Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.74 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.64 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
522 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.041
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.31 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.
8.48 s
Page Load Progression
535 ms 1.1 s
1.6 s
2.1 s
2.7 s
3.2 s 3.7 s
4.3 sFPage Weight BudgetAction6.1 MB transferred, 250 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
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.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4696ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.bb.com.br/wp-content/uploads/assets-dls-ngfifteen/polyfills.min.js | 1407ms | 710ms | 1ms | 3rd |
| https://cdn.appdynamics.com/adrum/adrum-24.4.0.4454.js | 1320ms | 644ms | 7ms | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 | 348ms | 183ms | 1ms | 3rd |
| Unattributable | 301ms | 9ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-WNT15F74XM&cx=c>m=4e65k1 | 240ms | 182ms | 10ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KNCXJQN | 170ms | 101ms | 9ms | 3rd |
| https://connect.facebook.net/signals/config/463733521052382?v=2.9.325&r=stable&domain=www.bb.com.br&hme=af8aa31887db259becaf70277daef60bd8bc35c2df82c2acd4258de27ecac4b5&ex_m=104%2C207%2C155%2C22%2C72%2C73%2C146%2C68%2C67%2C11%2C164%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C160%2C166%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C167%2C172%2C221%2C62%2C188%2C189%2C55%2C279%2C30%2C74%2C233%2C232%2C231%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C156%2C76%2C159%2C157%2C158%2C50%2C60%2C123%2C15%2C163%2C45%2C266%2C267%2C265%2C26%2C27%2C28%2C48%2C147%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C145%2C148%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C150%2C149%2C151%2C142%2C140%2C25%2C35%2C59%2C109%2C162%2C70%2C17%2C153%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C139%2C161%2C34%2C281%2C297%2C214%2C203%2C204%2C202%2C300%2C291%2C52%2C215%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C125%2C58%2C64%2C152%2C115%2C37%2C32%2C53%2C56%2C100%2C165%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C168%2C169%2C94%2C95%2C9%2C102%2C51%2C143%2C87%2C79%2C71%2C117%2C106%2C43%2C144%2C0%2C82%2C137%2C141%2C154%2C38%2C108%2C13%2C170 | 131ms | 99ms | 9ms | 3rd |
| https://www.bb.com.br/site/ | 122ms | 45ms | 9ms | 3rd |
| https://cdn.evgnet.com/beacon/bancodobrasilsa/bb_prod/scripts/evergage.min.js | 98ms | 83ms | 14ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=DC-9918852&cx=c>m=4e65k1 | 98ms | 64ms | 6ms | 3rd |
Showing top 10 of 16 scripts
FJS BundlesAction53 scripts, 1.6 MB unusedFIX
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=577326438421377050&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=264799283338310&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=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=275757974317330&lib=kwaiq | 83 KB | 69 KB (85%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction250 resources · 6.1 MB · 1.6 MB savings availableFIX
~1.6 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 250 resources | 6.1 MiB | ||||||
BImage Optimization66 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
BMain HTML Cache-ControlMain HTML max-age=3600 (~60min)REVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading11 fonts (183 KB)PASS
Web fonts
11
183 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A+HTTP Cachingmax-age=3600 (1 hour)PASS
max-age=3600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 3600 | Cache for 1 hour |
Network Waterfall250 requests over 44589msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.bb.com.br cdn.bb.com.br | Other | 1407ms | 13 KB | — | R$4/mo | Costly |
cdn.appdynamics.com cdn.appdynamics.com | Other | 1320ms | 119 KB | 29% | R$4/mo | Costly |
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 348ms | 0 KB | — | R$1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 240ms | 169 KB | 38% | R$1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 170ms | 159 KB | 45% | R$0/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 131ms | 136 KB | 17% | R$0/mo | Optional |
www.bb.com.br www.bb.com.br | Other | 122ms | 40 KB | — | R$0/mo | Optional |
cdn.evgnet.com cdn.evgnet.com | Other | 98ms | 53 KB | 50% | R$0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 98ms | 131 KB | 46% | R$0/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 93ms | 110 KB | 49% | R$0/mo | Optional |
s1.kwai.net s1.kwai.net | Other | 83ms | 83 KB | 43% | R$0/mo | Optional |
s1.kwai.net s1.kwai.net | Other | 80ms | 5 KB | — | R$0/mo | Optional |
www.bb.com.br www.bb.com.br | Other | 67ms | 5 KB | — | R$0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 66ms | 187 KB | 28% | R$0/mo | Optional |
These scripts may cost more than they're worth
- cdn.bb.com.br adds 1407ms and costs ~R$4/month
- cdn.appdynamics.com adds 1320ms and costs ~R$4/month
- static.cloudflareinsights.com adds 348ms and costs ~R$1/month
- Google Tag Manager adds 240ms and costs ~R$1/month
92% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 1407ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
cdn.appdynamics.com takes 1320ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
static.cloudflareinsights.com takes 348ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 240ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
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 Optimization60 images, 8 KB total, 6 KB wastedINFO
Image Optimization Audit
Total Images
60
Total Size
8 KB
Oversized
8
Wasted
6 KB