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.
8.77 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.39 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
832 ms
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.
8.92 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.
16.63 s
Page Load Progression
FPage Weight BudgetAction2.7 MB transferred, 68 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction3256ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://assets.squarespace.com/universal/scripts-compressed/common-6a459dad7444b31d-min.en-US.js | 832ms | 655ms | 76ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/10433-f7fe72faea365c96-min.en-US.js | 430ms | 174ms | 2ms | 3rd |
| https://www.heidcustomwoodworking.com/ | 384ms | 51ms | 28ms | 3rd |
| Unattributable | 381ms | 8ms | 0ms | 3rd |
| https://static1.squarespace.com/static/vta/5c5a519771c10ba3470d8101/scripts/site-bundle.24618f321442829cf50ddb341e64781c.js | 273ms | 196ms | 19ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/performance-c704c05d211c44da-min.en-US.js | 216ms | 22ms | 2ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/66796-9fe127d3a552e6ed-min.en-US.js | 181ms | 176ms | 4ms | 3rd |
| https://static1.squarespace.com/static/vta/5c5a519771c10ba3470d8101/scripts/section-divider.2cf999b0651cf5bf496a.js | 134ms | 31ms | 1ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/7041-ab5682cb407bceb3-min.en-US.js | 95ms | 65ms | 29ms | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/commerce-cd17439efa931e38-min.en-US.js | 91ms | 47ms | 44ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction37 scripts, 555 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://assets.squarespace.com/universal/scripts-compressed/common-6a459dad7444b31d-min.en-US.js | 274 KB | 176 KB (64%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/commerce-cd17439efa931e38-min.en-US.js | 188 KB | 154 KB (82%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/7041-ab5682cb407bceb3-min.en-US.js | 96 KB | 59 KB (82%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/common-vendors-a5542c2814272dd7-min.en-US.js | 168 KB | 59 KB (35%) | ✓ | 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 (58%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/37231-b90ed72cfa0f5072-min.en-US.js | 39 KB | 22 KB (58%) | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/73940-8020862563f92ddb-min.en-US.js | 4 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/99209-ed42d6036eafac89-min.en-US.js | 6 KB | — | ✓ | 3rd |
| https://assets.squarespace.com/universal/scripts-compressed/extract-css-runtime-efd5f2134e4e70f4-min.en-US.js | 17 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 InventoryAction68 resources · 2.7 MB · 555 KB savings availableFIX
~554.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 68 resources | 2.7 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
AImage Optimization10 images, 0 KB saveablePASS
A+Font Loading6 fonts (107 KB)PASS
Web fonts
6
107 KB total
Render-blocking
0
of 6
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 Hints4 hints, 0 missing preconnectsPASS
Current Resource Hints
4 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
A+JavaScript BlockingNo render-blocking JS or document.write usage detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
Network Waterfall68 requests over 2019msINFO
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 | 832ms | 274 KB | 64% | $5/mo | Costly |
assets.squarespace.com assets.squarespace.com | Other | 430ms | 11 KB | — | $2/mo | Costly |
www.heidcustomwoodworking.com www.heidcustomwoodworking.com | Other | 384ms | 165 KB | — | $2/mo | Costly |
Unattributable Unattributable | Other | 381ms | 0 KB | — | $2/mo | Costly |
static1.squarespace.com static1.squarespace.com | Other | 273ms | 37 KB | — | $2/mo | Costly |
assets.squarespace.com assets.squarespace.com | Other | 216ms | 9 KB | — | $1/mo | Costly |
assets.squarespace.com assets.squarespace.com | Other | 181ms | 17 KB | — | $1/mo | Optional |
static1.squarespace.com static1.squarespace.com | Other | 134ms | 3 KB | — | $1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 95ms | 96 KB | 82% | $1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 91ms | 188 KB | 82% | $1/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 80ms | 42 KB | — | $0/mo | Optional |
static1.squarespace.com static1.squarespace.com | Other | 56ms | 108 KB | — | $0/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 52ms | 44 KB | 98% | $0/mo | Optional |
assets.squarespace.com assets.squarespace.com | Other | 51ms | 168 KB | 35% | $0/mo | Optional |
These scripts may cost more than they're worth
- assets.squarespace.com adds 832ms and costs ~$5/month
- assets.squarespace.com adds 430ms and costs ~$2/month
- www.heidcustomwoodworking.com adds 384ms and costs ~$2/month
- Unattributable adds 381ms and costs ~$2/month
- static1.squarespace.com adds 273ms and costs ~$2/month
- assets.squarespace.com adds 216ms 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
assets.squarespace.com takes 832ms 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
64% 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 430ms 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.heidcustomwoodworking.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
Unattributable takes 381ms 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 273ms 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 216ms 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
82% 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
82% 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
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 Optimization119 images, 729 KB total, 267 KB wastedINFO
Image Optimization Audit
Total Images
119
Total Size
729 KB
Oversized
2
Wasted
267 KB