Performance
· 26 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.
17.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
25.80 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.50 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.
17.88 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.
26.50 s
Page Load Progression
FPage Weight BudgetAction31.0 MB transferred, 103 requestsFIX
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
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
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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction8691ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://assets.squarespace.com/universal/scripts-compressed/19085-081d931e05f25f02-min.en-US.js | 4768ms | 3977ms | 3ms | 3rd |
| Unattributable | 919ms | 7ms | 0ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-6a459dad7444b31d-min.en-US.js | 815ms | 650ms | 115ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/async-editor-render-form-ff851040cbd40bc9-min.en-US.js | 532ms | 461ms | 1ms | 3rd |
| https://www.thisispaperroute.com/ | 397ms | 8ms | 9ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/U5VsmTDhJM1iOJUyw4DEUTYv/recaptcha__en.js | 247ms | 178ms | 61ms | 3rd |
| https://static1.squarespace.com/static/vta/5c5a519771c10ba3470d8101/scripts/site-bundle.24618f321442829cf50ddb341e64781c.js | 204ms | 130ms | 7ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/37231-b90ed72cfa0f5072-min.en-US.js | 147ms | 137ms | 10ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/performance-c704c05d211c44da-min.en-US.js | 133ms | 18ms | 2ms | 3rd |
| https://definitions.sqspcdn.com/website-component-definition/static-assets/website.components.video/6a2c9905-a8ae-44bd-a6af-a4865786c86e_278/website.components.video.visitor.js | 113ms | 58ms | 49ms | 3rd |
Showing top 10 of 15 scripts
FJS BundlesAction54 scripts, 1001 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/U5VsmTDhJM1iOJUyw4DEUTYv/recaptcha__en.js | 0 KB | 175 KB (48%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/U5VsmTDhJM1iOJUyw4DEUTYv/recaptcha__en.js | 364 KB | 175 KB (48%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/U5VsmTDhJM1iOJUyw4DEUTYv/recaptcha__en.js | 365 KB | 175 KB (48%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-6a459dad7444b31d-min.en-US.js | 274 KB | 159 KB (58%) | ✓ | 3rd |
| https://definitions.sqspcdn.com/website-component-definition/static-assets/website.components.video/6a2c9905-a8ae-44bd-a6af-a4865786c86e_278/website.components.video.visitor.js | 235 KB | 124 KB (53%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-vendors-a5542c2814272dd7-min.en-US.js | 168 KB | 62 KB (37%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/extract-css-moment-js-vendor-6f2a1f6ec9a41489-min.en-US.js | 44 KB | 43 KB (98%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-vendors-stable-b8d716935110c7b2-min.en-US.js | 69 KB | 40 KB (59%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/37231-b90ed72cfa0f5072-min.en-US.js | 46 KB | 27 KB (58%) | ✓ | 3rd |
| https://definitions.sqspcdn.com/website-component-definition/static-assets/website.components.imageFluid/ff18e480-0c5b-4c28-9a9b-b5cd2faf2628_520/748.js | 27 KB | 21 KB (76%) | ✓ | 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 InventoryAction103 resources · 31.0 MB · 1001 KB savings availableFIX
~1000.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 31.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BCSS Performance Depth2 CSS depth issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
AImage Optimization8 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 Loading4 fonts (468 KB)PASS
Web fonts
4
468 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~337 KB and ~674 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 resource hints configured
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
Network Waterfall103 requests over 7079msINFO
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 | 4768ms | 15 KB | — | CA$37/mo | Costly |
Unattributable Unattributable | Other | 919ms | 0 KB | — | CA$7/mo | Costly |
assets.squarespace.com assets.squarespace.com | Other | 815ms | 274 KB | 58% | CA$6/mo | Costly |
assets.squarespace.com assets.squarespace.com | Other | 532ms | 4 KB | — | CA$4/mo | Costly |
www.thisispaperroute.com www.thisispaperroute.com | Other | 397ms | 35 KB | — | CA$3/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 247ms | 0 KB | 48% | CA$2/mo | Costly |
static1.squarespace.com static1.squarespace.com | Other | 204ms | 37 KB | — | CA$2/mo | Costly |
assets.squarespace.com assets.squarespace.com | Other | 147ms | 46 KB | 58% | CA$1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 133ms | 9 KB | — | CA$1/mo | Optional |
definitions.sqspcdn.com definitions.sqspcdn.com | Other | 113ms | 235 KB | 53% | CA$1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 112ms | 42 KB | — | CA$1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 83ms | 168 KB | 37% | CA$1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 81ms | 44 KB | 98% | CA$1/mo | Optional |
static1.squarespace.com static1.squarespace.com | Other | 73ms | 108 KB | — | CA$1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 66ms | 20 KB | — | CA$1/mo | Optional |
These scripts may cost more than they're worth
- assets.squarespace.com adds 4768ms and costs ~CA$37/month
- Unattributable adds 919ms and costs ~CA$7/month
- assets.squarespace.com adds 815ms and costs ~CA$6/month
- assets.squarespace.com adds 532ms and costs ~CA$4/month
- www.thisispaperroute.com adds 397ms and costs ~CA$3/month
- www.gstatic.com adds 247ms and costs ~CA$2/month
- static1.squarespace.com adds 204ms and costs ~CA$2/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
assets.squarespace.com takes 4768ms 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 919ms 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
assets.squarespace.com takes 815ms 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
58% 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
assets.squarespace.com takes 532ms 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.thisispaperroute.com takes 397ms 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.gstatic.com takes 247ms 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
static1.squarespace.com takes 204ms 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
58% 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
53% of definitions.sqspcdn.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
98% 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 Optimization7 images, 861 KB total, 5 KB wastedINFO
Image Optimization Audit
Total Images
7
Total Size
861 KB
Oversized
1
Wasted
5 KB