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.
1.46 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.65 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.147
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
16.70 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.
1.65 s
Page Load Progression
DThird-Party ImpactAction92% third-party, 0 ms blockingFIX
DJS Execution CostAction2302ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://acuityscheduling.com/ | 1782ms | 8ms | 2ms | 1st |
| Unattributable | 345ms | 10ms | 0ms | 3rd |
| https://www.datadoghq-browser-agent.com/us5/v5/datadog-rum.js | 99ms | 80ms | 7ms | 3rd |
| https://www.datadoghq-browser-agent.com/us5/v5/datadog-logs.js | 77ms | 72ms | 1ms | 3rd |
DPage Weight InventoryAction96 resources · 1.6 MB · 160 KB savings availableFIX
~160.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 96 resources | 1.6 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store, no-cache, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| no-cache | — | Cache but always revalidate first |
| must-revalidate | — | Must recheck with server after expiry |
CPage Weight BudgetAction1.6 MB transferred, 96 requestsREVIEW
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
CImage OptimizationAction74 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
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
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
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
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
CJS BundlesAction9 scripts, 160 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-5G77WWT | 161 KB | 83 KB (52%) | ✓ | 3rd |
| https://www.datadoghq-browser-agent.com/us5/v5/datadog-rum.js | 55 KB | 32 KB (59%) | ✓ | 3rd |
| https://cdn-marketing.acuityscheduling.com/js/marketing.bundle.js?v=2673d6dc83c8476a61aef93a302a69603aca19d6 | 61 KB | 25 KB (41%) | ✓ | 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 | 13 KB | — | ✓ | 3rd |
| https://cdn-marketing.acuityscheduling.com/js/marketing-frontsite.min.js?v=2673d6dc83c8476a61aef93a302a69603aca19d6 | 11 KB | — | ✓ | 3rd |
| https://www.datadoghq-browser-agent.com/us5/v5/datadog-logs.js | 20 KB | — | ✓ | 3rd |
| https://acuityscheduling.com/js/dropdown.js | 1 KB | — | ✓ | 1st |
| https://cdn.amplitude.com/libs/amplitude-8.9.0-min.gz.js | 23 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
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 (322 KB)PASS
Web fonts
6
322 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 Waterfall96 requests over 38192msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 345ms | 0 KB | — | €4/mo | Costly |
www.datadoghq-browser-agent.com www.datadoghq-browser-agent.com | Other | 99ms | 55 KB | 59% | €1/mo | Optional |
www.datadoghq-browser-agent.com www.datadoghq-browser-agent.com | Other | 77ms | 20 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 345ms and costs ~€4/month
Unattributable takes 345ms 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
59% of www.datadoghq-browser-agent.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