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https://www.peloton.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
3
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
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.

787 ms

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

1.55 s

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

26 ms

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

0.005

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

2.43 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.

3.97 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
14
7 PASS 2 REVIEW 3 FIX
F
Page Weight Budget
Action
5.2 MB transferred, 146 requests
FIX
5.2 MB transferred, 146 requests
Critical::
Page weighs 9.6 MB (5.2 MB transferred)
Warning::
Images are 3.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.4 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::
146 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.1 g CO2 per page load
5.2 MB / 2.4 MB budget
5.2 MB transferred
146 requests
1.1 g CO2 per page load
Images 3.4 MiB 64%
JavaScript 1.6 MiB 30%
Other 116.1 KiB 2%
Fonts 56.2 KiB 1%
HTML 34.5 KiB 1%
Other 32.7 KiB 1%
CSS 29.2 KiB 1%
Other 7.9 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

D
JS Execution Cost
Action
2213ms total JS execution
FIX
2213ms total JS execution
Warning::
https://scripts.clarity.ms/0.8.60-beta/clarity.js: 503ms CPU time
Warning::
https://unpkg.com/@dotlottie/player-component@late...: 422ms CPU time
Warning::
https://www.peloton.com/: 417ms CPU time
Warning::
Unattributable: 324ms CPU time
Info::
https://js.hs-analytics.net/analytics/177559320000...: 189ms CPU time
Warning::
Third-party scripts: 1723ms (78% of total)

Main Thread Breakdown

Script Evaluation 58% Other 17% Style & Layout 10% Script Parsing & Compilation 7% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://scripts.clarity.ms/0.8.60-beta/clarity.js503ms372ms3ms3rd
https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.js422ms349ms0ms3rd
https://www.peloton.com/417ms52ms65ms1st
Unattributable324ms8ms0ms3rd
https://js.hs-analytics.net/analytics/1775593200000/21730018.js189ms128ms4ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-16508021088106ms77ms12ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WFZLP8J293ms77ms14ms3rd
https://www.googletagmanager.com/gtag/js?id=G-TZN35GWCZ2&cx=c&gtm=4e646085ms65ms19ms3rd
https://www.peloton.com/hubfs/hub_generated/template_assets/1/183226165104/1775483930631/template_jquery.min.js73ms55ms11ms1st
D
JS Bundles
Action
39 scripts, 436 KB unused
FIX
39 scripts, 436 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...: 56 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 436 KB
436 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 KB56 KB (39%)✓3rd
https://www.peloton.com/hubfs/hub_generated/template_assets/1/183226165104/1775483930631/template_jquery.min.js84 KB35 KB (42%)✗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
35 images, 0 KB saveable
REVIEW
35 images, 0 KB saveable
Warning::
https://www.peloton.com/hubfs/platform-title.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
35 images 3.4 MB
0 oversized -0 KB
17 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Third-Party Impact
26% third-party, 0 ms blocking
PASS
26% third-party, 0 ms blocking
Info::
Third-party code accounts for 26% of page weight (1.3 MiB of 5.2 MiB)
Info::
Third-party blocking time is low (0 ms)
74%
26%
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
3 fonts (56 KB)
PASS
3 fonts (56 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

56 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 787 ms LCP 1.5 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://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: 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
Univers-CondensedBold.w... woff2 swap
Size 12 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+
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
146 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
78% of JavaScript execution is third-party
First-party Third-party 1723ms · 524KB · €19/mo
Microsoft Clarity
Session Replay
Costly
Execution 503ms
Transfer 25 KB
Monthly Cost €5/mo
unpkg
CDN
Costly
Execution 422ms
Transfer 0 KB
Monthly Cost €5/mo
Unattributable
Other
Costly
Execution 324ms
Transfer 0 KB
Monthly Cost €4/mo
HubSpot Analytics
Analytics
Optional
Execution 189ms
Transfer 43 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 106ms
Transfer 143 KB
Unused 39%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 93ms
Transfer 152 KB
Unused 41%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 85ms
Transfer 161 KB
Unused 41%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Microsoft Clarity adds 503ms and costs ~€5/month
  • unpkg adds 422ms and costs ~€5/month
  • Unattributable adds 324ms and costs ~€4/month

78% 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 503ms 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 422ms 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 324ms 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

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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