Page weighs 14.7 MB (4.5 MB transferred)
Warning::
JavaScript is 3.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.3 MB
Warning::
402 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.95 g CO2 per page load
4.5 MB / 2.4 MB budget
4.5 MB transferred
402 requests
0.95 g CO2 per page load
JavaScript 3.3 MiB 72%
Images 537.1 KiB 12%
Other 248.0 KiB 5%
HTML 204.5 KiB 4%
Other 95.0 KiB 2%
Other 89.2 KiB 2%
Other 57.6 KiB 1%
CSS 32.8 KiB 1%
Fonts 31.5 KiB 1%
Other 4.1 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

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
91% third-party, 0 ms blocking
FIX
91% third-party, 0 ms blocking
Warning::
Third-party code accounts for 91% of page weight (4.2 MiB of 4.5 MiB)
Info::
Third-party blocking time is low (0 ms)
91%
First-party Third-party
F
JS Execution Cost
Action
5754ms total JS execution
FIX
5754ms total JS execution
Warning::
Unattributable: 708ms CPU time
Warning::
https://cdn.taboola.com/libtrc/usatodaydemo/loader...: 672ms CPU time
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 641ms CPU time
Warning::
https://www.usatoday.com/: 594ms CPU time
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 563ms CPU time
Warning::
Third-party scripts: 4806ms (84% of total)

Main Thread Breakdown

Script Evaluation 69% Other 14% Style & Layout 7% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
Unattributable708ms127ms0ms3rd
https://cdn.taboola.com/libtrc/usatodaydemo/loader.js672ms490ms49ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js641ms565ms15ms3rd
https://www.usatoday.com/594ms153ms9ms1st
https://cdn.confiant-integrations.net/gptprebidnativevideo/202601281034/wrap.js563ms463ms46ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js337ms285ms33ms3rd
https://vidstat.taboola.com/lite-unit/5.7.0/UnitFeedManagerDesktop.min.js259ms196ms2ms3rd
https://vidstat.taboola.com/vpaid/units/36_0_8/infra/cmTagFEED_MANAGER.js194ms173ms14ms3rd
https://www.usatoday.com/tangstatic/js/pbjsandwichdirecta9-q1a2z3a44d3739.min.js175ms136ms11ms1st
https://www.googletagmanager.com/gtag/destination?id=AW-994302621&cx=c&gtm=4e6411173ms148ms23ms3rd

Showing top 10 of 25 scripts

F
JS Bundles
Action
91 scripts, 1.1 MB unused
FIX
91 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://securepubads.g.doubleclick.net/pagead/mana...: 78 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.confiant-integrations.net/gptprebidnat...: 76 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vidstat.taboola.com/vpaid/units/36_0_8/inf...: 67 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QQ6Y...: 59 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.1 MB
1082 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.taboola.com/libtrc/usatodaydemo/loader.js356 KB134 KB (38%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js182 KB78 KB (43%)✓3rd
https://cdn.confiant-integrations.net/gptprebidnativevideo/202601281034/wrap.js167 KB76 KB (46%)✓3rd
https://vidstat.taboola.com/vpaid/units/36_0_8/infra/cmTagFEED_MANAGER.js114 KB67 KB (59%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QQ6YP2J211146 KB59 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-994302621&cx=c&gtm=4e6411140 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/TBopenxPrebidHandler.js47 KB46 KB (97%)✓3rd
https://vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/TBPrebidHandler.js74 KB45 KB (62%)✓3rd
https://vidstat.taboola.com/vpaid/vPlayer/player/v18.0.4/TBpulsepointPrebidHandler.js47 KB44 KB (95%)✓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
123 images, 0 KB saveable
REVIEW
123 images, 0 KB saveable
Info::
All images are well-optimized
123 images 537 KB
0 oversized -0 KB
79 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
4 fonts (32 KB)
PASS
4 fonts (32 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

32 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 646 ms LCP 884 msdata: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: swaphttps://deeperdive.ai/fonts/poppins/Poppins-SemiBold.woff2Poppins-SemiBold.woff2 https://deeperdive.ai/fonts/poppins/Poppins-SemiBold.woff2 — 7.9 KiB — 0 ms — font-display: swaphttps://deeperdive.ai/fonts/poppins/Poppins-Light.woff2Poppins-Light.woff2 https://deeperdive.ai/fonts/poppins/Poppins-Light.woff2 — 7.7 KiB — 0 ms — font-display: swaphttps://deeperdive.ai/fonts/poppins/Poppins-Regular.woff2Poppins-Regular.woff2 https://deeperdive.ai/fonts/poppins/Poppins-Regular.woff2 — 7.8 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
Poppins-SemiBold.woff2 woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Poppins-Light.woff2 woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Poppins-Regular.woff2 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
84% of JavaScript execution is third-party
First-party Third-party 4806ms · 1711KB · $83/mo
Unattributable
Other
Costly
Execution 708ms
Transfer 0 KB
Monthly Cost $12/mo
cdn.taboola.com
Other
Costly
Execution 672ms
Transfer 356 KB
Unused 38%
Monthly Cost $12/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 641ms
Transfer 182 KB
Unused 43%
Monthly Cost $11/mo
cdn.confiant-integrations.net
Other
Costly
Execution 563ms
Transfer 167 KB
Unused 46%
Monthly Cost $10/mo
pagead2.googlesyndication.com
Other
Costly
Execution 337ms
Transfer 73 KB
Unused 41%
Monthly Cost $6/mo
vidstat.taboola.com
Other
Costly
Execution 259ms
Transfer 28 KB
Monthly Cost $4/mo
vidstat.taboola.com
Other
Optional
Execution 194ms
Transfer 114 KB
Unused 59%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 173ms
Transfer 140 KB
Unused 39%
Monthly Cost $3/mo
jsconfig.adsafeprotected.com
Other
Optional
Execution 148ms
Transfer 4 KB
Monthly Cost $3/mo
jsconfig.adsafeprotected.com
Other
Optional
Execution 127ms
Transfer 4 KB
Monthly Cost $2/mo
jsconfig.adsafeprotected.com
Other
Optional
Execution 112ms
Transfer 4 KB
Monthly Cost $2/mo
pm-widget.taboola.com
Other
Optional
Execution 109ms
Transfer 24 KB
Monthly Cost $2/mo
static.adsafeprotected.com
Other
Optional
Execution 102ms
Transfer 0 KB
Monthly Cost $2/mo
pixel.adsafeprotected.com
Other
Optional
Execution 101ms
Transfer 92 KB
Unused 40%
Monthly Cost $2/mo
pixel.adsafeprotected.com
Other
Optional
Execution 101ms
Transfer 92 KB
Unused 39%
Monthly Cost $2/mo
Mixpanel
Analytics
Optional
Execution 96ms
Transfer 32 KB
Monthly Cost $2/mo
deeperdive.ai
Other
Optional
Execution 92ms
Transfer 82 KB
Unused 48%
Monthly Cost $2/mo
client.aps.amazon-adsystem.com
Other
Optional
Execution 88ms
Transfer 82 KB
Unused 43%
Monthly Cost $2/mo
www.usatoday.com
Other
Optional
Execution 67ms
Transfer 0 KB
Unused 25%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 59ms
Transfer 146 KB
Unused 40%
Monthly Cost $1/mo
vidstat.taboola.com
Other
Optional
Execution 57ms
Transfer 87 KB
Unused 50%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 708ms and costs ~$12/month
  • cdn.taboola.com adds 672ms and costs ~$12/month
  • securepubads.g.doubleclick.net adds 641ms and costs ~$11/month
  • cdn.confiant-integrations.net adds 563ms and costs ~$10/month
  • pagead2.googlesyndication.com adds 337ms and costs ~$6/month
  • vidstat.taboola.com adds 259ms and costs ~$4/month

84% 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 708ms 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 672ms 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 641ms 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 563ms 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 337ms 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 259ms 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

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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