Performance
· 15 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.
3.72 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.88 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.153
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.62 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.
5.88 s
Page Load Progression
1.3 s 2.6 s
3.9 s
5.1 s 6.4 s 7.7 s 9.0 s
10.3 sFPage Weight BudgetAction5.4 MB transferred, 151 requestsFIX
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
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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
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 BundlesAction44 scripts, 875 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 157 KB (43%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 157 KB (43%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 157 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-3674368-4&cx=c>m=4e64h1 | 125 KB | 92 KB (74%) | ✓ | 3rd |
| https://www5.usp.br/wp-content/plugins/3d-flipbook-dflip-lite/assets/js/dflip.min.js?x34176&ver=2.4.20 | 92 KB | 76 KB (83%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-3674368-4 | 125 KB | 65 KB (52%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=GT-WF6J7NL | 147 KB | 61 KB (42%) | ✓ | 3rd |
| https://www5.usp.br/wp-content/plugins/sassy-social-share/public/js/sassy-social-share-public.js?x34176&ver=3.3.70 | 62 KB | 58 KB (95%) | ✓ | 3rd |
| https://connect.facebook.net/pt_BR/bundle/sdk.js/ | 78 KB | 52 KB (66%) | ✓ | 3rd |
| https://www5.usp.br/wp-content/plugins/megamenu/js/maxmegamenu.js?x34176&ver=3.4.1 | 10 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 InventoryAction151 resources · 5.4 MB · 875 KB savings availableFIX
~874.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 151 resources | 5.4 MiB | ||||||
BImage Optimization49 images, 0 KB saveableREVIEW
CJS Execution CostAction1078ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www5.usp.br/ | 400ms | 8ms | 2ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 285ms | 250ms | 25ms | 3rd |
| Unattributable | 172ms | 2ms | 0ms | 3rd |
| https://www5.usp.br/wp-includes/js/jquery/jquery.min.js?x34176&ver=3.6.3 | 156ms | 131ms | 2ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=GT-WF6J7NL | 64ms | 50ms | 12ms | 3rd |
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingno-cacheREVIEW
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (374 KB)PASS
Web fonts
8
374 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~9 KB and ~18 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall151 requests over 10412msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www5.usp.br www5.usp.br | Other | 400ms | 40 KB | — | R$5/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 285ms | 0 KB | 43% | R$4/mo | Costly |
Unattributable Unattributable | Other | 172ms | 0 KB | — | R$2/mo | Optional |
www5.usp.br www5.usp.br | Other | 156ms | 44 KB | — | R$2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 64ms | 147 KB | 42% | R$1/mo | Optional |
These scripts may cost more than they're worth
- www5.usp.br adds 400ms and costs ~R$5/month
- www.gstatic.com adds 285ms and costs ~R$4/month
100% 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
www5.usp.br takes 400ms 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.gstatic.com takes 285ms 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