Performance

· 27 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

100

SEO

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

6.82 s

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

10.47 s

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

4.22 s

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

0.039

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

8.95 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.

37.06 s

Page Load Progression

708 ms

1.4 s

2.1 s

2.8 s

3.5 s

4.2 s

5.0 s

5.7 s

Checks

13 PASS 5 REVIEW 5 FIX

Page Weight Budget

Action

5.4 MB transferred, 249 requests

FIX

5.4 MB transferred, 249 requests

Page weighs 18.5 MB (5.4 MB transferred)

JavaScript is 2.9 MB — consider code splitting or lazy loading

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

Got: 2.9 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

249 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

5.4 MB transferred

249 requests

1.1 g CO2 per page load

JavaScript 2.9 MiB 53%

Images 2.2 MiB 41%

Fonts 157.4 KiB 3%

CSS 63.1 KiB 1%

HTML 44.3 KiB 1%

Other 29.5 KiB 1%

Other 21.9 KiB 0%

Other 9.5 KiB 0%

Other 6.5 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

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

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 (5.4 MiB of 5.4 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

17011ms total JS execution

FIX

17011ms total JS execution

https://cdn.bb.com.br/wp-content/uploads/assets-dl...: 5965ms CPU time

https://cdn.appdynamics.com/adrum/adrum-24.4.0.445...: 3595ms CPU time

https://static.cloudflareinsights.com/beacon.min.j...: 1168ms CPU time

Unattributable: 1042ms CPU time

https://www.googletagmanager.com/gtm.js?id=GTM-PZ5...: 753ms CPU time

Third-party scripts: 15741ms (93% of total)

Main Thread Breakdown

Script Evaluation 53% Parse HTML & CSS 29% Other 8% Style & Layout 5% Script Parsing & Compilation 3%

Script	Total	Scripting	Parse/Compile	Party
https://cdn.bb.com.br/wp-content/uploads/assets-dls-ngfifteen/polyfills.min.js	5965ms	2884ms	3ms	3rd
https://cdn.appdynamics.com/adrum/adrum-24.4.0.4454.js	3595ms	1896ms	28ms	3rd
https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447	1168ms	584ms	5ms	3rd
Unattributable	1042ms	77ms	0ms	1st
https://www.googletagmanager.com/gtm.js?id=GTM-PZ5NMJG	753ms	439ms	68ms	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KNCXJQN	632ms	359ms	34ms	3rd
https://www.bb.com.br/site/	539ms	159ms	39ms	3rd
https://www.googletagmanager.com/gtag/destination?id=DC-9918852&cx=c&gtm=4e65k1	434ms	326ms	23ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-WNT15F74XM&cx=c&gtm=4e65k1	406ms	337ms	40ms	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/events.js?sdkid=275757974317330&lib=kwaiq	316ms	204ms	1ms	3rd

Showing top 10 of 22 scripts

JS Bundles

Action

53 scripts, 1.6 MB unused

FIX

53 scripts, 1.6 MB unused

https://cdn.bb.com.br/wp-content/uploads/assets-dl...: 250 KB unused (40%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn.bb.com.br/wp-content/uploads/assets-dl...: 250 KB unused (40%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtm.js?id=GTM-KNC...: 71 KB unused (45%)

Consider code splitting or tree shaking to reduce unused code.

https://s1.kwai.net/kos/s101/nlav11187/pixel/core/...: 69 KB unused (85%)

Consider code splitting or tree shaking to reduce unused code.

https://s1.kwai.net/kos/s101/nlav11187/pixel/core/...: 69 KB unused (85%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.6 MB

1626 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://cdn.bb.com.br/wp-content/uploads/assets-dls-ngfifteen/main.min.js	630 KB	250 KB (40%)	✓	3rd
https://cdn.bb.com.br/wp-content/uploads/assets-dls-ngfifteen/main.min.js	0 KB	250 KB (40%)	✓	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KNCXJQN	159 KB	71 KB (45%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=562098332358148128&lib=kwaiq	83 KB	69 KB (85%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=562108413023891471&lib=kwaiq	83 KB	69 KB (85%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=573776901303971844&lib=kwaiq	83 KB	69 KB (85%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=573406026834653258&lib=kwaiq	83 KB	69 KB (85%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=577326438421377050&lib=kwaiq	83 KB	69 KB (85%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=562096975416930340&lib=kwaiq	83 KB	69 KB (85%)	✓	3rd
https://s1.kwai.net/kos/s101/nlav11187/pixel/core/core.js?sdkid=573405644280573998&lib=kwaiq	83 KB	69 KB (85%)	✓	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

249 resources · 5.4 MB · 1.6 MB savings available

FIX

249 resources · 5.4 MB · 1.6 MB savings available

Page weight 5.4 MB exceeds 1 MB target by 4.4 MB

Got: 5.4 MB Expected: ≤ 1 MB

~1.6 MB of savings available

241 third-party resources (100% of weight)

4 resources over 200KB

249 resources · 5.4 MiB · 241 third-party 4.4 MiB over 1MB target

JavaScript 53% · 2.9 MiB

Image 41% · 2.2 MiB

Font 3% · 157.4 KiB

CSS 1% · 63.1 KiB

Other 1% · 59.3 KiB

Document 1% · 46.3 KiB

~1.6 MiB of savings available

Remove unused JavaScript: 1.6 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

249 resources			5.4 MiB

Image Optimization

67 images, 0 KB saveable

REVIEW

67 images, 0 KB saveable

https://cdn.bb.com.br/wp-content/uploads/2022/03/a... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

67 images 2.2 MB

0 oversized -0 KB

59 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

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.

Compression Algorithm

Main response uses gzip; brotli would be ~20% smaller

REVIEW

Main response uses gzip; brotli would be ~20% smaller

Main HTML response uses gzip (brotli would be ~20% smaller)

All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.

Main HTML Cache-Control

Main HTML max-age=3600 (~60min)

REVIEW

Main HTML max-age=3600 (~60min)

Main HTML cached for 60 minutes -- mild staleness risk

Got: max-age=3600

JavaScript Blocking

2 JS blocking issue(s) detected

REVIEW

2 JS blocking issue(s) detected

3 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.

Total JS execution time is 17.0 s -- over the 3.5s budget

Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

9 fonts (157 KB)

PASS

9 fonts (157 KB)

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

Web fonts

157 KB total

Render-blocking

of 9

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

BancoDoBrasilTextos-Reg... woff2 swap

Size 24 KB

Load time 66 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

BancoDoBrasilTitulos-Bo... woff2 swap

Size 24 KB

Load time 70 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

ui.b66db.woff woff swap

Size 12 KB

Load time 75 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

BancoDoBrasilTextos-Bol... woff2 swap

Size 25 KB

Load time 76 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

BancoDoBrasilTitulos-Re... woff2 swap

Size 24 KB

Load time 93 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

icons-portal.woff woff swap

Size 6 KB

Load time 95 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

BancoDoBrasilTextos-Med... woff2 swap

Size 25 KB

Load time 29 ms

Start 3.1 s

Risk FOUT — text flashes from fallback to web font

relacionamento.8f1d2.woff woff swap

Size 5 KB

Load time 28 ms

Start 4.1 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

financeiro.b6b0a.woff woff swap

Size 11 KB

Load time 28 ms

Start 4.1 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

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 ~11 KB and ~22 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

5 hints, 0 missing preconnects

PASS

5 hints, 0 missing preconnects

Page uses 5 resource hint(s)

Current Resource Hints

preconnect

preload

—

dns-prefetch

prefetch

—

5 resource hints configured

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+

Server-Timing Observability

3 Server-Timing entries advertised

PASS

3 Server-Timing entries advertised

Server-Timing header advertises 3 timing entries

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: accept-encoding

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).

`Last-Modified` present -- timestamp-based conditional GET supported

Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.

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

CSS Performance Depth

1 CSS depth issue(s) detected

PASS

1 CSS depth issue(s) detected

7 render-blocking stylesheet(s) -- recommended: <=3

Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.

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

A+

HTTP Caching

max-age=3600 (1 hour)

PASS

max-age=3600 (1 hour)

Cache-Control header is set

Got: max-age=3600

Effective TTL: 1 hour (max-age=3600)

Last-Modified header present

Cache-Control

max-age=3600

Directive	Value	Meaning
max-age	3600	Cache for 1 hour

Effective TTL: 3600 seconds

Network Waterfall

249 requests over 44833ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

93% of JavaScript execution is third-party

First-party Third-party 15741ms · 1409KB · R$47/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
cdn.bb.com.br cdn.bb.com.br	Other	5965ms	13 KB	—	R$18/mo	Costly
cdn.appdynamics.com cdn.appdynamics.com	Other	3595ms	119 KB	29%	R$11/mo	Costly
static.cloudflareinsights.com static.cloudflareinsights.com	Other	1168ms	0 KB	—	R$3/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	753ms	187 KB	28%	R$2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	632ms	159 KB	45%	R$2/mo	Costly
www.bb.com.br www.bb.com.br	Other	539ms	40 KB	—	R$2/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	434ms	131 KB	46%	R$1/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	406ms	169 KB	39%	R$1/mo	Costly
s1.kwai.net s1.kwai.net	Other	316ms	5 KB	—	R$1/mo	Costly
cdn.evgnet.com cdn.evgnet.com	Other	310ms	53 KB	50%	R$1/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	251ms	137 KB	17%	R$1/mo	Costly
analytics.tiktok.com analytics.tiktok.com	Other	243ms	110 KB	51%	R$1/mo	Costly
s1.kwai.net s1.kwai.net	Other	242ms	83 KB	43%	R$1/mo	Costly
www.bb.com.br www.bb.com.br	Other	211ms	5 KB	—	R$1/mo	Costly
Twitter/X Pixel static.ads-twitter.com	Advertising	208ms	13 KB	—	R$1/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	140ms	98 KB	38%	R$0/mo	Optional
www.bb.com.br www.bb.com.br	Other	128ms	1 KB	—	R$0/mo	Optional
cdn.bb.com.br cdn.bb.com.br	Other	88ms	0 KB	40%	R$0/mo	Optional
Google Analytics www.google-analytics.com	Analytics	57ms	21 KB	—	R$0/mo	Optional
eni.bb.com.br eni.bb.com.br	Other	55ms	66 KB	65%	R$0/mo	Optional

cdn.bb.com.br

Other

Costly

Execution 5965ms

Transfer 13 KB

Monthly Cost R$18/mo

cdn.appdynamics.com

Other

Costly

Execution 3595ms

Transfer 119 KB

Unused 29%

Monthly Cost R$11/mo

static.cloudflareinsights.com

Other

Costly

Execution 1168ms

Transfer 0 KB

Monthly Cost R$3/mo

Google Tag Manager

Tag Manager

Costly

Execution 753ms

Transfer 187 KB

Unused 28%

Monthly Cost R$2/mo

Google Tag Manager

Tag Manager

Costly

Execution 632ms

Transfer 159 KB

Unused 45%

Monthly Cost R$2/mo

www.bb.com.br

Other

Costly

Execution 539ms

Transfer 40 KB

Monthly Cost R$2/mo

Google Tag Manager

Tag Manager

Costly

Execution 434ms

Transfer 131 KB

Unused 46%

Monthly Cost R$1/mo

Google Tag Manager

Tag Manager

Costly

Execution 406ms

Transfer 169 KB

Unused 39%

Monthly Cost R$1/mo

s1.kwai.net

Other

Costly

Execution 316ms

Transfer 5 KB

Monthly Cost R$1/mo

cdn.evgnet.com

Other

Costly

Execution 310ms

Transfer 53 KB

Unused 50%

Monthly Cost R$1/mo

Facebook Pixel

Advertising

Costly

Execution 251ms

Transfer 137 KB

Unused 17%

Monthly Cost R$1/mo

analytics.tiktok.com

Other

Costly

Execution 243ms

Transfer 110 KB

Unused 51%

Monthly Cost R$1/mo

s1.kwai.net

Other

Costly

Execution 242ms

Transfer 83 KB

Unused 43%

Monthly Cost R$1/mo

www.bb.com.br

Other

Costly

Execution 211ms

Transfer 5 KB

Monthly Cost R$1/mo

Twitter/X Pixel

Advertising

Costly

Execution 208ms

Transfer 13 KB

Monthly Cost R$1/mo

Facebook Pixel

Advertising

Optional

Execution 140ms

Transfer 98 KB

Unused 38%

Monthly Cost R$0/mo

www.bb.com.br

Other

Optional

Execution 128ms

Transfer 1 KB

Monthly Cost R$0/mo

cdn.bb.com.br

Other

Optional

Execution 88ms

Transfer 0 KB

Unused 40%

Monthly Cost R$0/mo

Google Analytics

Analytics

Optional

Execution 57ms

Transfer 21 KB

Monthly Cost R$0/mo

eni.bb.com.br

Other

Optional

Execution 55ms

Transfer 66 KB

Unused 65%

Monthly Cost R$0/mo

These scripts may cost more than they're worth

cdn.bb.com.br adds 5965ms and costs ~R$18/month
cdn.appdynamics.com adds 3595ms and costs ~R$11/month
static.cloudflareinsights.com adds 1168ms and costs ~R$3/month
Google Tag Manager adds 753ms and costs ~R$2/month
Google Tag Manager adds 632ms and costs ~R$2/month
www.bb.com.br adds 539ms and costs ~R$2/month
Google Tag Manager adds 434ms and costs ~R$1/month
Google Tag Manager adds 406ms and costs ~R$1/month
s1.kwai.net adds 316ms and costs ~R$1/month
cdn.evgnet.com adds 310ms and costs ~R$1/month
Facebook Pixel adds 251ms and costs ~R$1/month
analytics.tiktok.com adds 243ms and costs ~R$1/month
s1.kwai.net adds 242ms and costs ~R$1/month
www.bb.com.br adds 211ms and costs ~R$1/month
Twitter/X Pixel adds 208ms and costs ~R$1/month

93% 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

cdn.bb.com.br takes 5965ms 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.appdynamics.com takes 3595ms 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

static.cloudflareinsights.com takes 1168ms 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 753ms 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 632ms 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.bb.com.br takes 539ms 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 434ms 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 406ms 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

s1.kwai.net takes 316ms 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.evgnet.com takes 310ms 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

50% of cdn.evgnet.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

Facebook Pixel takes 251ms 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

analytics.tiktok.com takes 243ms 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

51% 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

s1.kwai.net takes 242ms 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.bb.com.br takes 211ms 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

Twitter/X Pixel 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

65% of eni.bb.com.br'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

Real-User Performance (CrUX)

Field metrics from the Chrome User Experience Report

INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-04-26 — 2026-05-23)

LCP (p75)

2171 ms

79% good

INP (p75)

288 ms

76% good

CLS (p75)

0.000

100% good

FCP (p75)

2246 ms

TTFB (p75)

250 ms

Image Optimization

60 images, 8 KB total, 6 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

8 KB

Oversized

Wasted

6 KB

4 missing alt text 56 missing dimensions 51 missing lazy loading

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