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.

1.29 s

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

3.42 s

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

5.58 s

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

0.115

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

3.98 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.

28.09 s

Page Load Progression

802 ms

1.6 s

2.4 s

3.2 s

4.0 s

4.8 s

5.6 s

6.4 s

Checks

8 PASS 2 REVIEW 5 FIX

Page Weight Budget

Action

15.0 MB transferred, 204 requests

FIX

15.0 MB transferred, 204 requests

Page weighs 23.4 MB (15.0 MB transferred)

JavaScript is 2.4 MB — consider code splitting or lazy loading

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

Got: 2.4 MB

Fonts are 541 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 541 KB

204 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 3.2 g CO2 per page load

15.0 MB transferred

204 requests

3.2 g CO2 per page load

Other 11.5 MiB 77%

JavaScript 2.4 MiB 16%

Fonts 540.6 KiB 4%

Other 219.8 KiB 1%

Other 173.9 KiB 1%

Images 73.6 KiB 0%

HTML 59.1 KiB 0%

CSS 40.2 KiB 0%

Other 15.4 KiB 0%

Other 754 B 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

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.

Why this matters

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

Source: web.dev

Third-Party Impact

Action

94% third-party, 0 ms blocking

FIX

94% third-party, 0 ms blocking

Third-party code accounts for 94% of page weight (14.2 MiB of 15.0 MiB)

Third-party blocking time is low (0 ms)

94%

First-party Third-party

JS Execution Cost

Action

13051ms total JS execution

FIX

13051ms total JS execution

Unattributable: 2531ms CPU time

https://www.googletagmanager.com/gtm.js?id=GTM-WTN...: 2381ms CPU time

https://js.qualified.com/qualified.js?token=oerwbS...: 1044ms CPU time

https://dev.visualwebsiteoptimizer.com/cdn/edrv/va...: 998ms CPU time

https://matterport.com/_next/static/chunks/framewo...: 797ms CPU time

Third-party scripts: 10875ms (83% of total)

Main Thread Breakdown

Script Evaluation 63% Other 20% Script Parsing & Compilation 10%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	2531ms	237ms	0ms	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WTNN7W&l=dataLayer	2381ms	1925ms	278ms	3rd
https://js.qualified.com/qualified.js?token=oerwbSnkKEjaiD3g	1044ms	897ms	127ms	3rd
https://dev.visualwebsiteoptimizer.com/cdn/edrv/va_gq-d728c477f0f4777c8be7f1f120d0c70b.br.js	998ms	732ms	51ms	3rd
https://matterport.com/_next/static/chunks/framework-e597e73f0a8bedf3.js	797ms	734ms	13ms	1st
https://www.googletagmanager.com/gtag/js?id=G-W66Y5HELXX&cx=c&gtm=4e64k0h2	748ms	680ms	57ms	3rd
https://matterport.com/	669ms	28ms	1ms	1st
https://www.googletagmanager.com/gtag/js?id=DC-9563670	531ms	180ms	349ms	3rd
https://scripts.clarity.ms/0.8.59/clarity.js	470ms	406ms	13ms	3rd
https://connect.facebook.net/signals/config/885553628155258?v=2.9.303&r=stable&domain=matterport.com&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168	453ms	419ms	32ms	3rd

Showing top 10 of 25 scripts

JS Bundles

Action

88 scripts, 1.0 MB unused

FIX

88 scripts, 1.0 MB unused

https://matterport.com/_next/static/chunks/2135-ca...: 173 KB unused (90%)

Consider code splitting or tree shaking to reduce unused code.

https://matterport.com/_next/static/chunks/2135-ca...: 173 KB unused (90%)

Consider code splitting or tree shaking to reduce unused code.

https://matterport.com/_next/static/chunks/pages/_...: 108 KB unused (63%)

Consider code splitting or tree shaking to reduce unused code.

https://matterport.com/_next/static/chunks/9260-a5...: 89 KB unused (90%)

Consider code splitting or tree shaking to reduce unused code.

https://matterport.com/_next/static/chunks/9260-a5...: 89 KB unused (90%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.0 MB

1047 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://matterport.com/_next/static/chunks/2135-ca2d07f122fa631b.js	44 KB	173 KB (90%)	✓	1st
https://matterport.com/_next/static/chunks/2135-ca2d07f122fa631b.js	0 KB	173 KB (90%)	✓	1st
https://matterport.com/_next/static/chunks/pages/_app-3ee91ba3dbd3cf3b.js	173 KB	108 KB (63%)	✓	1st
https://matterport.com/_next/static/chunks/9260-a517158332197e7a.js	35 KB	89 KB (90%)	✓	1st
https://matterport.com/_next/static/chunks/9260-a517158332197e7a.js	0 KB	89 KB (90%)	✓	1st
https://www.googletagmanager.com/gtag/js?id=G-W66Y5HELXX&cx=c&gtm=4e64k0h2	176 KB	66 KB (38%)	✓	3rd
https://dev.visualwebsiteoptimizer.com/cdn/edrv/va_gq-d728c477f0f4777c8be7f1f120d0c70b.br.js	97 KB	59 KB (61%)	✓	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WTNN7W&l=dataLayer	193 KB	58 KB (30%)	✓	3rd
https://js.qualified.com/qualified.js?token=oerwbSnkKEjaiD3g	117 KB	57 KB (49%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=DC-9563670	130 KB	56 KB (43%)	✓	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

Page Weight Inventory

Action

204 resources · 15.0 MB · 1.0 MB savings available

FIX

204 resources · 15.0 MB · 1.0 MB savings available

Page weight 14.0 MB over 1MB target

Got: 15.0 MB Expected: ≤ 1 MB

~1.0 MB of savings available

136 third-party resources (94% of weight)

6 resources over 200KB

204 resources · 15.0 MiB · 136 third-party 14.0 MiB over 1MB target

Media 77% · 11.5 MiB

JavaScript 17% · 2.6 MiB

Font 4% · 540.6 KiB

Other 1% · 219.3 KiB

Image 0% · 74.9 KiB

Document 0% · 60.5 KiB

CSS 0% · 44.7 KiB

~1.0 MiB of savings available

Remove unused JavaScript: 1.0 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

204 resources			15.0 MiB

Image Optimization

Action

36 images, 0 KB saveable

REVIEW

36 images, 0 KB saveable

https://images.ctfassets.net/icnj41gkyohw/5HI3zCkH... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://images.ctfassets.net/icnj41gkyohw/11Cdo027... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://images.ctfassets.net/icnj41gkyohw/5Df46F7J... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://images.ctfassets.net/icnj41gkyohw/6FQwXE0u... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

36 images 73 KB

0 oversized -0 KB

36 legacy format

4 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

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

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

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

HTTP Caching

public, max-age=0, must-revalidate

REVIEW

public, max-age=0, must-revalidate

Cache-Control header is set

Got: public, max-age=0, must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

public, max-age=0, must-revalidate

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

6 fonts (541 KB)

PASS

6 fonts (541 KB)

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

Web fonts

541 KB total

Render-blocking

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

02743a8d10a3d186-s.p.woff2 woff2 swap

Size 41 KB

Load time 56 ms

Start 82 ms

Risk FOUT — text flashes from fallback to web font

1e41be92c43b3255-s.p.woff2 woff2 swap

Size 37 KB

Load time 90 ms

Start 83 ms

Risk FOUT — text flashes from fallback to web font

26d4368bf94c0ec4-s.p.woff2 woff2 swap

Size 40 KB

Load time 83 ms

Start 83 ms

Risk FOUT — text flashes from fallback to web font

Inter-Regular.f1f0c35b.... woff2 swap

Size 97 KB

Load time 56 ms

Start 1.8 s

Risk FOUT — text flashes from fallback to web font

Inter-SemiBold.fcb100c7... woff2 swap

Size 104 KB

Load time 37 ms

Start 1.8 s

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

Inter-roman.var.b2129c0... woff2 swap

Size 222 KB

Load time 23 ms

Start 5.2 s

Risk FOUT — text flashes from fallback to web font

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 ~163 KB and ~326 ms

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

27 hints, 0 missing preconnects

PASS

27 hints, 0 missing preconnects

Page uses 27 resource hint(s)

Current Resource Hints

preconnect

—

preload

+10

dns-prefetch

—

prefetch

27 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

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall

204 requests over 6084ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

83% of JavaScript execution is third-party

First-party Third-party 10875ms · 1179KB · $62/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	2531ms	0 KB	—	$14/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	2381ms	193 KB	30%	$14/mo	Costly
js.qualified.com js.qualified.com	Other	1044ms	117 KB	49%	$6/mo	Costly
dev.visualwebsiteoptimizer.com dev.visualwebsiteoptimizer.com	Other	998ms	97 KB	61%	$6/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	748ms	176 KB	38%	$4/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	531ms	130 KB	43%	$3/mo	Costly
Microsoft Clarity scripts.clarity.ms	Session Replay	470ms	26 KB	—	$3/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	453ms	51 KB	—	$3/mo	Costly
js.qualified.com js.qualified.com	Other	435ms	97 KB	52%	$2/mo	Costly
Segment cdn.segment.com	Analytics	284ms	1 KB	—	$2/mo	Costly
Bing UET bat.bing.com	Advertising	268ms	16 KB	—	$2/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	191ms	97 KB	34%	$1/mo	Optional
dev.visualwebsiteoptimizer.com dev.visualwebsiteoptimizer.com	Other	98ms	44 KB	83%	$1/mo	Optional
LinkedIn Insight snap.licdn.com	Advertising	75ms	19 KB	—	$0/mo	Optional
Segment cdn.segment.com	Analytics	73ms	22 KB	—	$0/mo	Optional
www.redditstatic.com www.redditstatic.com	Other	72ms	19 KB	—	$0/mo	Optional
dev.visualwebsiteoptimizer.com dev.visualwebsiteoptimizer.com	Other	59ms	5 KB	—	$0/mo	Optional
dev.visualwebsiteoptimizer.com dev.visualwebsiteoptimizer.com	Other	57ms	26 KB	—	$0/mo	Optional
Bing UET bat.bing.com	Advertising	54ms	15 KB	—	$0/mo	Optional
Segment cdn.segment.com	Analytics	51ms	29 KB	—	$0/mo	Optional

Unattributable

Other

Costly

Execution 2531ms

Transfer 0 KB

Monthly Cost $14/mo

Google Tag Manager

Tag Manager

Costly

Execution 2381ms

Transfer 193 KB

Unused 30%

Monthly Cost $14/mo

js.qualified.com

Other

Costly

Execution 1044ms

Transfer 117 KB

Unused 49%

Monthly Cost $6/mo

dev.visualwebsiteoptimizer.com

Other

Costly

Execution 998ms

Transfer 97 KB

Unused 61%

Monthly Cost $6/mo

Google Tag Manager

Tag Manager

Costly

Execution 748ms

Transfer 176 KB

Unused 38%

Monthly Cost $4/mo

Google Tag Manager

Tag Manager

Costly

Execution 531ms

Transfer 130 KB

Unused 43%

Monthly Cost $3/mo

Microsoft Clarity

Session Replay

Costly

Execution 470ms

Transfer 26 KB

Monthly Cost $3/mo

Facebook Pixel

Advertising

Costly

Execution 453ms

Transfer 51 KB

Monthly Cost $3/mo

js.qualified.com

Other

Costly

Execution 435ms

Transfer 97 KB

Unused 52%

Monthly Cost $2/mo

Segment

Analytics

Costly

Execution 284ms

Transfer 1 KB

Monthly Cost $2/mo

Bing UET

Advertising

Costly

Execution 268ms

Transfer 16 KB

Monthly Cost $2/mo

Facebook Pixel

Advertising

Optional

Execution 191ms

Transfer 97 KB

Unused 34%

Monthly Cost $1/mo

dev.visualwebsiteoptimizer.com

Other

Optional

Execution 98ms

Transfer 44 KB

Unused 83%

Monthly Cost $1/mo

LinkedIn Insight

Advertising

Optional

Execution 75ms

Transfer 19 KB

Monthly Cost $0/mo

Segment

Analytics

Optional

Execution 73ms

Transfer 22 KB

Monthly Cost $0/mo

www.redditstatic.com

Other

Optional

Execution 72ms

Transfer 19 KB

Monthly Cost $0/mo

dev.visualwebsiteoptimizer.com

Other

Optional

Execution 59ms

Transfer 5 KB

Monthly Cost $0/mo

dev.visualwebsiteoptimizer.com

Other

Optional

Execution 57ms

Transfer 26 KB

Monthly Cost $0/mo

Bing UET

Advertising

Optional

Execution 54ms

Transfer 15 KB

Monthly Cost $0/mo

Segment

Analytics

Optional

Execution 51ms

Transfer 29 KB

Monthly Cost $0/mo

These scripts may cost more than they're worth

Unattributable adds 2531ms and costs ~$14/month
Google Tag Manager adds 2381ms and costs ~$14/month
js.qualified.com adds 1044ms and costs ~$6/month
dev.visualwebsiteoptimizer.com adds 998ms and costs ~$6/month
Google Tag Manager adds 748ms and costs ~$4/month
Google Tag Manager adds 531ms and costs ~$3/month
Microsoft Clarity adds 470ms and costs ~$3/month
Facebook Pixel adds 453ms and costs ~$3/month
js.qualified.com adds 435ms and costs ~$2/month
Segment adds 284ms and costs ~$2/month
Bing UET adds 268ms and costs ~$2/month

83% 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 2531ms 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 2381ms 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

js.qualified.com takes 1044ms 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

dev.visualwebsiteoptimizer.com takes 998ms 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 dev.visualwebsiteoptimizer.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 748ms 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 531ms 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

Microsoft Clarity takes 470ms 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

Facebook Pixel takes 453ms 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

js.qualified.com takes 435ms 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

52% of js.qualified.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

Segment takes 284ms 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

Bing UET takes 268ms 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

83% of dev.visualwebsiteoptimizer.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.