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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
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.

8.03 s

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

24.77 s

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

4.68 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.

16.76 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.

27.82 s

Page Load Progression

1.9 s
3.9 s
5.8 s
7.7 s
9.6 s
11.6 s
13.5 s
15.4 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
6.5 MB transferred, 164 requests
FIX
6.5 MB transferred, 164 requests
Critical::
Page weighs 14.7 MB (6.5 MB transferred)
Warning::
JavaScript is 2.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.4 MB
Warning::
Images are 1.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.9 MB
Info::
Fonts are 265 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 265 KB
Warning::
164 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.4 g CO2 per page load
6.5 MB / 2.4 MB budget
6.5 MB transferred
164 requests
1.4 g CO2 per page load
JavaScript 2.4 MiB 38%
Images 1.9 MiB 29%
Other 1.7 MiB 27%
Fonts 264.7 KiB 4%
HTML 89.6 KiB 1%
Other 67.1 KiB 1%
CSS 22.8 KiB 0%
Other 10.7 KiB 0%
Other 4.8 KiB 0%
Other 699 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

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

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
90% third-party, 0 ms blocking
FIX
90% third-party, 0 ms blocking
Warning::
Third-party code accounts for 90% of page weight (5.8 MiB of 6.5 MiB)
Info::
Third-party blocking time is low (0 ms)
90%
First-party Third-party
F
JS Execution Cost
Action
43476ms total JS execution
FIX
43476ms total JS execution
Warning::
https://static1.squarespace.com/static/ta/5134cbef...: 29771ms CPU time
Warning::
https://www.squarespace.com/: 3977ms CPU time
Warning::
Unattributable: 3351ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-BCC...: 1083ms CPU time
Warning::
https://www.squarespace.com/scripts/chunks/3387.js: 795ms CPU time
Warning::
Third-party scripts: 38633ms (89% of total)

Main Thread Breakdown

Other 48% Script Evaluation 33% Style & Layout 9% Rendering 4% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/pages/homepage/default/index.js29771ms9666ms374ms3rd
https://www.squarespace.com/3977ms17ms16ms1st
Unattributable3351ms238ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-BCCP1083ms831ms143ms3rd
https://www.squarespace.com/scripts/chunks/3387.js795ms471ms226ms1st
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/globals/performance.js742ms218ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-9658484&cx=c&gtm=4e6420h2673ms622ms45ms3rd
https://consent.trustarc.com/notice?domain=squarespace.com&c=teconsent&js=nj&noticeType=bb&text=true&pn=2&gtm=1&pcookie&language=en432ms321ms5ms3rd
https://www.googletagmanager.com/gtag/destination?id=AW-1012071506&cx=c&gtm=4e6420h2417ms349ms66ms3rd
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/abtests/german-pricing-nav.js296ms252ms33ms3rd

Showing top 10 of 23 scripts

F
JS Bundles
Action
37 scripts, 939 KB unused
FIX
37 scripts, 939 KB unused
Warning::
https://www.squarespace.com/scripts/chunks/3387.js: 367 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static1.squarespace.com/static/ta/5134cbef...: 128 KB unused (23%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-1L8C...: 67 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 60 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=DC-965...: 59 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 939 KB
939 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.squarespace.com/scripts/chunks/3387.js545 KB367 KB (67%)✓1st
https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13236/scripts/pages/homepage/default/index.js548 KB128 KB (23%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-1L8CXRNJCG&cx=c&gtm=4e6420h2169 KB67 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-1012071506&cx=c&gtm=4e6420h2144 KB60 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-9658484&cx=c&gtm=4e6420h2130 KB59 KB (45%)✓3rd
https://www.googletagmanager.com/gtag/js?id=DC-8103537&cx=c&gtm=4e6420h2131 KB54 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-BCCP188 KB46 KB (24%)✓3rd
https://assets.squarespace.com/universal/scripts-compressed/extract-css-moment-js-vendor-6f2a1f6ec9a41489-min.en-US.js44 KB44 KB (100%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB33 KB (35%)✓3rd
https://assets.squarespace.com/universal/scripts-compressed/user-account-core-1d75f367a379d0ed-min.en-US.js32 KB32 KB (99%)✓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.
Info::
ETag present — enables conditional (304) responses

No Cache-Control header

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

B
Image Optimization
50 images, 0 KB saveable
REVIEW
50 images, 0 KB saveable
Warning::
https://consent.trustarc.com/get?name=privacy_choi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
50 images 1.9 MB
0 oversized -0 KB
10 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+
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 (265 KB)
PASS
5 fonts (265 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

265 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 22.0 s 24.0 s 26.0 s FCP 8.0 s LCP 24.8 shttps://media-www.sqspcdn.com/fonts/clarkson-500.woff2clarkson-500.woff2 https://media-www.sqspcdn.com/fonts/clarkson-500.woff2 — 41.8 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-400.woff2clarkson-400.woff2 https://media-www.sqspcdn.com/fonts/clarkson-400.woff2 — 40.5 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-300.woff2clarkson-300.woff2 https://media-www.sqspcdn.com/fonts/clarkson-300.woff2 — 40.5 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-serif-400.woff2clarkson-serif-400.woff2 https://media-www.sqspcdn.com/fonts/clarkson-serif-400.woff2 — 71.0 KiB — 0 ms — font-display: swaphttps://media-www.sqspcdn.com/fonts/clarkson-serif-300.woff2clarkson-serif-300.woff2 https://media-www.sqspcdn.com/fonts/clarkson-serif-300.woff2 — 70.8 KiB — 0 ms — font-display: swap
clarkson-500.woff2 woff2 swap
Size 42 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-400.woff2 woff2 swap
Size 41 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-300.woff2 woff2 swap
Size 41 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-serif-400.woff2 woff2 swap
Size 71 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
clarkson-serif-300.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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
1
preload
2
dns-prefetch
—
prefetch
—

3 resource hints configured

Network Waterfall
164 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
89% of JavaScript execution is third-party
First-party Third-party 38633ms · 1800KB · $221/mo
static1.squarespace.com
Other
Costly
Execution 29771ms
Transfer 548 KB
Unused 23%
Monthly Cost $170/mo
Unattributable
Other
Costly
Execution 3351ms
Transfer 0 KB
Monthly Cost $19/mo
Google Tag Manager
Tag Manager
Costly
Execution 1083ms
Transfer 188 KB
Unused 24%
Monthly Cost $6/mo
static1.squarespace.com
Other
Costly
Execution 742ms
Transfer 23 KB
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 673ms
Transfer 130 KB
Unused 45%
Monthly Cost $4/mo
consent.trustarc.com
Other
Costly
Execution 432ms
Transfer 13 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 417ms
Transfer 144 KB
Unused 42%
Monthly Cost $2/mo
static1.squarespace.com
Other
Costly
Execution 296ms
Transfer 73 KB
Unused 41%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 290ms
Transfer 169 KB
Unused 39%
Monthly Cost $2/mo
Facebook Pixel
Advertising
Costly
Execution 272ms
Transfer 16 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 205ms
Transfer 131 KB
Unused 41%
Monthly Cost $1/mo
Facebook Pixel
Advertising
Costly
Execution 201ms
Transfer 95 KB
Unused 35%
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 153ms
Transfer 27 KB
Monthly Cost $1/mo
utt.impactcdn.com
Other
Optional
Execution 140ms
Transfer 21 KB
Monthly Cost $1/mo
static1.squarespace.com
Other
Optional
Execution 134ms
Transfer 32 KB
Monthly Cost $1/mo
assets.squarespace.com
Other
Optional
Execution 128ms
Transfer 42 KB
Monthly Cost $1/mo
Facebook Pixel
Advertising
Optional
Execution 105ms
Transfer 38 KB
Monthly Cost $1/mo
assets.squarespace.com
Other
Optional
Execution 100ms
Transfer 44 KB
Unused 100%
Monthly Cost $1/mo
c.hrzn-nxt.com
Other
Optional
Execution 83ms
Transfer 30 KB
Monthly Cost $0/mo
consent.trustarc.com
Other
Optional
Execution 57ms
Transfer 36 KB
Unused 56%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • static1.squarespace.com adds 29771ms and costs ~$170/month
  • Unattributable adds 3351ms and costs ~$19/month
  • Google Tag Manager adds 1083ms and costs ~$6/month
  • static1.squarespace.com adds 742ms and costs ~$4/month
  • Google Tag Manager adds 673ms and costs ~$4/month
  • consent.trustarc.com adds 432ms and costs ~$2/month
  • Google Tag Manager adds 417ms and costs ~$2/month
  • static1.squarespace.com adds 296ms and costs ~$2/month
  • Google Tag Manager adds 290ms and costs ~$2/month
  • Facebook Pixel adds 272ms and costs ~$2/month
  • Google Tag Manager adds 205ms and costs ~$1/month
  • Facebook Pixel adds 201ms and costs ~$1/month

89% 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

static1.squarespace.com takes 29771ms 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 3351ms 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 1083ms 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

static1.squarespace.com takes 742ms 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 673ms 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

consent.trustarc.com takes 432ms 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 417ms 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

static1.squarespace.com takes 296ms 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 290ms 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 272ms 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 205ms 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 201ms 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

100% of assets.squarespace.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

56% of consent.trustarc.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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