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

100

Accessibility

Best Practices

100

SEO

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

3.02 s

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

12.15 s

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

4.19 s

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

0.220

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

4.19 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.

28.48 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

9 PASS 1 REVIEW 5 FIX

Page Weight Budget

Action

5.2 MB transferred, 134 requests

FIX

5.2 MB transferred, 134 requests

Page weighs 12.7 MB (5.2 MB transferred)

JavaScript is 2.6 MB — consider code splitting or lazy loading

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

Got: 2.6 MB

Images are 2.2 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 2.2 MB

Fonts are 204 KB — consider subsetting or using system fonts

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

Got: 204 KB

134 HTTP requests — consider bundling or reducing

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

Estimated 1.1 g CO2 per page load

5.2 MB transferred

134 requests

1.1 g CO2 per page load

JavaScript 2.6 MiB 50%

Images 2.2 MiB 42%

Fonts 204.5 KiB 4%

CSS 135.1 KiB 3%

HTML 55.0 KiB 1%

Other 4.5 KiB 0%

Other 4.0 KiB 0%

Other 3.3 KiB 0%

Other 2.7 KiB 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

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

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (5.2 MiB of 5.2 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

10355ms total JS execution

FIX

10355ms total JS execution

Unattributable: 1229ms CPU time

https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 1103ms CPU time

https://try.abtasty.com/03d869a33f572dd77e62594449...: 1054ms CPU time

https://www.tate.org.uk/: 1050ms CPU time

https://www.googletagmanager.com/gtm.js?id=GTM-WQP...: 918ms CPU time

Third-party scripts: 10355ms (100% of total)

Main Thread Breakdown

Script Evaluation 62% Other 14% Script Parsing & Compilation 10% Style & Layout 8%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	1229ms	139ms	0ms	3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	1103ms	936ms	123ms	3rd
https://try.abtasty.com/03d869a33f572dd77e62594449ebd8cb/main.4f8fe8525f40523c4a4c.js	1054ms	928ms	26ms	3rd
https://www.tate.org.uk/	1050ms	18ms	9ms	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WQPJ9H	918ms	766ms	85ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-Q4CTQC82D1&cx=c&gtm=4e64h1	454ms	348ms	100ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-4GZRWXM2P8&cx=c&gtm=4e64h1	443ms	344ms	54ms	3rd
https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	435ms	227ms	10ms	3rd
https://www.tate.org.uk/static/js/TateUI.c2ca8065327f.js	415ms	255ms	67ms	3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js	348ms	284ms	58ms	3rd

Showing top 10 of 26 scripts

JS Bundles

Action

52 scripts, 1.2 MB unused

FIX

52 scripts, 1.2 MB unused

https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)

Consider code splitting or tree shaking to reduce unused code.

https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)

Consider code splitting or tree shaking to reduce unused code.

https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)

Consider code splitting or tree shaking to reduce unused code.

https://www.tate.org.uk/static/js/TateUI.c2ca80653...: 103 KB unused (75%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-Q4CT...: 65 KB unused (37%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.2 MB

1227 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	0 KB	177 KB (49%)	✓	3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362 KB	177 KB (49%)	✓	3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362 KB	177 KB (49%)	✓	3rd
https://www.tate.org.uk/static/js/TateUI.c2ca8065327f.js	138 KB	103 KB (75%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-Q4CTQC82D1&cx=c&gtm=4e64h1	173 KB	65 KB (37%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-4GZRWXM2P8&cx=c&gtm=4e64h1	155 KB	62 KB (40%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=DC-13274131&cx=c&gtm=4e64h1	129 KB	60 KB (46%)	✓	3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js	106 KB	57 KB (54%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=AW-1012661956&cx=c&gtm=4e64h1	145 KB	56 KB (39%)	✓	3rd
https://sdk.privacy-center.org/sdk/22ecd6bfac93de604efec0b75b2c796ee1675f92/modern/sdk.22ecd6bfac93de604efec0b75b2c796ee1675f92.js	102 KB	56 KB (54%)	✓	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

134 resources · 5.2 MB · 1.2 MB savings available

FIX

134 resources · 5.2 MB · 1.2 MB savings available

Page weight 4.2 MB over 1MB target

Got: 5.2 MB Expected: ≤ 1 MB

~1.2 MB of savings available

133 third-party resources (100% of weight)

8 resources over 200KB

134 resources · 5.2 MiB · 133 third-party 4.2 MiB over 1MB target

JavaScript 50% · 2.6 MiB

Image 42% · 2.2 MiB

Font 4% · 204.5 KiB

CSS 3% · 135.1 KiB

Document 1% · 55.1 KiB

Other 0% · 9.3 KiB

~1.2 MiB of savings available

Remove unused JavaScript: 1.2 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

134 resources			5.2 MiB

Image Optimization

Action

41 images, 0 KB saveable

REVIEW

41 images, 0 KB saveable

https://media.tate.org.uk/aztate-prd-ew-dg-wgtail-... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://www.tate.org.uk/static/images/tate-logo.21... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://media.tate.org.uk/aztate-prd-ew-dg-wgtail-... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

41 images 2.2 MB

0 oversized -0 KB

40 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

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

5 fonts (204 KB)

PASS

5 fonts (204 KB)

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

Web fonts

204 KB total

Render-blocking

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

TateNewPro-Regular.5af4... woff swap

Size 48 KB

Load time 13 ms

Start 282 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

tateicons.02af80ba7e78.... woff swap

Size 14 KB

Load time 6 ms

Start 282 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

TateNewPro-Thin.8b266f1... woff swap

Size 59 KB

Load time 15 ms

Start 283 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

TateNewPro-Bold.fc002b2... woff swap

Size 50 KB

Load time 5 ms

Start 1.6 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

KFO7CnqEu92Fr1ME7kSn66a... woff2 swap

Size 34 KB

Load time 46 ms

Start 1.9 s

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)

Fixing the unchecked items could save ~51 KB and ~102 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

3 hints, 0 missing preconnects

PASS

3 hints, 0 missing preconnects

Page uses 3 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

prefetch

—

3 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: Axis12 Ltd

HTTP Caching

max-age=86400 (1 day)

PASS

max-age=86400 (1 day)

Cache-Control header is set

Got: max-age=86400

Effective TTL: 1 day (max-age=86400)

No ETag or Last-Modified header

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

Cache-Control

max-age=86400

Directive	Value	Meaning
max-age	86400	Cache for 1 day

Effective TTL: 86400 seconds

Network Waterfall

134 requests over 2890ms

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 10355ms · 1797KB · £107/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	1229ms	0 KB	—	£13/mo	Costly
www.gstatic.com www.gstatic.com	Other	1103ms	0 KB	49%	£11/mo	Costly
try.abtasty.com try.abtasty.com	Other	1054ms	67 KB	62%	£11/mo	Costly
www.tate.org.uk www.tate.org.uk	Other	1050ms	15 KB	—	£11/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	918ms	206 KB	26%	£10/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	454ms	173 KB	37%	£5/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	443ms	155 KB	40%	£5/mo	Costly
ajax.googleapis.com ajax.googleapis.com	Other	435ms	30 KB	—	£5/mo	Costly
www.tate.org.uk www.tate.org.uk	Other	415ms	138 KB	75%	£4/mo	Costly
analytics.tiktok.com analytics.tiktok.com	Other	348ms	106 KB	54%	£4/mo	Costly
sdk.privacy-center.org sdk.privacy-center.org	Other	341ms	54 KB	38%	£4/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	329ms	97 KB	33%	£3/mo	Costly
sdk.privacy-center.org sdk.privacy-center.org	Other	308ms	102 KB	54%	£3/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	295ms	16 KB	—	£3/mo	Costly
Hotjar script.hotjar.com	Session Replay	234ms	57 KB	66%	£2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	209ms	145 KB	37%	£2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	208ms	145 KB	39%	£2/mo	Costly
Twitter/X Pixel static.ads-twitter.com	Advertising	187ms	13 KB	—	£2/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	153ms	129 KB	46%	£2/mo	Optional
s.pinimg.com s.pinimg.com	Other	129ms	27 KB	—	£1/mo	Optional
Facebook Pixel connect.facebook.net	Advertising	127ms	46 KB	—	£1/mo	Optional
Facebook Pixel connect.facebook.net	Advertising	94ms	16 KB	—	£1/mo	Optional
tags.srv.stackadapt.com tags.srv.stackadapt.com	Other	92ms	8 KB	—	£1/mo	Optional
analytics.tiktok.com analytics.tiktok.com	Other	74ms	40 KB	—	£1/mo	Optional
static.queue-it.net static.queue-it.net	Other	73ms	7 KB	—	£1/mo	Optional
Hotjar static.hotjar.com	Session Replay	55ms	6 KB	—	£1/mo	Optional

Unattributable

Other

Costly

Execution 1229ms

Transfer 0 KB

Monthly Cost £13/mo

www.gstatic.com

Other

Costly

Execution 1103ms

Transfer 0 KB

Unused 49%

Monthly Cost £11/mo

try.abtasty.com

Other

Costly

Execution 1054ms

Transfer 67 KB

Unused 62%

Monthly Cost £11/mo

www.tate.org.uk

Other

Costly

Execution 1050ms

Transfer 15 KB

Monthly Cost £11/mo

Google Tag Manager

Tag Manager

Costly

Execution 918ms

Transfer 206 KB

Unused 26%

Monthly Cost £10/mo

Google Tag Manager

Tag Manager

Costly

Execution 454ms

Transfer 173 KB

Unused 37%

Monthly Cost £5/mo

Google Tag Manager

Tag Manager

Costly

Execution 443ms

Transfer 155 KB

Unused 40%

Monthly Cost £5/mo

ajax.googleapis.com

Other

Costly

Execution 435ms

Transfer 30 KB

Monthly Cost £5/mo

www.tate.org.uk

Other

Costly

Execution 415ms

Transfer 138 KB

Unused 75%

Monthly Cost £4/mo

analytics.tiktok.com

Other

Costly

Execution 348ms

Transfer 106 KB

Unused 54%

Monthly Cost £4/mo

sdk.privacy-center.org

Other

Costly

Execution 341ms

Transfer 54 KB

Unused 38%

Monthly Cost £4/mo

Facebook Pixel

Advertising

Costly

Execution 329ms

Transfer 97 KB

Unused 33%

Monthly Cost £3/mo

sdk.privacy-center.org

Other

Costly

Execution 308ms

Transfer 102 KB

Unused 54%

Monthly Cost £3/mo

Facebook Pixel

Advertising

Costly

Execution 295ms

Transfer 16 KB

Monthly Cost £3/mo

Hotjar

Session Replay

Costly

Execution 234ms

Transfer 57 KB

Unused 66%

Monthly Cost £2/mo

Google Tag Manager

Tag Manager

Costly

Execution 209ms

Transfer 145 KB

Unused 37%

Monthly Cost £2/mo

Google Tag Manager

Tag Manager

Costly

Execution 208ms

Transfer 145 KB

Unused 39%

Monthly Cost £2/mo

Twitter/X Pixel

Advertising

Optional

Execution 187ms

Transfer 13 KB

Monthly Cost £2/mo

Google Tag Manager

Tag Manager

Optional

Execution 153ms

Transfer 129 KB

Unused 46%

Monthly Cost £2/mo

s.pinimg.com

Other

Optional

Execution 129ms

Transfer 27 KB

Monthly Cost £1/mo

Facebook Pixel

Advertising

Optional

Execution 127ms

Transfer 46 KB

Monthly Cost £1/mo

Facebook Pixel

Advertising

Optional

Execution 94ms

Transfer 16 KB

Monthly Cost £1/mo

tags.srv.stackadapt.com

Other

Optional

Execution 92ms

Transfer 8 KB

Monthly Cost £1/mo

analytics.tiktok.com

Other

Optional

Execution 74ms

Transfer 40 KB

Monthly Cost £1/mo

static.queue-it.net

Other

Optional

Execution 73ms

Transfer 7 KB

Monthly Cost £1/mo

Hotjar

Session Replay

Optional

Execution 55ms

Transfer 6 KB

Monthly Cost £1/mo

These scripts may cost more than they're worth

Unattributable adds 1229ms and costs ~£13/month
www.gstatic.com adds 1103ms and costs ~£11/month
try.abtasty.com adds 1054ms and costs ~£11/month
www.tate.org.uk adds 1050ms and costs ~£11/month
Google Tag Manager adds 918ms and costs ~£10/month
Google Tag Manager adds 454ms and costs ~£5/month
Google Tag Manager adds 443ms and costs ~£5/month
ajax.googleapis.com adds 435ms and costs ~£5/month
www.tate.org.uk adds 415ms and costs ~£4/month
analytics.tiktok.com adds 348ms and costs ~£4/month
sdk.privacy-center.org adds 341ms and costs ~£4/month
Facebook Pixel adds 329ms and costs ~£3/month
sdk.privacy-center.org adds 308ms and costs ~£3/month
Facebook Pixel adds 295ms and costs ~£3/month
Hotjar adds 234ms and costs ~£2/month
Google Tag Manager adds 209ms and costs ~£2/month
Google Tag Manager adds 208ms and costs ~£2/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 1229ms 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.gstatic.com takes 1103ms 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

try.abtasty.com takes 1054ms 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

62% of try.abtasty.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

www.tate.org.uk takes 1050ms 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 918ms 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 454ms 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 443ms 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

ajax.googleapis.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

www.tate.org.uk takes 415ms 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

75% of www.tate.org.uk'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

analytics.tiktok.com takes 348ms 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 analytics.tiktok.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

sdk.privacy-center.org takes 341ms 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 329ms 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

sdk.privacy-center.org takes 308ms 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 sdk.privacy-center.org'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

Facebook Pixel takes 295ms 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

Hotjar takes 234ms 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

66% of Hotjar'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 209ms 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 208ms 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

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.