Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

SEO

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

3.59 s

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

10.68 s

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

119 ms

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.

4.45 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.

10.74 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 s

Checks

7 PASS 5 REVIEW 3 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (1.9 MiB of 1.9 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

Page Weight Inventory

Action

50 resources · 1.9 MB · 64 KB savings available

FIX

50 resources · 1.9 MB · 64 KB savings available

Page weight 940 KB over 1MB target

Got: 1.9 MB Expected: ≤ 1 MB

~64 KB of savings available

49 third-party resources (100% of weight)

3 resources over 200KB

50 resources · 1.9 MiB · 49 third-party 939.6 KiB over 1MB target

Media 35% · 680.6 KiB

Image 33% · 650.5 KiB

Document 16% · 319.5 KiB

JavaScript 8% · 151.0 KiB

Other 4% · 72.3 KiB

Font 3% · 62.3 KiB

CSS 1% · 27.3 KiB

~64.2 KiB of savings available

Remove unused JavaScript: 64.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

50 resources			1.9 MiB

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

Page Weight Budget

Action

1.9 MB transferred, 50 requests

REVIEW

1.9 MB transferred, 50 requests

Page weighs 4.1 MB (1.9 MB transferred)

50 HTTP requests

Estimated 0.40 g CO2 per page load

1.9 MB transferred

50 requests

0.40 g CO2 per page load

Other 719.3 KiB 37%

Images 633.3 KiB 32%

HTML 319.1 KiB 16%

JavaScript 151.0 KiB 8%

Fonts 62.3 KiB 3%

Other 38.1 KiB 2%

CSS 22.8 KiB 1%

Other 17.6 KiB 1%

Other 0 B 0%

0 2.4 MB 4.9 MB

Approaching limit

Image Optimization

17 images, 0 KB saveable

REVIEW

17 images, 0 KB saveable

https://www.verisign.com/img/homepage/verisign-car... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

17 images 633 KB

0 oversized -0 KB

11 legacy format

1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

JS Execution Cost

Action

1002ms total JS execution

REVIEW

1002ms total JS execution

Unattributable: 368ms CPU time

https://www.verisign.com/js/components/index.abac3...: 292ms CPU time

https://cdn.cookielaw.org/scripttemplates/202505.2...: 229ms CPU time

https://www.verisign.com/: 112ms CPU time

Third-party scripts: 1002ms (100% of total)

Main Thread Breakdown

Script Evaluation 39% Other 32% Style & Layout 14% Script Parsing & Compilation 7% Parse HTML & CSS 6% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	368ms	63ms	0ms	3rd
https://www.verisign.com/js/components/index.abac3d478b2791ea252a61cf9fd8c2c045499a04a603dbcc10ec307d381c94c8.js	292ms	147ms	7ms	3rd
https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js	229ms	148ms	55ms	3rd
https://www.verisign.com/	112ms	21ms	5ms	3rd

JS Bundles

7 scripts, 64 KB unused

REVIEW

7 scripts, 64 KB unused

https://cdn.cookielaw.org/scripttemplates/202505.2...: 64 KB unused (54%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 64 KB

64 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js	119 KB	64 KB (54%)	✓	3rd
https://www.verisign.com/js/components/index.abac3d478b2791ea252a61cf9fd8c2c045499a04a603dbcc10ec307d381c94c8.js	23 KB	—	✓	3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js	9 KB	—	✓	3rd
blob:https://players.brightcove.net/99998dde-9dc5-4c65-aa9d-be88965e4efd	-0 KB	—	✓	3rd
blob:https://players.brightcove.net/2eaa137c-26c1-400d-9209-e27523208056	-0 KB	—	✓	3rd
blob:https://players.brightcove.net/37bea564-80da-47b8-8c88-a2439f79447f	-0 KB	—	✓	3rd
blob:https://players.brightcove.net/858fd32d-0fda-4703-b06c-8cd5c8c94b5c	-0 KB	—	✓	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

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

All text resources are properly compressed.

A+

Font Loading

3 fonts (62 KB)

PASS

3 fonts (62 KB)

3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

62 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Roboto-Semibold-latin.1... woff2 swap

Size 28 KB

Load time 9 ms

Start 363 ms

Risk FOUT — text flashes from fallback to web font

Inter-Semibold-latin.52... woff2 swap

Size 18 KB

Load time 12 ms

Start 364 ms

Risk FOUT — text flashes from fallback to web font

Inter-Regular-latin.296... woff2 swap

Size 17 KB

Load time 10 ms

Start 364 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

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

4 hints, 0 missing preconnects

PASS

4 hints, 0 missing preconnects

Page uses 4 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

—

prefetch

—

4 resource hints configured

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

Network Waterfall

50 requests over 1504ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

100% of JavaScript execution is third-party

First-party Third-party 1002ms · 162KB · $3/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	368ms	0 KB	—	$1/mo	Costly
www.verisign.com www.verisign.com	Other	292ms	23 KB	—	$1/mo	Costly
OneTrust cdn.cookielaw.org	Consent	229ms	119 KB	54%	$1/mo	Essential
www.verisign.com www.verisign.com	Other	112ms	20 KB	—	$0/mo	Optional

Unattributable

Other

Costly

Execution 368ms

Transfer 0 KB

Monthly Cost $1/mo

www.verisign.com

Other

Costly

Execution 292ms

Transfer 23 KB

Monthly Cost $1/mo

OneTrust

Consent

Essential

Execution 229ms

Transfer 119 KB

Unused 54%

Monthly Cost $1/mo

www.verisign.com

Other

Optional

Execution 112ms

Transfer 20 KB

Monthly Cost $0/mo

These scripts may cost more than they're worth

Unattributable adds 368ms and costs ~$1/month
www.verisign.com adds 292ms and costs ~$1/month

100% 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 368ms 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.verisign.com takes 292ms 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

54% of OneTrust'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.