Performance
· 17 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.
4.96 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.46 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.57 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.226
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.31 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.
26.15 s
Page Load Progression
FPage Weight BudgetAction3.4 MB transferred, 94 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction8163ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://assets.nflxext.com/web/ffe/wp/ui/landingPages/nmhp/nmhpFrameworkClient.fcc229dc9c54f05b4357.js | 2946ms | 2204ms | 486ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 2111ms | 1604ms | 454ms | 3rd |
| https://www.netflix.com/br-en/ | 1812ms | 24ms | 64ms | 3rd |
| Unattributable | 832ms | 96ms | 0ms | 3rd |
| https://help.nflxext.com/helpcenter/OneTrust/oneTrust_production_2026-03-26/scripttemplates/202602.1.0/otBannerSdk.js | 395ms | 231ms | 87ms | 3rd |
| https://help.nflxext.com/helpcenter/OneTrust/oneTrust_production_2026-03-26/scripttemplates/otSDKStub.js | 66ms | 54ms | 4ms | 3rd |
FJS BundlesAction21 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://assets.nflxext.com/web/ffe/wp/ui/landingPages/nmhp/nmhpFrameworkClient.fcc229dc9c54f05b4357.js | 708 KB | 223 KB (31%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://help.nflxext.com/helpcenter/OneTrust/oneTrust_production_2026-03-26/scripttemplates/202602.1.0/otBannerSdk.js | 129 KB | 69 KB (53%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 96 KB | — | ✓ | 3rd |
| https://googleads.g.doubleclick.net/pagead/viewthroughconversion/17080120652/?random=1776358600173&cv=11&fst=1776358600173&bg=ffffff&guid=ON&async=1&en=gtag.config>m=45be64f0h1v876272219za200zd876272219xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115938465~115938468~117266401~117384406&u_w=800&u_h=600&url=https%3A%2F%2Fae.nflximg.net%2Fmonet%2Fscripts%2Fnetflix_tag_05.html%3Fdata%3D%257B%2522membership_status%2522%253A%2522ANONYMOUS%2522%252C%2522country%2522%253A%2522BR%2522%252C%2522region_code%2522%253A%2522SP%2522%252C%2522is_member%2522%253A%2522ANONYMOUS%2522%252C%2522wasFormerMember%2522%253Afalse%252C%2522referrer%2522%253A%2522nmLanding%2522%252C%2522deniedConsentCookieGroups%2522%253A%2522C0005%2522%257D&ref=https%3A%2F%2Fae.nflximg.net%2Fmonet%2Fscripts%2Fadtech_iframe_target_05.html%3Fdata%3D%257B%2522membership_status%2522%253A%2522ANONYMOUS%2522%252C%2522country%2522%253A%2522BR%2522%252C%2522region_code%2522%253A%2522SP%2522%252C%2522is_member%2522%253A%2522ANONYMOUS%2522%252C%2522wasFormerMember%2522%253Afalse%252C%2522referrer%2522%253A%2522nmLanding%2522%252C%2522deniedConsentCookieGroups%2522%253A%2522C0005%2522%257D&top=https%3A%2F%2Fwww.netflix.com%2F&rcb=6&frm=2&hn=www.googleadservices.com&npa=0&pscdl=noapi&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=Linux&uapv=&uaw=0&_tu=QA&data=event%3Dgtag.config&rfmt=3&fmt=4 | 2 KB | — | ✓ | 3rd |
| https://connect.facebook.net/signals/config/829253787145710?v=2.9.298&r=stable&domain=ae.nflximg.net&hme=c048e760b3fdc0fbdc117d7607b2c36e13eff2660c515ac72e86dac5ba060bb9&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C277%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C264%2C265%2C263%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C279%2C294%2C212%2C201%2C202%2C200%2C297%2C289%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168 | 51 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 InventoryAction94 resources · 3.4 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 94 resources | 3.4 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-cache, no-store
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
BImage Optimization19 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (634 KB)PASS
Web fonts
6
634 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~220 KB and ~440 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall94 requests over 3870msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
assets.nflxext.com assets.nflxext.com | Other | 2946ms | 708 KB | 31% | $39/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 2111ms | 0 KB | 49% | $28/mo | Costly |
www.netflix.com www.netflix.com | Other | 1812ms | 81 KB | — | $24/mo | Costly |
Unattributable Unattributable | Other | 832ms | 0 KB | — | $11/mo | Costly |
help.nflxext.com help.nflxext.com | Other | 395ms | 129 KB | 53% | $5/mo | Costly |
help.nflxext.com help.nflxext.com | Other | 66ms | 9 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- assets.nflxext.com adds 2946ms and costs ~$39/month
- www.gstatic.com adds 2111ms and costs ~$28/month
- www.netflix.com adds 1812ms and costs ~$24/month
- Unattributable adds 832ms and costs ~$11/month
- help.nflxext.com adds 395ms and costs ~$5/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
assets.nflxext.com takes 2946ms 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 2111ms 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.netflix.com takes 1812ms 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
Unattributable takes 832ms 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
help.nflxext.com takes 395ms 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
53% of help.nflxext.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