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https://www.peloton.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
3
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
37
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.
92
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.

3.03 s

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

19.61 s

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

1.45 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.

8.04 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.

19.90 s

Page Load Progression

625 ms
1.3 s
1.9 s
2.5 s
3.1 s
3.8 s
4.4 s
5.0 s
Checks
16
9 PASS 2 REVIEW 3 FIX
F
Page Weight Budget
Action
4.2 MB transferred, 153 requests
FIX
4.2 MB transferred, 153 requests
Critical::
Page weighs 8.6 MB (4.2 MB transferred)
Warning::
Images are 2.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.2 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
Warning::
153 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.88 g CO2 per page load
4.2 MB / 2.4 MB budget
4.2 MB transferred
153 requests
0.88 g CO2 per page load
Images 2.2 MiB 53%
JavaScript 1.6 MiB 38%
Fonts 143.2 KiB 3%
Other 115.4 KiB 3%
HTML 34.5 KiB 1%
CSS 33.1 KiB 1%
Other 32.6 KiB 1%
Other 7.6 KiB 0%
Other 558 B 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

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

F
JS Execution Cost
Action
7850ms total JS execution
FIX
7850ms total JS execution
Warning::
https://scripts.clarity.ms/0.8.60-beta/clarity.js: 1842ms CPU time
Warning::
https://www.peloton.com/: 1184ms CPU time
Warning::
Unattributable: 1159ms CPU time
Warning::
https://unpkg.com/@dotlottie/player-component@late...: 952ms CPU time
Warning::
https://js.hs-analytics.net/analytics/177559320000...: 765ms CPU time
Warning::
Third-party scripts: 6164ms (79% of total)

Main Thread Breakdown

Script Evaluation 56% Other 19% Style & Layout 10% Script Parsing & Compilation 8% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://scripts.clarity.ms/0.8.60-beta/clarity.js1842ms1307ms11ms3rd
https://www.peloton.com/1184ms201ms250ms1st
Unattributable1159ms27ms0ms3rd
https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.js952ms852ms0ms3rd
https://js.hs-analytics.net/analytics/1775593200000/21730018.js765ms519ms12ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WFZLP8J2365ms293ms56ms3rd
https://www.peloton.com/hubfs/hub_generated/template_assets/1/183226165104/1775483930631/template_jquery.min.js340ms185ms41ms1st
https://www.googletagmanager.com/gtag/js?id=AW-16508021088312ms260ms49ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TZN35GWCZ2&cx=c&gtm=4e6460309ms249ms57ms3rd
https://www.peloton.com/_hcms/forms/v2.js162ms83ms75ms1st

Showing top 10 of 15 scripts

D
JS Bundles
Action
39 scripts, 435 KB unused
FIX
39 scripts, 435 KB unused
Warning::
https://www.peloton.com/_hcms/forms/v2.js: 112 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-165...: 105 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-TZN3...: 66 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WFZ...: 62 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-165...: 55 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 435 KB
435 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.peloton.com/_hcms/forms/v2.js201 KB112 KB (58%)✓1st
https://www.googletagmanager.com/gtag/js?id=AW-16508021088&cx=c&gtm=4e6460143 KB105 KB (74%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-TZN35GWCZ2&cx=c&gtm=4e6460161 KB66 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WFZLP8J2152 KB62 KB (41%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-16508021088143 KB55 KB (39%)✓3rd
https://www.peloton.com/hubfs/hub_generated/template_assets/1/183226165104/1775483930631/template_jquery.min.js84 KB34 KB (41%)✗1st
https://7052064.fs1.hubspotusercontent-na1.net/hubfs/7052064/hub_generated/module_assets/1/-2712622/1775507757444/module_search_input.min.js2 KB—✓3rd
https://js.hscollectedforms.net/collectedforms.js26 KB—✓3rd
https://www.peloton.com/hubfs/hub_generated/module_assets/1/183221847562/1765462489901/module_Header_Navigation.min.js3 KB—✓1st
https://seo-fixer.writesonic.com/site-audit/fixer-script/index.js2 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

B
Image Optimization
41 images, 0 KB saveable
REVIEW
41 images, 0 KB saveable
Info::
All images are well-optimized
41 images 2.2 MB
0 oversized -0 KB
27 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
Third-Party Impact
34% third-party, 0 ms blocking
PASS
34% third-party, 0 ms blocking
Info::
Third-party code accounts for 34% of page weight (1.4 MiB of 4.2 MiB)
Info::
Third-party blocking time is low (0 ms)
66%
34%
First-party Third-party
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 (143 KB)
PASS
5 fonts (143 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

143 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 3.0 s LCP 19.6 shttps://www.peloton.com/_hcms/googlefonts/Lato/regular.woff2regular.woff2 https://www.peloton.com/_hcms/googlefonts/Lato/regular.woff2 — 15.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/librefranklin/v20/jizDREVItHgc8qDIbSTKq4XkRiUf2zc.woff2jizDREVItHgc8qDIbSTKq4X... https://fonts.gstatic.com/s/librefranklin/v20/jizDREVItHgc8qDIbSTKq4XkRiUf2zc.woff2 — 28.6 KiB — 0 ms — font-display: swaphttps://www.peloton.com/_hcms/googlefonts/Lato/700.woff2700.woff2 https://www.peloton.com/_hcms/googlefonts/Lato/700.woff2 — 15.8 KiB — 0 ms — font-display: swaphttps://21730018.fs1.hubspotusercontent-na1.net/hubfs/21730018/raw_assets/public/Stage%20Peloton/Fonts/Univers%2067%20Condensed%20Bold/Univers-CondensedBold.woff2Univers-CondensedBold.w... https://21730018.fs1.hubspotusercontent-na1.net/hubfs/21730018/raw_assets/public/Stage%20Peloton/Fonts/Univers%2067%20Condensed%20Bold/Univers-CondensedBold.woff2 — 12.0 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/inter/v20/UcCo3FwrK3iLTcviYwY.woff2UcCo3FwrK3iLTcviYwY.woff2 https://fonts.gstatic.com/s/inter/v20/UcCo3FwrK3iLTcviYwY.woff2 — 71.2 KiB — 0 ms — font-display: swap
regular.woff2 woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
jizDREVItHgc8qDIbSTKq4X... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
700.woff2 woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Univers-CondensedBold.w... woff2 swap
Size 12 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
UcCo3FwrK3iLTcviYwY.woff2 woff2 swap
Size 71 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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+
HTTP Caching
max-age=5 (5 seconds)
PASS
max-age=5 (5 seconds)
Info::
Cache-Control header is set
Got: s-maxage=36000, max-age=5
Info::
Effective TTL: 5 seconds (max-age=5)
Info::
CDN TTL: 10 hours (s-maxage=36000)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

s-maxage=36000, max-age=5

DirectiveValueMeaning
s-maxage36000CDN caches for 10 hours
max-age5Cache for 5 seconds
Effective TTL: 5 seconds
Network Waterfall
153 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
79% of JavaScript execution is third-party
First-party Third-party 6164ms · 766KB · €67/mo
Microsoft Clarity
Session Replay
Costly
Execution 1842ms
Transfer 25 KB
Monthly Cost €20/mo
Unattributable
Other
Costly
Execution 1159ms
Transfer 0 KB
Monthly Cost €13/mo
unpkg
CDN
Costly
Execution 952ms
Transfer 0 KB
Monthly Cost €10/mo
HubSpot Analytics
Analytics
Costly
Execution 765ms
Transfer 43 KB
Monthly Cost €8/mo
Google Tag Manager
Tag Manager
Costly
Execution 365ms
Transfer 152 KB
Unused 41%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 312ms
Transfer 143 KB
Unused 39%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 309ms
Transfer 161 KB
Unused 41%
Monthly Cost €3/mo
js.hscollectedforms.net
Other
Optional
Execution 98ms
Transfer 26 KB
Monthly Cost €1/mo
js.hubspot.com
Other
Optional
Execution 97ms
Transfer 28 KB
Monthly Cost €1/mo
LinkedIn Insight
Advertising
Optional
Execution 95ms
Transfer 19 KB
Monthly Cost €1/mo
js.hs-banner.com
Other
Optional
Execution 94ms
Transfer 26 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 77ms
Transfer 143 KB
Unused 74%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Microsoft Clarity adds 1842ms and costs ~€20/month
  • Unattributable adds 1159ms and costs ~€13/month
  • unpkg adds 952ms and costs ~€10/month
  • HubSpot Analytics adds 765ms and costs ~€8/month
  • Google Tag Manager adds 365ms and costs ~€4/month
  • Google Tag Manager adds 312ms and costs ~€3/month
  • Google Tag Manager adds 309ms and costs ~€3/month

79% 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

Microsoft Clarity takes 1842ms 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 1159ms 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

unpkg takes 952ms 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

HubSpot Analytics takes 765ms 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 365ms 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 312ms 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 309ms 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 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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