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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
29
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

3.16 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

17.06 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

9.50 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

22.18 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.

37.90 s

Page Load Progression

3.9 s
7.9 s
11.8 s
15.7 s
19.7 s
23.6 s
27.6 s
31.5 s
Checks
16
7 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
13.2 MB transferred, 569 requests
FIX
13.2 MB transferred, 569 requests
Critical::
Page weighs 29.6 MB (13.2 MB transferred)
Warning::
JavaScript is 4.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.8 MB
Info::
Fonts are 466 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 466 KB
Warning::
569 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.8 g CO2 per page load
13.2 MB / 2.4 MB budget
13.2 MB transferred
569 requests
2.8 g CO2 per page load
JavaScript 4.8 MiB 36%
Other 3.7 MiB 28%
Other 3.2 MiB 24%
Images 690.6 KiB 5%
Fonts 465.9 KiB 3%
CSS 167.8 KiB 1%
HTML 135.6 KiB 1%
Other 83.9 KiB 1%
Other 6.1 KiB 0%
Other 450 B 0%
Other 348 B 0%
Other 0 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 (13.2 MiB of 13.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
31508ms total JS execution
FIX
31508ms total JS execution
Warning::
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585...: 5721ms CPU time
Warning::
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585...: 4278ms CPU time
Warning::
Unattributable: 3709ms CPU time
Warning::
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585...: 2773ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 2204ms CPU time
Warning::
Third-party scripts: 31508ms (100% of total)

Main Thread Breakdown

Script Evaluation 52% Other 28% Script Parsing & Compilation 8% Style & Layout 6%
ScriptTotalScriptingParse/CompileParty
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/6546-8d040fa63ef7b49f.js5721ms1358ms4ms3rd
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/framework-dbc4bb513a72eaeb.js4278ms3339ms18ms3rd
Unattributable3709ms320ms0ms3rd
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/pages/_app-3e6b26b2aca06c2f.js2773ms1858ms482ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js2204ms1550ms325ms3rd
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/pages/index-c2aca32e70ba68db.js1831ms1171ms6ms3rd
https://rivian.com/1703ms37ms2ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PZLGGN21499ms1188ms276ms3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js1474ms1164ms302ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ZK75JEL9E3&cx=c&gtm=4e64601042ms830ms194ms3rd

Showing top 10 of 25 scripts

F
JS Bundles
Action
126 scripts, 2.9 MB unused
FIX
126 scripts, 2.9 MB unused
Warning::
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585...: 731 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://sierra.chat/-/cdn/36S2kDpTX4v1ufbTnr_vNLgv...: 167 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.9 MB
2930 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/pages/_app-3e6b26b2aca06c2f.js1150 KB731 KB (64%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://sierra.chat/-/cdn/36S2kDpTX4v1ufbTnr_vNLgvnjk.js0 KB167 KB (74%)✓3rd
https://sierra.chat/-/cdn/36S2kDpTX4v1ufbTnr_vNLgvnjk.js224 KB167 KB (74%)✓3rd
https://rivian.com/root/_next/static/chunks/edbf9cd1-2999e1af1adf3667.js130 KB127 KB (98%)✓3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js257 KB116 KB (45%)✓3rd
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/6491.fbad14ea7130bc3b.js125 KB75 KB (60%)✓3rd
https://rivian.com/.next-b2d3d96a37d81208b9a4cb585d760f002837d16d-2411410260/_next/static/chunks/ea88be26.375858f3cf93f50c.js76 KB66 KB (87%)✓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
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
39 images, 0 KB saveable
REVIEW
39 images, 0 KB saveable
Info::
All images are well-optimized
39 images 691 KB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
13 fonts (466 KB)
PASS
13 fonts (466 KB)
Info::
13 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

13

466 KB total

Render-blocking

0

of 13

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s FCP 3.2 s LCP 17.1 shttps://assets.rivian.com/2md5qhoeajym/1Dv0kej9t7tDsPaJlXKU1J/09735d831d661afd8335a2cf9d36310c/Adventure-Regular.woff2Adventure-Regular.woff2 https://assets.rivian.com/2md5qhoeajym/1Dv0kej9t7tDsPaJlXKU1J/09735d831d661afd8335a2cf9d36310c/Adventure-Regular.woff2 — 33.4 KiB — 0 ms — font-display: swaphttps://assets.rivian.com/2md5qhoeajym/2KUubGptkAVAoZuBkZ01i8/8af6dfe3e22302422e0518934fc86679/Adventure-SemiBold.woff2Adventure-SemiBold.woff2 https://assets.rivian.com/2md5qhoeajym/2KUubGptkAVAoZuBkZ01i8/8af6dfe3e22302422e0518934fc86679/Adventure-SemiBold.woff2 — 32.4 KiB — 0 ms — font-display: swaphttps://assets.rivian.com/2md5qhoeajym/2KUubGptkAVAoZuBkZ01i8/812892ff786ddbd3305d16883d5a200b/Adventure-SemiBold.woff2Adventure-SemiBold.woff2 https://assets.rivian.com/2md5qhoeajym/2KUubGptkAVAoZuBkZ01i8/812892ff786ddbd3305d16883d5a200b/Adventure-SemiBold.woff2 — 32.4 KiB — 0 ms — font-display: swaphttps://assets.rivian.com/2md5qhoeajym/4LzEfmGSeWQppOcmiZuXlv/6445dc40baaa0706c8bb9603ec67e495/AdventureV1-Medium.otfAdventureV1-Medium.otf https://assets.rivian.com/2md5qhoeajym/4LzEfmGSeWQppOcmiZuXlv/6445dc40baaa0706c8bb9603ec67e495/AdventureV1-Medium.otf — 64.1 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/30f30b1f769d3a04-s.p.woff230f30b1f769d3a04-s.p.woff2 https://rivian.com/root/_next/static/media/30f30b1f769d3a04-s.p.woff2 — 35.5 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/330d5f793a65c589-s.p.woff2330d5f793a65c589-s.p.woff2 https://rivian.com/root/_next/static/media/330d5f793a65c589-s.p.woff2 — 32.7 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/5ce4453548831834-s.p.woff25ce4453548831834-s.p.woff2 https://rivian.com/root/_next/static/media/5ce4453548831834-s.p.woff2 — 33.0 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/8df70f690292c43d-s.p.woff28df70f690292c43d-s.p.woff2 https://rivian.com/root/_next/static/media/8df70f690292c43d-s.p.woff2 — 33.4 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/ac2519083dfd2fb4-s.p.woff2ac2519083dfd2fb4-s.p.woff2 https://rivian.com/root/_next/static/media/ac2519083dfd2fb4-s.p.woff2 — 34.5 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/dcf3a16bef731180-s.p.woff2dcf3a16bef731180-s.p.woff2 https://rivian.com/root/_next/static/media/dcf3a16bef731180-s.p.woff2 — 33.7 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/e42172ff1725af38-s.p.woff2e42172ff1725af38-s.p.woff2 https://rivian.com/root/_next/static/media/e42172ff1725af38-s.p.woff2 — 32.2 KiB — 0 ms — font-display: swaphttps://rivian.com/root/_next/static/media/f79e926d052f702c-s.p.woff2f79e926d052f702c-s.p.woff2 https://rivian.com/root/_next/static/media/f79e926d052f702c-s.p.woff2 — 34.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swap
Adventure-Regular.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Adventure-SemiBold.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Adventure-SemiBold.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
AdventureV1-Medium.otf otf swap
Size 64 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
30f30b1f769d3a04-s.p.woff2 woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
330d5f793a65c589-s.p.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
5ce4453548831834-s.p.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
8df70f690292c43d-s.p.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ac2519083dfd2fb4-s.p.woff2 woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
dcf3a16bef731180-s.p.woff2 woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
e42172ff1725af38-s.p.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
f79e926d052f702c-s.p.woff2 woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
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 ~19 KB and ~38 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
2
preload
2
dns-prefetch
—
prefetch
—

4 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
569 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 31508ms · 2174KB · $418/mo
rivian.com
Other
Costly
Execution 5721ms
Transfer 17 KB
Monthly Cost $76/mo
rivian.com
Other
Costly
Execution 4278ms
Transfer 44 KB
Monthly Cost $57/mo
Unattributable
Other
Costly
Execution 3709ms
Transfer 0 KB
Monthly Cost $49/mo
rivian.com
Other
Costly
Execution 2773ms
Transfer 1150 KB
Unused 64%
Monthly Cost $37/mo
www.gstatic.com
Other
Costly
Execution 2204ms
Transfer 0 KB
Unused 49%
Monthly Cost $29/mo
rivian.com
Other
Costly
Execution 1831ms
Transfer 26 KB
Monthly Cost $24/mo
rivian.com
Other
Costly
Execution 1703ms
Transfer 82 KB
Monthly Cost $23/mo
Google Tag Manager
Tag Manager
Costly
Execution 1499ms
Transfer 0 KB
Unused 26%
Monthly Cost $20/mo
cdn.ketchjs.com
Other
Costly
Execution 1474ms
Transfer 257 KB
Unused 45%
Monthly Cost $20/mo
Google Tag Manager
Tag Manager
Costly
Execution 1042ms
Transfer 0 KB
Unused 36%
Monthly Cost $14/mo
rivian.com
Other
Costly
Execution 762ms
Transfer 26 KB
Monthly Cost $10/mo
rivian.com
Other
Costly
Execution 756ms
Transfer 63 KB
Unused 52%
Monthly Cost $10/mo
rivian.com
Other
Costly
Execution 693ms
Transfer 62 KB
Unused 37%
Monthly Cost $9/mo
Google Tag Manager
Tag Manager
Costly
Execution 532ms
Transfer 0 KB
Unused 44%
Monthly Cost $7/mo
rivian.com
Other
Costly
Execution 471ms
Transfer 20 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 408ms
Transfer 0 KB
Unused 48%
Monthly Cost $5/mo
rivian.com
Other
Costly
Execution 376ms
Transfer 125 KB
Unused 60%
Monthly Cost $5/mo
rivian.com
Other
Costly
Execution 375ms
Transfer 130 KB
Unused 98%
Monthly Cost $5/mo
rivian.com
Other
Costly
Execution 281ms
Transfer 51 KB
Unused 50%
Monthly Cost $4/mo
unpkg
CDN
Optional
Execution 164ms
Transfer 0 KB
Monthly Cost $2/mo
rivian.com
Other
Optional
Execution 129ms
Transfer 19 KB
Monthly Cost $2/mo
sierra.chat
Other
Optional
Execution 115ms
Transfer 0 KB
Unused 74%
Monthly Cost $2/mo
rivian.com
Other
Optional
Execution 105ms
Transfer 37 KB
Monthly Cost $1/mo
rivian.com
Other
Optional
Execution 55ms
Transfer 63 KB
Unused 81%
Monthly Cost $1/mo
sierra.chat
Other
Optional
Execution 50ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • rivian.com adds 5721ms and costs ~$76/month
  • rivian.com adds 4278ms and costs ~$57/month
  • Unattributable adds 3709ms and costs ~$49/month
  • rivian.com adds 2773ms and costs ~$37/month
  • www.gstatic.com adds 2204ms and costs ~$29/month
  • rivian.com adds 1831ms and costs ~$24/month
  • rivian.com adds 1703ms and costs ~$23/month
  • Google Tag Manager adds 1499ms and costs ~$20/month
  • cdn.ketchjs.com adds 1474ms and costs ~$20/month
  • Google Tag Manager adds 1042ms and costs ~$14/month
  • rivian.com adds 762ms and costs ~$10/month
  • rivian.com adds 756ms and costs ~$10/month
  • rivian.com adds 693ms and costs ~$9/month
  • Google Tag Manager adds 532ms and costs ~$7/month
  • rivian.com adds 471ms and costs ~$6/month
  • Google Tag Manager adds 408ms and costs ~$5/month
  • rivian.com adds 376ms and costs ~$5/month
  • rivian.com adds 375ms and costs ~$5/month
  • rivian.com adds 281ms and costs ~$4/month

100% 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

rivian.com takes 5721ms 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

rivian.com takes 4278ms 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

Unattributable takes 3709ms 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

rivian.com takes 2773ms 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

64% of rivian.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.gstatic.com takes 2204ms 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

rivian.com takes 1831ms 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

rivian.com takes 1703ms 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

Google Tag Manager takes 1499ms 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

cdn.ketchjs.com takes 1474ms 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

Google Tag Manager takes 1042ms 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

rivian.com takes 762ms 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

rivian.com takes 756ms 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

52% of rivian.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

rivian.com takes 693ms 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

Google Tag Manager takes 532ms 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

rivian.com takes 471ms 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

Google Tag Manager takes 408ms 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

rivian.com takes 376ms 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

60% of rivian.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

rivian.com takes 375ms 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

98% of rivian.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

rivian.com takes 281ms 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

74% of sierra.chat's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

81% of rivian.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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