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https://www.waymo.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
1
PASS
8
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.
91
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

4.62 s

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

7.69 s

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

2.84 s

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

0.140

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

4.89 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.

27.40 s

Page Load Progression

384 ms
768 ms
1.2 s
1.5 s
1.9 s
2.3 s
2.7 s
3.1 s
Checks
16
8 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
10.3 MB transferred, 257 requests
FIX
10.3 MB transferred, 257 requests
Critical::
Page weighs 15.3 MB (10.3 MB transferred)
Warning::
Images are 2.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.5 MB
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Info::
CSS is 260 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 260 KB
Warning::
257 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.2 g CO2 per page load
10.3 MB / 2.4 MB budget
10.3 MB transferred
257 requests
2.2 g CO2 per page load
Other 5.6 MiB 54%
Images 2.5 MiB 24%
JavaScript 1.6 MiB 16%
CSS 260.0 KiB 2%
Fonts 187.5 KiB 2%
Other 98.1 KiB 1%
Other 57.3 KiB 1%
HTML 31.7 KiB 0%
Other 5.1 KiB 0%
Other 2.1 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

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.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

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.

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 (10.3 MiB of 10.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
10756ms total JS execution
FIX
10756ms total JS execution
Warning::
Unattributable: 2292ms CPU time
Warning::
https://waymo.com/assets/5Ug32AMK.min.js: 1513ms CPU time
Warning::
https://waymo.com/: 1309ms CPU time
Warning::
https://analytics.tiktok.com/i18n/pixel/static/mai...: 864ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KKT...: 743ms CPU time
Warning::
Third-party scripts: 10756ms (100% of total)

Main Thread Breakdown

Script Evaluation 44% Other 30% Script Parsing & Compilation 9% Style & Layout 9% Rendering 3%
ScriptTotalScriptingParse/CompileParty
Unattributable2292ms217ms0ms3rd
https://waymo.com/assets/5Ug32AMK.min.js1513ms517ms1ms3rd
https://waymo.com/1309ms58ms1ms3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js864ms530ms328ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KKT9SD7743ms625ms75ms3rd
https://www.googletagmanager.com/gtm.js?id=AW-460810383587ms506ms78ms3rd
https://www.googletagmanager.com/gtag/js?id=G-KDWQB0N19R&cx=c&gtm=4e6460513ms367ms81ms3rd
https://waymo.com/assets/CKET3U5t.min.js392ms11ms0ms3rd
https://connect.facebook.net/en_US/fbevents.js343ms211ms130ms3rd
https://www.googletagmanager.com/gtm.js?id=UA-62642502-1330ms275ms45ms3rd

Showing top 10 of 24 scripts

F
JS Bundles
Action
70 scripts, 597 KB unused
FIX
70 scripts, 597 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-460...: 105 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KKT...: 67 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-KDWQ...: 65 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=UA-6264...: 60 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=DC-129...: 60 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 597 KB
597 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=AW-460810383&cx=c&gtm=4e6460146 KB105 KB (72%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KKT9SD7185 KB67 KB (36%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-KDWQB0N19R&cx=c&gtm=4e6460156 KB65 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=UA-62642502-1125 KB60 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-12999053&cx=c&gtm=4e6460129 KB60 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-15900084&cx=c&gtm=4e6460129 KB56 KB (44%)✓3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js110 KB56 KB (51%)✓3rd
https://www.googletagmanager.com/gtm.js?id=AW-460810383146 KB53 KB (36%)✓3rd
https://waymo.com/assets/5Ug32AMK.min.js91 KB44 KB (48%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB32 KB (34%)✓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
93 images, 0 KB saveable
REVIEW
93 images, 0 KB saveable
Info::
All images are well-optimized
93 images 2.5 MB
0 oversized -0 KB
47 legacy format
0 missing dimensions CLS risk
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
5 fonts (187 KB)
PASS
5 fonts (187 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

187 KB total

Render-blocking

0

of 5

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 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 4.6 s LCP 7.7 shttps://waymo.com/fonts/GT-Walsheim-Regular-subset.woff2GT-Walsheim-Regular-sub... https://waymo.com/fonts/GT-Walsheim-Regular-subset.woff2 — 46.7 KiB — 0 ms — font-display: swaphttps://waymo.com/fonts/GT-Walsheim-Medium-subset.woff2GT-Walsheim-Medium-subs... https://waymo.com/fonts/GT-Walsheim-Medium-subset.woff2 — 45.4 KiB — 0 ms — font-display: swaphttps://waymo.com/fonts/SimplonBP-Regular.woff2SimplonBP-Regular.woff2 https://waymo.com/fonts/SimplonBP-Regular.woff2 — 32.2 KiB — 0 ms — font-display: swaphttps://waymo.com/fonts/SimplonBP-Medium.woff2SimplonBP-Medium.woff2 https://waymo.com/fonts/SimplonBP-Medium.woff2 — 33.2 KiB — 0 ms — font-display: swaphttps://waymo.com/fonts/SimplonMono-Regular-subset.woff2SimplonMono-Regular-sub... https://waymo.com/fonts/SimplonMono-Regular-subset.woff2 — 29.9 KiB — 0 ms — font-display: swap
GT-Walsheim-Regular-sub... woff2 swap
Size 47 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
GT-Walsheim-Medium-subs... woff2 swap
Size 45 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
SimplonBP-Regular.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
SimplonBP-Medium.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
SimplonMono-Regular-sub... woff2 swap
Size 30 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)
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
25 hints, 0 missing preconnects
PASS
25 hints, 0 missing preconnects
Info::
Page uses 25 resource hint(s)

Current Resource Hints

preconnect
4
preload
+4
14
dns-prefetch
3
prefetch
4

25 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Network Waterfall
257 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 10756ms · 1567KB · $62/mo
Unattributable
Other
Costly
Execution 2292ms
Transfer 0 KB
Monthly Cost $13/mo
waymo.com
Other
Costly
Execution 1513ms
Transfer 91 KB
Unused 48%
Monthly Cost $9/mo
waymo.com
Other
Costly
Execution 1309ms
Transfer 28 KB
Monthly Cost $8/mo
analytics.tiktok.com
Other
Costly
Execution 864ms
Transfer 110 KB
Unused 51%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 743ms
Transfer 185 KB
Unused 36%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 587ms
Transfer 146 KB
Unused 36%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 513ms
Transfer 156 KB
Unused 42%
Monthly Cost $3/mo
waymo.com
Other
Costly
Execution 392ms
Transfer 1 KB
Monthly Cost $2/mo
Facebook Pixel
Advertising
Costly
Execution 343ms
Transfer 95 KB
Unused 34%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 330ms
Transfer 125 KB
Unused 49%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 264ms
Transfer 129 KB
Unused 44%
Monthly Cost $2/mo
Facebook Pixel
Advertising
Costly
Execution 232ms
Transfer 37 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Costly
Execution 224ms
Transfer 129 KB
Unused 46%
Monthly Cost $1/mo
waymo.com
Other
Costly
Execution 211ms
Transfer 1 KB
Monthly Cost $1/mo
sc-static.net
Other
Optional
Execution 161ms
Transfer 25 KB
Monthly Cost $1/mo
Twitter/X Pixel
Advertising
Optional
Execution 143ms
Transfer 13 KB
Monthly Cost $1/mo
Google Analytics
Analytics
Optional
Execution 112ms
Transfer 21 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 102ms
Transfer 146 KB
Unused 72%
Monthly Cost $1/mo
js.adsrvr.org
Other
Optional
Execution 100ms
Transfer 11 KB
Monthly Cost $1/mo
LinkedIn Insight
Advertising
Optional
Execution 88ms
Transfer 19 KB
Monthly Cost $0/mo
Facebook Pixel
Advertising
Optional
Execution 71ms
Transfer 14 KB
Monthly Cost $0/mo
analytics.tiktok.com
Other
Optional
Execution 55ms
Transfer 40 KB
Monthly Cost $0/mo
www.gstatic.com
Other
Optional
Execution 55ms
Transfer 27 KB
Monthly Cost $0/mo
www.redditstatic.com
Other
Optional
Execution 54ms
Transfer 19 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • Unattributable adds 2292ms and costs ~$13/month
  • waymo.com adds 1513ms and costs ~$9/month
  • waymo.com adds 1309ms and costs ~$8/month
  • analytics.tiktok.com adds 864ms and costs ~$5/month
  • Google Tag Manager adds 743ms and costs ~$4/month
  • Google Tag Manager adds 587ms and costs ~$3/month
  • Google Tag Manager adds 513ms and costs ~$3/month
  • waymo.com adds 392ms and costs ~$2/month
  • Facebook Pixel adds 343ms and costs ~$2/month
  • Google Tag Manager adds 330ms and costs ~$2/month
  • Google Tag Manager adds 264ms and costs ~$2/month
  • Facebook Pixel adds 232ms and costs ~$1/month
  • Google Tag Manager adds 224ms and costs ~$1/month
  • waymo.com adds 211ms and costs ~$1/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

Unattributable takes 2292ms 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

waymo.com takes 1513ms 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

waymo.com takes 1309ms 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

analytics.tiktok.com takes 864ms 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

51% of analytics.tiktok.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

Google Tag Manager takes 743ms 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 587ms 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 513ms 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

waymo.com takes 392ms 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

Facebook Pixel takes 343ms 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 330ms 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 264ms 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

Facebook Pixel takes 232ms 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 224ms 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

waymo.com takes 211ms 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

72% of Google Tag Manager'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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