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Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
4
REVIEW
7
PASS
8
INFO
2

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

Mobile Desktop
81
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

508 ms
1.0 s
1.5 s
2.0 s
2.5 s
3.0 s
3.6 s
4.1 s
Checks
21
8 PASS 7 REVIEW 4 FIX
F
Page Weight Budget
Action
3.0 MB transferred, 124 requests
FIX
3.0 MB transferred, 124 requests
Warning::
Page weighs 7.3 MB (3.0 MB transferred)
Warning::
JavaScript is 1.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.9 MB
Info::
Fonts are 552 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 552 KB
Warning::
124 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.62 g CO2 per page load
3.0 MB / 2.4 MB budget
3.0 MB transferred
124 requests
0.62 g CO2 per page load
JavaScript 1.9 MiB 64%
Fonts 552.5 KiB 18%
Other 214.0 KiB 7%
Images 194.3 KiB 6%
CSS 90.7 KiB 3%
HTML 25.0 KiB 1%
Other 8.4 KiB 0%
Other 2.8 KiB 0%
Other 546 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

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

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (3.0 MiB of 3.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
47 scripts, 632 KB unused
FIX
47 scripts, 632 KB unused
Warning::
https://www.itau.com.br/gestao-de-cookies/main.js: 187 KB unused (32%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://plugin.handtalk.me/web/latest/sign.646cf9e...: 103 KB unused (95%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.itau.com.br/libs/webpack/public/caront...: 93 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-XX21...: 65 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://plugin.handtalk.me/web/latest/handtalk.min...: 59 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 632 KB
632 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.itau.com.br/gestao-de-cookies/main.js590 KB187 KB (32%)✓3rd
https://plugin.handtalk.me/web/latest/sign.646cf9e8.js110 KB103 KB (95%)✓3rd
https://www.itau.com.br/libs/webpack/public/caronte-public.js191 KB93 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-XX21YFL930&cx=c&gtm=4e65k1165 KB65 KB (39%)✓3rd
https://plugin.handtalk.me/web/latest/handtalk.min.js149 KB59 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5NGCP8C160 KB58 KB (36%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MMDJ68X&gtm=4e65k1187 KB43 KB (23%)✓3rd
https://www.itau.com.br/sdk-analytics/web.js81 KB24 KB (30%)✓3rd
https://www.itau.com.br/components_idl/carousel_dots_idl/ts/carousel_dots_idl.js3 KB—✓3rd
https://www.itau.com.br/libs/scripts/urlParamFix.js1 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

F
Page Weight Inventory
Action
124 resources · 3.0 MB · 632 KB savings available
FIX
124 resources · 3.0 MB · 632 KB savings available
Warning::
Page weight 3.0 MB exceeds 1 MB target by 2.0 MB
Got: 3.0 MB Expected: ≤ 1 MB
Info::
~632 KB of savings available
Warning::
123 third-party resources (100% of weight)
Info::
2 resources over 200KB
124 resources · 3.0 MiB · 123 third-party 2.0 MiB over 1MB target
JavaScript 71% · 2.1 MiB
Font 18% · 552.5 KiB
Image 7% · 201.8 KiB
CSS 3% · 90.7 KiB
Document 1% · 28.7 KiB
Other 0% · 8.5 KiB

~632.5 KiB of savings available

Remove unused JavaScript: 632.5 KiB
B
Image Optimization
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Info::
All images are well-optimized
22 images 194 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1192ms total JS execution
REVIEW
1192ms total JS execution
Warning::
https://www.itau.com.br/gestao-de-cookies/polyfill...: 414ms CPU time
Warning::
https://www.itau.com.br/: 344ms CPU time
Info::
Unattributable: 118ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-XX21...: 103ms CPU time
Info::
https://www.itau.com.br/gestao-de-cookies/main.js: 94ms CPU time
Warning::
Third-party scripts: 1074ms (90% of total)

Main Thread Breakdown

Script Evaluation 58% Other 15% Style & Layout 9% Script Parsing & Compilation 8% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.itau.com.br/gestao-de-cookies/polyfills.js414ms329ms23ms3rd
https://www.itau.com.br/344ms86ms5ms3rd
Unattributable118ms4ms0ms1st
https://www.googletagmanager.com/gtag/js?id=G-XX21YFL930&cx=c&gtm=4e65k1103ms92ms9ms3rd
https://www.itau.com.br/gestao-de-cookies/main.js94ms79ms10ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MMDJ68X&gtm=4e65k164ms42ms16ms3rd
https://www.itau.com.br/libs/webpack/public/caronte-public.js56ms45ms11ms3rd
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
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
Info::
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
Info::
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

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
9 fonts (552 KB)
PASS
9 fonts (552 KB)
Info::
9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

9

552 KB total

Render-blocking

0

of 9

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 926 ms LCP 2.9 shttps://www.itau.com.br/assets/fonts/ItauTextPro_Bd.woff2ItauTextPro_Bd.woff2 https://www.itau.com.br/assets/fonts/ItauTextPro_Bd.woff2 — 18.2 KiB — 27 ms — font-display: swaphttps://www.itau.com.br/assets/fonts/ItauTextPro_Rg.woff2ItauTextPro_Rg.woff2 https://www.itau.com.br/assets/fonts/ItauTextPro_Rg.woff2 — 18.0 KiB — 29 ms — font-display: swaphttps://www.itau.com.br/assets/fonts/Ids_Itau_Icons.woffIds_Itau_Icons.woff https://www.itau.com.br/assets/fonts/Ids_Itau_Icons.woff — 308.1 KiB — 37 ms — font-display: swaphttps://www.itau.com.br/assets/fonts/ItauDisplayPro_Bd.woff2ItauDisplayPro_Bd.woff2 https://www.itau.com.br/assets/fonts/ItauDisplayPro_Bd.woff2 — 18.0 KiB — 34 ms — font-display: swaphttps://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/ItauTextPro_Bd.woff2ItauTextPro_Bd.woff2 https://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/ItauTextPro_Bd.woff2 — 18.2 KiB — 64 ms — font-display: swaphttps://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/Ids_Itau_Icons.woff2Ids_Itau_Icons.woff2 https://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/Ids_Itau_Icons.woff2 — 122.1 KiB — 76 ms — font-display: swaphttps://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/ItauTextPro_Rg.woff2ItauTextPro_Rg.woff2 https://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/ItauTextPro_Rg.woff2 — 18.0 KiB — 63 ms — font-display: swaphttps://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/ItauDisplayPro_Bd.woff2ItauDisplayPro_Bd.woff2 https://ids.cloud.itau.com.br/cdn/tokens/v1.28.0/web/assets/fonts/ItauDisplayPro_Bd.woff2 — 18.0 KiB — 60 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2S6u9w4BMUTPHh6UVSwiPGQ3... https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2 — 13.9 KiB — 37 ms — font-display: swap
ItauTextPro_Bd.woff2 woff2 swap
Size 18 KB
Load time 27 ms
Start 387 ms
Risk FOUT — text flashes from fallback to web font
ItauTextPro_Rg.woff2 woff2 swap
Size 18 KB
Load time 29 ms
Start 387 ms
Risk FOUT — text flashes from fallback to web font
Ids_Itau_Icons.woff woff swap
Size 308 KB
Load time 37 ms
Start 388 ms
Risk FOUT — text flashes from fallback to web font
  • 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
ItauDisplayPro_Bd.woff2 woff2 swap
Size 18 KB
Load time 34 ms
Start 388 ms
Risk FOUT — text flashes from fallback to web font
ItauTextPro_Bd.woff2 woff2 swap
Size 18 KB
Load time 64 ms
Start 749 ms
Risk FOUT — text flashes from fallback to web font
Ids_Itau_Icons.woff2 woff2 swap
Size 122 KB
Load time 76 ms
Start 750 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
ItauTextPro_Rg.woff2 woff2 swap
Size 18 KB
Load time 63 ms
Start 750 ms
Risk FOUT — text flashes from fallback to web font
ItauDisplayPro_Bd.woff2 woff2 swap
Size 18 KB
Load time 60 ms
Start 751 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ3... woff2 swap
Size 14 KB
Load time 37 ms
Start 1.3 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 ~307 KB and ~614 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: max-age=0
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Origin
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).
Info::
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.
Network Waterfall
124 requests over 1994ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 926 ms LCP 2.9 shttps://itau.com.br// https://itau.com.br/ — 301 — 242 B — 108 ms — h2https://www.itau.com.br/www.itau.com.br/ https://www.itau.com.br/ — 200 — 25.0 KiB — 62 ms — h2https://www.itau.com.br/libs/styles-idl/main.csswww.itau.com.br/libs/styles-idl/mai... https://www.itau.com.br/libs/styles-idl/main.css — 200 — 26.4 KiB — 33 ms — h2https://cdn.cookielaw.org/consent/018f6305-fe79-76f2-ab8e-89ca7ca6fa80/OtAutoBlock.jscdn.cookielaw.org/consent/018f6305-... https://cdn.cookielaw.org/consent/018f6305-fe79-76f2-ab8e-89ca7ca6fa80/OtAutoBlock.js — -1 — 0 B — 101 ms — https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 103 ms — https://www.itau.com.br/tokens_idl/varejo.csswww.itau.com.br/tokens_idl/varejo.c... https://www.itau.com.br/tokens_idl/varejo.css — 200 — 3.3 KiB — 58 ms — h2https://sdk-analytics-web.cloud.itau.com.br/index.jssdk-analytics-web.cloud.itau.com.br... https://sdk-analytics-web.cloud.itau.com.br/index.js — 200 — 7.8 KiB — 52 ms — h3https://bucketfileshiio-prd.cloud.itau.com.br/itau-sdk-interaction-studio/assets/sdk-interaction-studio-web-universal.min.jsbucketfileshiio-prd.cloud.itau.com.... https://bucketfileshiio-prd.cloud.itau.com.br/itau-sdk-interaction-studio/assets/sdk-interaction-studio-web-universal.min.js — 200 — 15.9 KiB — 91 ms — h2https://www.itau.com.br/modules_idl/header_idl/header_idl.csswww.itau.com.br/modules_idl/header_... https://www.itau.com.br/modules_idl/header_idl/header_idl.css — 200 — 6.2 KiB — 54 ms — h2https://www.itau.com.br/modules_idl/header_idl/ts/header_idl.jswww.itau.com.br/modules_idl/header_... https://www.itau.com.br/modules_idl/header_idl/ts/header_idl.js — 200 — 5.3 KiB — 55 ms — h2https://www.itau.com.br/media/dam/m/59ca6000bfbf59d6/original/ITAU_LOGO_HEX_48X48.pngwww.itau.com.br/media/dam/m/59ca600... https://www.itau.com.br/media/dam/m/59ca6000bfbf59d6/original/ITAU_LOGO_HEX_48X48.png — 200 — 5.4 KiB — 78 ms — h2https://www.itau.com.br/modules_idl/header_idl/ts/login_more_access_idl.jswww.itau.com.br/modules_idl/header_... https://www.itau.com.br/modules_idl/header_idl/ts/login_more_access_idl.js — 200 — 4.8 KiB — 55 ms — h2https://www.itau.com.br/libs/scripts-idl/ts/form-mask.jswww.itau.com.br/libs/scripts-idl/ts... https://www.itau.com.br/libs/scripts-idl/ts/form-mask.js — 200 — 1.9 KiB — 56 ms — h2https://www.itau.com.br/components_idl/form_field_idl/ts/form_field_idl.jswww.itau.com.br/components_idl/form... https://www.itau.com.br/components_idl/form_field_idl/ts/form_field_idl.js — 200 — 1.2 KiB — 56 ms — h2https://www.itau.com.br/components_idl/ids_modal_idl/ts/ids_modal_idl.jswww.itau.com.br/components_idl/ids_... https://www.itau.com.br/components_idl/ids_modal_idl/ts/ids_modal_idl.js — 200 — 2.2 KiB — 56 ms — h2https://www.itau.com.br/gestao-de-cookies/polyfills.jswww.itau.com.br/gestao-de-cookies/p... https://www.itau.com.br/gestao-de-cookies/polyfills.js — 200 — 33.9 KiB — 86 ms — h2https://www.itau.com.br/modules_idl/main_banner_rotating_idl/ts/main_banner_rotating_idl.jswww.itau.com.br/modules_idl/main_ba... https://www.itau.com.br/modules_idl/main_banner_rotating_idl/ts/main_banner_rotating_idl.js — 200 — 3.8 KiB — 56 ms — h2https://www.itau.com.br/components_idl/carousel_dots_idl/ts/carousel_dots_idl.jswww.itau.com.br/components_idl/caro... https://www.itau.com.br/components_idl/carousel_dots_idl/ts/carousel_dots_idl.js — 200 — 3.1 KiB — 57 ms — h2https://www.itau.com.br/modules_idl/carrossel_idl/ts/carrossel_idl.jswww.itau.com.br/modules_idl/carross... https://www.itau.com.br/modules_idl/carrossel_idl/ts/carrossel_idl.js — 200 — 3.9 KiB — 61 ms — h2https://www.itau.com.br/modules_idl/richtext_idl/ts/richtext_idl.jswww.itau.com.br/modules_idl/richtex... https://www.itau.com.br/modules_idl/richtext_idl/ts/richtext_idl.js — 200 — 942 B — 62 ms — h2https://www.itau.com.br/modules_idl/search_agency_idl/ts/search_agency_idl.jswww.itau.com.br/modules_idl/search_... https://www.itau.com.br/modules_idl/search_agency_idl/ts/search_agency_idl.js — 200 — 1.2 KiB — 63 ms — h2https://www.itau.com.br/components_idl/search_idl/ts/search_idl.jswww.itau.com.br/components_idl/sear... https://www.itau.com.br/components_idl/search_idl/ts/search_idl.js — 200 — 1.2 KiB — 64 ms — h2https://www.itau.com.br/modules_idl/call_to_action_idl/ts/call_to_action_idl.jswww.itau.com.br/modules_idl/call_to... https://www.itau.com.br/modules_idl/call_to_action_idl/ts/call_to_action_idl.js — 200 — 1.1 KiB — 65 ms — h2https://www.itau.com.br/modules_idl/button_help_whatsapp_idl/ts/button_help_whatsapp_idl.jswww.itau.com.br/modules_idl/button_... https://www.itau.com.br/modules_idl/button_help_whatsapp_idl/ts/button_help_whatsapp_idl.js — 200 — 1.4 KiB — 66 ms — 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h2https://region1.google-analytics.com/g/collect?v=2&tid=G-XX21YFL930&gtm=45je65k1v9122737903z89112447680za20gzb9112447680zd9112447680&_p=1779672295691&gcs=G100&gcd=13p3p3p2l5l1&npa=1&dma_cps=-&dma=1&gdid=dYWJhMj&_eu=AAAAAGA&are=1&cid=1255309767.1779672296&frm=0&pscdl=denied&rcb=12&sr=800x600&uaa=x86&uab=64&uafvl=Not%252FA)Brand%3B99.0.0.0%7CChromium%3B148.0.7778.178&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938469~118689381~119168154&dt=%2Fhome&sid=1779672295&sct=1&seg=0&dl=https%3A%2F%2Fwww.itau.com.br%2F&en=screen_view&_fv=1&_nsi=1&_ss=2&ep.custom_path=%2Fhome&ep.gtm_id=GTM-5NGCP8C&ep.gtm_version=84&ep.implementation_team=canal-itau-nao-logado&ep.environment=nao-logado&ep.business=pf&ep.business_channel=institucional&ep.flow=pf%3Avarejo&ep.sdk_analytics_web_version=0.13.0&ep.previous_screen_name=entrance&ep.screen_name=%2Fhome&tfd=1835region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-XX21YFL930&gtm=45je65k1v9122737903z89112447680za20gzb9112447680zd9112447680&_p=1779672295691&gcs=G100&gcd=13p3p3p2l5l1&npa=1&dma_cps=-&dma=1&gdid=dYWJhMj&_eu=AAAAAGA&are=1&cid=1255309767.1779672296&frm=0&pscdl=denied&rcb=12&sr=800x600&uaa=x86&uab=64&uafvl=Not%252FA)Brand%3B99.0.0.0%7CChromium%3B148.0.7778.178&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938469~118689381~119168154&dt=%2Fhome&sid=1779672295&sct=1&seg=0&dl=https%3A%2F%2Fwww.itau.com.br%2F&en=screen_view&_fv=1&_nsi=1&_ss=2&ep.custom_path=%2Fhome&ep.gtm_id=GTM-5NGCP8C&ep.gtm_version=84&ep.implementation_team=canal-itau-nao-logado&ep.environment=nao-logado&ep.business=pf&ep.business_channel=institucional&ep.flow=pf%3Avarejo&ep.sdk_analytics_web_version=0.13.0&ep.previous_screen_name=entrance&ep.screen_name=%2Fhome&tfd=1835 — 204 — 549 B — 64 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=7&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.itau.com.br%2F&scrsrc=www.googletagmanager.com&rnd=1395639123.1779672296&navt=n&npa=1&ep.ads_data_redaction=0&gdid=dYWJhMj&gtm=45He65k1v9116575127za20gzb9112447680zd9112447680xea&gcs=G100&gcd=13p3p3p2l5l1&dma_cps=-&dma=1&tag_exp=0~115616986~115938466~115938468~118694324&apve=1&apvf=f&apvc=0&tft=1779672296521&tfd=1869pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=7&frm=0&ae=g&en=page_view&dl=https%3A%2F%2Fwww.itau.com.br%2F&scrsrc=www.googletagmanager.com&rnd=1395639123.1779672296&navt=n&npa=1&ep.ads_data_redaction=0&gdid=dYWJhMj&gtm=45He65k1v9116575127za20gzb9112447680zd9112447680xea&gcs=G100&gcd=13p3p3p2l5l1&dma_cps=-&dma=1&tag_exp=0~115616986~115938466~115938468~118694324&apve=1&apvf=f&apvc=0&tft=1779672296521&tfd=1869 — 200 — 21 B — 125 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
90% of JavaScript execution is third-party
First-party Third-party 1074ms · 1192KB · R$13/mo
www.itau.com.br
Other
Costly
Execution 414ms
Transfer 34 KB
Monthly Cost R$5/mo
www.itau.com.br
Other
Costly
Execution 344ms
Transfer 25 KB
Monthly Cost R$4/mo
Google Tag Manager
Tag Manager
Optional
Execution 103ms
Transfer 165 KB
Unused 39%
Monthly Cost R$1/mo
www.itau.com.br
Other
Optional
Execution 94ms
Transfer 590 KB
Unused 32%
Monthly Cost R$1/mo
Google Tag Manager
Tag Manager
Optional
Execution 64ms
Transfer 187 KB
Unused 23%
Monthly Cost R$1/mo
www.itau.com.br
Other
Optional
Execution 56ms
Transfer 191 KB
Unused 49%
Monthly Cost R$1/mo

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.

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.itau.com.br takes 414ms 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.itau.com.br takes 344ms 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.

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