Performance
· 17 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.
4.24 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
17.79 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
964 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.148
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.78 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.
20.68 s
Page Load Progression
FPage Weight BudgetAction3.9 MB transferred, 93 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5055ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-NXHV9Q8 | 846ms | 643ms | 177ms | 3rd |
| Unattributable | 742ms | 6ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HL6QKWG5V6&cx=c>m=4e64k1 | 635ms | 511ms | 119ms | 3rd |
| https://www.habitat.org/emea | 565ms | 7ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VD37XK5DBV&cx=c>m=4e64k1 | 483ms | 339ms | 142ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1038753595&cx=c>m=4e64k1 | 359ms | 216ms | 113ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-92354329-1 | 322ms | 221ms | 93ms | 3rd |
| https://try.abtasty.com/d3ee30fb9a165fb849a81ac281ba8ba1/main.41250dcc091c90490d13.js | 286ms | 245ms | 40ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-4445139&cx=c>m=4e64k1 | 283ms | 183ms | 98ms | 3rd |
| https://www.surveygizmo.com/2026.04.20.00/runtimejs/dist/survey/js/surveymobile.js | 243ms | 144ms | 80ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction42 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.surveygizmo.com/2026.04.20.00/runtimejs/dist/survey/js/surveymobile.js | 296 KB | 233 KB (79%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-92354329-1&cx=c>m=4e64k1 | 115 KB | 90 KB (78%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NXHV9Q8 | 189 KB | 70 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NXHV9Q8 | 0 KB | 70 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VD37XK5DBV&cx=c>m=4e64k1 | 174 KB | 65 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VD37XK5DBV&cx=c>m=4e64k1 | 0 KB | 65 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1038753595&cx=c>m=4e64k1 | 0 KB | 65 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1038753595&cx=c>m=4e64k1 | 145 KB | 65 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-92354329-1 | 0 KB | 63 KB (55%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-92354329-1 | 116 KB | 63 KB (55%) | ✓ | 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 InventoryAction93 resources · 3.9 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 93 resources | 3.9 MiB | ||||||
BImage Optimization18 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 Loading7 fonts (99 KB)PASS
Web fonts
7
99 KB total
Render-blocking
0
of 7
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)
Fixing the unchecked items could save ~4 KB and ~8 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+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=31536000 (52 weeks)PASS
max-age=31536000
| Directive | Value | Meaning |
|---|---|---|
| max-age | 31536000 | Cache for 52 weeks |
Network Waterfall93 requests over 7096msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 846ms | 0 KB | 37% | $11/mo | Costly |
Unattributable Unattributable | Other | 742ms | 0 KB | — | $10/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 635ms | 0 KB | 42% | $8/mo | Costly |
www.habitat.org www.habitat.org | Other | 565ms | 23 KB | — | $8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 483ms | 0 KB | 37% | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 359ms | 0 KB | 44% | $5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 322ms | 0 KB | 55% | $4/mo | Costly |
try.abtasty.com try.abtasty.com | Other | 286ms | 0 KB | 47% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 283ms | 0 KB | 46% | $4/mo | Costly |
www.surveygizmo.com www.surveygizmo.com | Other | 243ms | 296 KB | 79% | $3/mo | Costly |
www.habitat.org www.habitat.org | Other | 86ms | 0 KB | — | $1/mo | Optional |
www.habitat.org www.habitat.org | Other | 72ms | 30 KB | — | $1/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 71ms | 0 KB | — | $1/mo | Optional |
www.habitat.org www.habitat.org | Other | 64ms | 16 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 846ms and costs ~$11/month
- Unattributable adds 742ms and costs ~$10/month
- Google Tag Manager adds 635ms and costs ~$8/month
- www.habitat.org adds 565ms and costs ~$8/month
- Google Tag Manager adds 483ms and costs ~$6/month
- Google Tag Manager adds 359ms and costs ~$5/month
- Google Tag Manager adds 322ms and costs ~$4/month
- try.abtasty.com adds 286ms and costs ~$4/month
- Google Tag Manager adds 283ms and costs ~$4/month
- www.surveygizmo.com adds 243ms and costs ~$3/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
Google Tag Manager takes 846ms 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 742ms 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 635ms 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.habitat.org takes 565ms 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 483ms 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 359ms 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 322ms 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
55% of Google Tag Manager'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
try.abtasty.com takes 286ms 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 283ms 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.surveygizmo.com takes 243ms 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
79% of www.surveygizmo.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