Performance
· 21 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.
926 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.88 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
34 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.63 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.
5.22 s
Page Load Progression
FPage Weight BudgetAction3.0 MB transferred, 124 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
Subset fonts to include only used characters, or switch to system font stacks.
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.
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 BundlesAction47 scripts, 632 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.itau.com.br/gestao-de-cookies/main.js | 590 KB | 187 KB (32%) | ✓ | 3rd |
| https://plugin.handtalk.me/web/latest/sign.646cf9e8.js | 110 KB | 103 KB (95%) | ✓ | 3rd |
| https://www.itau.com.br/libs/webpack/public/caronte-public.js | 191 KB | 93 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-XX21YFL930&cx=c>m=4e65k1 | 165 KB | 65 KB (39%) | ✓ | 3rd |
| https://plugin.handtalk.me/web/latest/handtalk.min.js | 149 KB | 59 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5NGCP8C | 160 KB | 58 KB (36%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MMDJ68X>m=4e65k1 | 187 KB | 43 KB (23%) | ✓ | 3rd |
| https://www.itau.com.br/sdk-analytics/web.js | 81 KB | 24 KB (30%) | ✓ | 3rd |
| https://www.itau.com.br/components_idl/carousel_dots_idl/ts/carousel_dots_idl.js | 3 KB | — | ✓ | 3rd |
| https://www.itau.com.br/libs/scripts/urlParamFix.js | 1 KB | — | ✓ | 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 InventoryAction124 resources · 3.0 MB · 632 KB savings availableFIX
~632.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 124 resources | 3.0 MiB | ||||||
BImage Optimization22 images, 0 KB saveableREVIEW
CJS Execution CostAction1192ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.itau.com.br/gestao-de-cookies/polyfills.js | 414ms | 329ms | 23ms | 3rd |
| https://www.itau.com.br/ | 344ms | 86ms | 5ms | 3rd |
| Unattributable | 118ms | 4ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-XX21YFL930&cx=c>m=4e65k1 | 103ms | 92ms | 9ms | 3rd |
| https://www.itau.com.br/gestao-de-cookies/main.js | 94ms | 79ms | 10ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MMDJ68X>m=4e65k1 | 64ms | 42ms | 16ms | 3rd |
| https://www.itau.com.br/libs/webpack/public/caronte-public.js | 56ms | 45ms | 11ms | 3rd |
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingmax-age=0REVIEW
max-age=0
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading9 fonts (552 KB)PASS
Web fonts
9
552 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~307 KB and ~614 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+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Network Waterfall124 requests over 1994msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.itau.com.br www.itau.com.br | Other | 414ms | 34 KB | — | R$5/mo | Costly |
www.itau.com.br www.itau.com.br | Other | 344ms | 25 KB | — | R$4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 103ms | 165 KB | 39% | R$1/mo | Optional |
www.itau.com.br www.itau.com.br | Other | 94ms | 590 KB | 32% | R$1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 64ms | 187 KB | 23% | R$1/mo | Optional |
www.itau.com.br www.itau.com.br | Other | 56ms | 191 KB | 49% | R$1/mo | Optional |
These scripts may cost more than they're worth
- www.itau.com.br adds 414ms and costs ~R$5/month
- www.itau.com.br adds 344ms and costs ~R$4/month
90% 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
www.itau.com.br takes 414ms 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
www.itau.com.br takes 344ms 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