Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.21 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.21 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
433 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.12 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.
4.35 s
Page Load Progression
FPage Weight BudgetAction7.1 MB transferred, 92 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
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.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction14193ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13265/scripts/pages/homepage/default/index.js | 10443ms | 3257ms | 119ms | 3rd |
| https://www.squarespace.com/ | 2620ms | 6ms | 4ms | 3rd |
| Unattributable | 647ms | 8ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-BCCP | 253ms | 207ms | 19ms | 3rd |
| https://www.squarespace.com/scripts/chunks/4721.js | 173ms | 99ms | 57ms | 3rd |
| https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13265/scripts/globals/performance.js | 57ms | 48ms | 2ms | 3rd |
FJS BundlesAction15 scripts, 769 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.squarespace.com/scripts/chunks/4721.js | 717 KB | 527 KB (73%) | ✓ | 3rd |
| https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13265/scripts/pages/homepage/default/index.js | 579 KB | 71 KB (19%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-BCCP | 190 KB | 60 KB (32%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/extract-css-moment-js-vendor-6f2a1f6ec9a41489-min.en-US.js | 60 KB | 60 KB (100%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/user-account-core-502565b710d4efd4-min.en-US.js | 32 KB | 32 KB (99%) | ✓ | 3rd |
| https://consent.trustarc.com/asset/notice.js/v/v1.7-1729 | 36 KB | 20 KB (56%) | ✓ | 3rd |
| https://consent.trustarc.com/notice?domain=squarespace.com&c=teconsent&js=nj¬iceType=bb&text=true&pn=2>m=1&pcookie&language=en | 13 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/@sqs/polyfiller/1.6/modern.js | 42 KB | — | ✓ | 3rd |
| https://static1.squarespace.com/static/ta/5134cbefe4b0c6fb04df8065/13265/scripts/globals/performance.js | 23 KB | — | ✓ | 3rd |
| https://www.squarespace.com/scripts/chunks/4440.js | 15 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction92 resources · 7.1 MB · 769 KB savings availableFIX
~769.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 92 resources | 7.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization42 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (319 KB)PASS
Web fonts
6
319 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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 ~16 KB and ~32 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall92 requests over 32462msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
static1.squarespace.com static1.squarespace.com | Other | 10443ms | 579 KB | 19% | $60/mo | Costly |
www.squarespace.com www.squarespace.com | Other | 2620ms | 88 KB | — | $15/mo | Costly |
Unattributable Unattributable | Other | 647ms | 0 KB | — | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 253ms | 190 KB | 32% | $1/mo | Costly |
www.squarespace.com www.squarespace.com | Other | 173ms | 717 KB | 73% | $1/mo | Optional |
static1.squarespace.com static1.squarespace.com | Other | 57ms | 23 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- static1.squarespace.com adds 10443ms and costs ~$60/month
- www.squarespace.com adds 2620ms and costs ~$15/month
- Unattributable adds 647ms and costs ~$4/month
- Google Tag Manager adds 253ms and costs ~$1/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 10443ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.squarespace.com takes 2620ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 647ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 253ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
73% of www.squarespace.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev