Browse & Analyze

Browse recent website audits and performance trends

Explore technology stacks detected across the web

Side-by-side technology comparisons and market share

Curated technology stacks and the sites that use them

Editorial deep-dives on the state of web performance

Browse and download favicons from analyzed websites

Learn

Common questions about BeaverCheck scores and checks

How we calculate scores across 100+ checks

The story behind BeaverCheck and the team

Practical guides to fix common web performance issues

Migration Guides

Step-by-step guides for moving between web technologies

Definitions for performance, SEO, and web platform terms

Contrast Checker

Check WCAG color contrast ratios between any two colors

Inspect HTTP response headers for any URL

Analyze SSL/TLS certificate details and chain

Look up DNS records for any domain

Redirect Checker

Trace the full redirect chain for any URL

Real-user INP and Core Web Vitals from Google's Chrome UX Report.

RESTful API for programmatic website audits

Embed an auto-updating health score badge on your site

https://www.alinasdogservices.co.uk

Performance

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

SCORE

82

GRADE

B

FIX

4

REVIEW

7

PASS

12

INFO

3

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

46

Performance

100

Accessibility

96

Best Practices

91

SEO

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

5.77 s

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

10.52 s

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

488 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.

7.46 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.

10.56 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

26

12 PASS 7 REVIEW 4 FIX

D

Third-Party Impact

Action

98% third-party, 0 ms blocking

FIX

98% third-party, 0 ms blocking

Third-party code accounts for 98% of page weight (1.4 MiB of 1.4 MiB)

Third-party blocking time is low (0 ms)

98%

First-party Third-party

D

JS Bundles

Action

11 scripts, 337 KB unused

FIX

11 scripts, 337 KB unused

https://www.gstatic.com/_/atari/_/js/k=atari.vw.en...: 93 KB unused (73%)

Consider code splitting or tree shaking to reduce unused code.

https://apis.google.com/_/scs/abc-static/_/js/k=ga...: 80 KB unused (75%)

Consider code splitting or tree shaking to reduce unused code.

https://www.gstatic.com/_/atari/_/js/k=atari.vw.en...: 71 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-1MQT...: 62 KB unused (37%)

Consider code splitting or tree shaking to reduce unused code.

https://www.gstatic.com/feedback/js/help/prod/serv...: 31 KB unused (80%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 337 KB

337 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=LLHPdb,sy2w,ws9Tlc,cEt90b,sy74,KUM7Z,MpJwZc,n73qwf,A4UTCb,sy2v,L1AAkb,aW3pY,RyvaUb,sy2r,sy37,owcnme,sy38,sy39,O6y8ed,mzzZzc,CHCSlb,qAKInc,sy3m,YXyON,sy3r,sy3q,iTeaXe,sy65,abQiW,sy12,sy11,sy10,syv,syu,sy3a,pxq3x,sy3b,syo,sy3c,sy3w,syw,sy28,sy3d,sy4t,sy64,EGNJFf,V3dDOb,sy2u,ENNBBf,syh,syf,syd,syn,syc,sy3g,yf2Bs,sy1c,sy1f,sy1b,sy19,sy1j,sy1h,sy1k,sy1m,sy1n,sy1i,sy1e,sy1a,sy1g,sy1o,sy1d,syr,sy35,fmklff,sy45,TGYpv,sy9,syy,sy4h,sy20,sy1z,sy4u,sy5z,gK4msf,XVMNvd,sy71,yxTchf,sy72,sy73,xQtZb,iSvg6e,N5Lqpc,sy3u,sy3v,sy3s,sy3t,sy3p,sy3x,sy3y,pc62j,qEW1W,oNFsLb,syi,syl,sym,sy3h,sy3i,iwfZq,m9oV,sy2y,RAnnUd,i5dxUd,sy2x,sy2z,sy30,sy31,sy2d,etBPYb,i5H9N,SU9Rsf,sy32,sy33,sy34,sy2b,sy2e,PHUIyb,qNG0Fc,sys,syt,syx,qTnoBf,NJ1rfe,ywOR5c,sy36,sye,wg1P6b,EcW08c,sy3e,sy3f,t8tqF,qddgKe,sy67,SM1lmd,eEDsnd,sy2c,sy3k,sy2f,sy23,sy2s,sy3j,sy3l,oDd24c,yUHiM,syz,syq,RRzQxe,sya,sy14,yyxWAc,sy0,sy1,sy7,sy6,sy2a,sy29,sy27,sy2g,sy2h,sy1s,sy43,sy50,syp,sy16,syb,sy4m,sy5s,sy15,fNFZH,sy66,sy3o,sy4s,sy2i,i16Xfc,sy4g,zJMuOc,RrXLpc,sy46,sy48,sy4a,sy4i,sy4j,tCGzVe,Ej8J2c,odWSx,cgRV2c,sy1y,sy3n,sy58,o1L5Wb,X4BaPc,vVEdxc,sy4,sy5,sy4l,RQOkef,HXO1uc,sy24,sy25,sy8,sy13,sy1u,sy1v,sy22,gaMBzf,sy5t,sy26,fVuHhf,sy5x,j1RDQb,syg,sy4o,sy4w,sy4v,sy4q,sy4n,sy4r,sy1r,sy4k,sy4p,Md9ENb	128 KB	93 KB (73%)	✓	3rd
https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.gSqfLc8WnvU.O/m=client/rt=j/sv=1/d=1/ed=1/rs=AHpOoo_cXXGArE2dtw6vkGR2NQ_1f5L3AQ/cb=gapi.loaded_0?le=scs	108 KB	80 KB (75%)	✓	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=1/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=view	169 KB	71 KB (42%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-1MQT649BFR	168 KB	62 KB (37%)	✓	3rd
https://www.gstatic.com/feedback/js/help/prod/service/lazy.min.js	39 KB	31 KB (80%)	✓	3rd
https://apis.google.com/js/client.js?onload=gapiLoaded	6 KB	—	✓	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=sy4e,sy4f,sy4d,FoQBg	14 KB	—	✓	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=sy63,TRvtze	1 KB	—	✓	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=sy1q,eFZtfd,rCcCxc,sy60,gJzDyc,uu7UOe,sy69,uY3Nvd,sy68,soHxf,sy5r,HYv29e	25 KB	—	✓	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=sy41,sy42,sy44,sy47,fuVYe,sy49,sy4b,sy4c,CG0Qwb	16 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

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

Page Weight Inventory

Action

35 resources · 1.4 MB · 337 KB savings available

FIX

35 resources · 1.4 MB · 337 KB savings available

Page weight 1.4 MB exceeds 1 MB target by 442 KB

Got: 1.4 MB Expected: ≤ 1 MB

~337 KB of savings available

32 third-party resources (98% of weight)

35 resources · 1.4 MiB · 32 third-party 441.8 KiB over 1MB target

JavaScript 47% · 684.2 KiB

Image 31% · 461.4 KiB

CSS 13% · 195.4 KiB

Font 6% · 88.3 KiB

Document 2% · 35.6 KiB

Other 0% · 916 B

~337.2 KiB of savings available

Remove unused JavaScript: 337.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

35 resources			1.4 MiB

D

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: no-cache, no-store, max-age=0, must-revalidate

No ETag or Last-Modified header

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

Cache-Control

no-cache, no-store, max-age=0, must-revalidate

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

B

Page Weight Budget

1.4 MB transferred, 35 requests

REVIEW

1.4 MB transferred, 35 requests

Page weighs 4.2 MB (1.4 MB transferred)

JavaScript is 684 KB — consider code splitting or lazy loading

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

Got: 684 KB

35 HTTP requests

Estimated 0.30 g CO2 per page load

1.4 MB transferred

35 requests

0.30 g CO2 per page load

JavaScript 684.2 KiB 47%

Images 458.0 KiB 31%

CSS 195.4 KiB 13%

Fonts 88.3 KiB 6%

HTML 35.6 KiB 2%

Other 3.4 KiB 0%

Other 578 B 0%

Other 338 B 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Under 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

C

Image Optimization

Action

8 images, 0 KB saveable

REVIEW

8 images, 0 KB saveable

https://lh3.googleusercontent.com/sitesv/AA5AbUAlG... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://lh3.googleusercontent.com/sitesv/AA5AbUDAf... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://lh3.googleusercontent.com/sitesv/AA5AbUDTS... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

8 images 458 KB

0 oversized -0 KB

8 legacy format

3 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

C

JS Execution Cost

Action

1823ms total JS execution

REVIEW

1823ms total JS execution

https://www.gstatic.com/_/atari/_/js/k=atari.vw.en...: 437ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-1MQT...: 383ms CPU time

https://www.alinasdogservices.co.uk/: 380ms CPU time

Unattributable: 228ms CPU time

https://www.gstatic.com/_/atari/_/js/k=atari.vw.en...: 185ms CPU time

Third-party scripts: 1444ms (79% of total)

Main Thread Breakdown

Script Evaluation 49% Other 25% Style & Layout 11% Script Parsing & Compilation 9% Parse HTML & CSS 3% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=1/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=view	437ms	189ms	33ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-1MQT649BFR	383ms	341ms	41ms	3rd
https://www.alinasdogservices.co.uk/	380ms	18ms	14ms	1st
Unattributable	228ms	23ms	0ms	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=LLHPdb,sy2w,ws9Tlc,cEt90b,sy74,KUM7Z,MpJwZc,n73qwf,A4UTCb,sy2v,L1AAkb,aW3pY,RyvaUb,sy2r,sy37,owcnme,sy38,sy39,O6y8ed,mzzZzc,CHCSlb,qAKInc,sy3m,YXyON,sy3r,sy3q,iTeaXe,sy65,abQiW,sy12,sy11,sy10,syv,syu,sy3a,pxq3x,sy3b,syo,sy3c,sy3w,syw,sy28,sy3d,sy4t,sy64,EGNJFf,V3dDOb,sy2u,ENNBBf,syh,syf,syd,syn,syc,sy3g,yf2Bs,sy1c,sy1f,sy1b,sy19,sy1j,sy1h,sy1k,sy1m,sy1n,sy1i,sy1e,sy1a,sy1g,sy1o,sy1d,syr,sy35,fmklff,sy45,TGYpv,sy9,syy,sy4h,sy20,sy1z,sy4u,sy5z,gK4msf,XVMNvd,sy71,yxTchf,sy72,sy73,xQtZb,iSvg6e,N5Lqpc,sy3u,sy3v,sy3s,sy3t,sy3p,sy3x,sy3y,pc62j,qEW1W,oNFsLb,syi,syl,sym,sy3h,sy3i,iwfZq,m9oV,sy2y,RAnnUd,i5dxUd,sy2x,sy2z,sy30,sy31,sy2d,etBPYb,i5H9N,SU9Rsf,sy32,sy33,sy34,sy2b,sy2e,PHUIyb,qNG0Fc,sys,syt,syx,qTnoBf,NJ1rfe,ywOR5c,sy36,sye,wg1P6b,EcW08c,sy3e,sy3f,t8tqF,qddgKe,sy67,SM1lmd,eEDsnd,sy2c,sy3k,sy2f,sy23,sy2s,sy3j,sy3l,oDd24c,yUHiM,syz,syq,RRzQxe,sya,sy14,yyxWAc,sy0,sy1,sy7,sy6,sy2a,sy29,sy27,sy2g,sy2h,sy1s,sy43,sy50,syp,sy16,syb,sy4m,sy5s,sy15,fNFZH,sy66,sy3o,sy4s,sy2i,i16Xfc,sy4g,zJMuOc,RrXLpc,sy46,sy48,sy4a,sy4i,sy4j,tCGzVe,Ej8J2c,odWSx,cgRV2c,sy1y,sy3n,sy58,o1L5Wb,X4BaPc,vVEdxc,sy4,sy5,sy4l,RQOkef,HXO1uc,sy24,sy25,sy8,sy13,sy1u,sy1v,sy22,gaMBzf,sy5t,sy26,fVuHhf,sy5x,j1RDQb,syg,sy4o,sy4w,sy4v,sy4q,sy4n,sy4r,sy1r,sy4k,sy4p,Md9ENb	185ms	146ms	32ms	3rd
https://apis.google.com/_/scs/abc-static/_/js/k=gapi.lb.en.gSqfLc8WnvU.O/m=client/rt=j/sv=1/d=1/ed=1/rs=AHpOoo_cXXGArE2dtw6vkGR2NQ_1f5L3AQ/cb=gapi.loaded_0?le=scs	84ms	62ms	21ms	3rd
https://www.gstatic.com/_/atari/_/js/k=atari.vw.en_US.sR0b4I27cvg.O/am=CCBwAAg/d=0/rs=AGEqA5nxGdhBpBnU1sbMtXeudyt80nxoZQ/m=sy63,TRvtze	75ms	70ms	0ms	3rd
https://www.gstatic.com/_/atari/_/ss/k=atari.vw.bdHXNY5ICL8.L.W.O/am=CCBwAAg/d=1/rs=AGEqA5nc4YUGyvjKvFKlCsb5hNySwk_NVg	52ms	0ms	0ms	3rd

B

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

HTTP/3 (QUIC) is not advertised

HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.

C

Compression Algorithm

Action

Main response served uncompressed

REVIEW

Main response served uncompressed

Main HTML response has no Content-Encoding (uncompressed)

The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.

B

Server-Timing Observability

No Server-Timing header found

REVIEW

No Server-Timing header found

No Server-Timing header found

Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.

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

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

3 fonts (88 KB)

PASS

3 fonts (88 KB)

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

Web fonts

3

88 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

KFO7CnqEu92Fr1ME7kSn66a... woff2 swap

Size 37 KB

Load time 90 ms

Start 739 ms

Risk FOUT — text flashes from fallback to web font

4UasrENHsxJlGDuGo1OIlJf... woff2 swap

Size 35 KB

Load time 90 ms

Start 740 ms

Risk FOUT — text flashes from fallback to web font

KFO7CnqEu92Fr1ME7kSn66a... woff2 swap

Size 16 KB

Load time 75 ms

Start 742 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

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: no-cache, no-store, max-age=0, must-revalidate

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: Sec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

No `ETag` or `Last-Modified` -- conditional GET not supported

Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.

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

JavaScript Blocking

1 JS blocking issue(s) detected

PASS

1 JS blocking issue(s) detected

2 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

No CSS performance depth issues detected

Network Waterfall

35 requests over 3979ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

79% of JavaScript execution is third-party

First-party Third-party 1444ms · 763KB · £15/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.gstatic.com www.gstatic.com	Other	437ms	169 KB	42%	£5/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	383ms	168 KB	37%	£4/mo	Costly
Unattributable Unattributable	Other	228ms	0 KB	—	£2/mo	Costly
www.gstatic.com www.gstatic.com	Other	185ms	128 KB	73%	£2/mo	Optional
apis.google.com apis.google.com	Other	84ms	108 KB	75%	£1/mo	Optional
www.gstatic.com www.gstatic.com	Other	75ms	1 KB	—	£1/mo	Optional
www.gstatic.com www.gstatic.com	Other	52ms	190 KB	—	£1/mo	Optional

www.gstatic.com

Other

Costly

Execution 437ms

Transfer 169 KB

Unused 42%

Monthly Cost £5/mo

Google Tag Manager

Tag Manager

Costly

Execution 383ms

Transfer 168 KB

Unused 37%

Monthly Cost £4/mo

Unattributable

Other

Costly

Execution 228ms

Transfer 0 KB

Monthly Cost £2/mo

www.gstatic.com

Other

Optional

Execution 185ms

Transfer 128 KB

Unused 73%

Monthly Cost £2/mo

apis.google.com

Other

Optional

Execution 84ms

Transfer 108 KB

Unused 75%

Monthly Cost £1/mo

www.gstatic.com

Other

Optional

Execution 75ms

Transfer 1 KB

Monthly Cost £1/mo

www.gstatic.com

Other

Optional

Execution 52ms

Transfer 190 KB

Monthly Cost £1/mo

These scripts may cost more than they're worth

www.gstatic.com adds 437ms and costs ~£5/month
Google Tag Manager adds 383ms and costs ~£4/month
Unattributable adds 228ms and costs ~£2/month

79% 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

www.gstatic.com takes 437ms 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 383ms 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

Unattributable takes 228ms 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

73% of www.gstatic.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

75% of apis.google.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

Image Optimization

4 images, 191 KB total, 142 KB wasted

INFO

Image Optimization Audit

Total Images

4

Total Size

191 KB

Oversized

3

Wasted

142 KB

2 missing alt text 4 missing dimensions 3 missing lazy loading

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

Send Feedback