Performance
· 23 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.
1.03 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.51 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
71 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.002
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.47 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.
2.53 s
Page Load Progression
DThird-Party ImpactAction98% third-party, 0 ms blockingFIX
DPage Weight InventoryAction74 resources · 2.0 MB · 275 KB savings availableFIX
~275.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 74 resources | 2.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction2.0 MB transferred, 74 requestsREVIEW
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
BJS Execution Cost860ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://assets.squarespace.com/universal/scripts-compressed/common-8254165530deacc8-min.en-US.js | 384ms | 166ms | 20ms | 3rd |
| https://www.lindaschlapfer.com/ | 158ms | 5ms | 3ms | 1st |
| https://static1.squarespace.com/static/vta/5c5a519771c10ba3470d8101/scripts/8706.f409b65d6cb08c30fef4.js | 120ms | 101ms | 1ms | 3rd |
| https://static1.squarespace.com/static/vta/5c5a519771c10ba3470d8101/scripts/site-bundle.9ad4428074df7afb73619ace1a54f3c9.js | 104ms | 57ms | 2ms | 3rd |
| Unattributable | 94ms | 3ms | 0ms | 1st |
CJS BundlesAction40 scripts, 275 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://assets.squarespace.com/universal/scripts-compressed/common-8254165530deacc8-min.en-US.js | 251 KB | 146 KB (62%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-vendors-907ce232a97e184a-min.en-US.js | 180 KB | 61 KB (37%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-vendors-stable-784b947826b4c445-min.en-US.js | 70 KB | 40 KB (58%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/extract-css-moment-js-vendor-a5cfdec1ae227f33-min.en-US.js | 44 KB | 28 KB (98%) | ✓ | 3rd |
| https://definitions.sqspcdn.com/website-component-definition/static-assets/website.components.imageFluid/d529e0f6-8c71-4eec-89f2-7c230ec5a547_943/image-effect-parallax.js | 2 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/cldr-resource-pack-2c5e18cab442f0cf-min.en-US.js | 15 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/extract-css-runtime-79902c58cd1ae92d-min.en-US.js | 18 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/visitor-site-error-reporter-857906e2f8b59eb7-min.en-US.js | 2 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/@sqs/polyfiller/1.7.7/modern.js | 12 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/performance-9341a4eb5b144655-min.en-US.js | 33 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CDocument CompressionActionDocument response served uncompressedREVIEW
BAsset Compression2 of 3 asset hosts still on gzipREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
AImage Optimization11 images, 0 KB saveablePASS
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font Loading8 fonts (143 KB)PASS
Web fonts
8
143 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Network Waterfall74 requests over 999msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
assets.squarespace.com assets.squarespace.com | Other | 384ms | 251 KB | 62% | $2/mo | Costly |
static1.squarespace.com static1.squarespace.com | Other | 120ms | 14 KB | — | $1/mo | Optional |
static1.squarespace.com static1.squarespace.com | Other | 104ms | 38 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- assets.squarespace.com adds 384ms and costs ~$2/month
71% 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
assets.squarespace.com takes 384ms 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
62% of assets.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
Image Optimization11 images, 860 KB total, 325 KB wastedINFO
Image Optimization Audit
Total Images
11
Total Size
860 KB
Oversized
3
Wasted
325 KB