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.
1.10 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.08 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.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.27 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.
2.08 s
Page Load Progression
375 ms 750 ms 1.1 s 1.5 s 1.9 s 2.2 s 2.6 s 3.0 sFPage Weight BudgetAction5.4 MB transferred, 102 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
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 BundlesAction36 scripts, 605 KB 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/jssurvey.js | 386 KB | 285 KB (74%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VD37XK5DBV&cx=c>m=4e64k1h1 | 174 KB | 65 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1038753595&cx=c>m=4e64k1h1 | 145 KB | 64 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HL6QKWG5V6&cx=c>m=4e64k1 | 151 KB | 64 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-4445139&cx=c>m=4e64k1h1 | 129 KB | 59 KB (46%) | ✓ | 3rd |
| https://try.abtasty.com/d3ee30fb9a165fb849a81ac281ba8ba1/main.41250dcc091c90490d13.js | 52 KB | 23 KB (45%) | ✓ | 3rd |
| https://try.abtasty.com/d3ee30fb9a165fb849a81ac281ba8ba1/main.41250dcc091c90490d13.js | 0 KB | 23 KB (45%) | ✓ | 3rd |
| https://www.habitat.org/sites/default/files/js/js_2znM313CFruTSR73pA5c1wPoSwOCf5uGPzT95eLvyGw.js?scope=footer&delta=1&language=en-003&theme=hab_theme&include=eJxdkOEOwiAMhF9ojD--D-mgA0xplXVR3946jUH_QO_LhesRpaOvrNgZaD5fd-yPeZXepiySCYNC9tmOfz3DGe5TOZWgBRt6WJzipgOJYs-yOqo_eCUBg7AgjVTEdhhAkwTkosJUYAnQEQKmqlXYv4T7CNdt6Bj1sEVpF2EL_Ql3DXgHOhxbQbIgxVjCWl-jf19OJVu_w_TX6EuSMOhoSV0uSW7sGvI-8IKQrM1WFW81YQCySPvmqk-Xg4xT | 30 KB | 21 KB (70%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-92354329-1 | 116 KB | — | ✓ | 3rd |
| https://try.abtasty.com/shared/me.56490845629cd5ac3849.js | 0 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 InventoryAction102 resources · 5.4 MB · 605 KB savings availableFIX
~605.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 102 resources | 5.4 MiB | ||||||
BImage Optimization31 images, 0 KB saveableREVIEW
BJS Execution Cost671ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.habitat.org/emea | 187ms | 3ms | 0ms | 3rd |
| Unattributable | 102ms | 5ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VD37XK5DBV&cx=c>m=4e64k1h1 | 98ms | 88ms | 9ms | 3rd |
| https://www.surveygizmo.com/2026.04.20.00/runtimejs/dist/survey/js/jssurvey.js | 90ms | 57ms | 26ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NXHV9Q8 | 73ms | 60ms | 11ms | 3rd |
| https://try.abtasty.com/d3ee30fb9a165fb849a81ac281ba8ba1/main.41250dcc091c90490d13.js | 65ms | 56ms | 9ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-92354329-1 | 56ms | 46ms | 7ms | 3rd |
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 HintsNo optimization neededPASS
AHTTP Cachingmax-age=31536000 (52 weeks)PASS
max-age=31536000
| Directive | Value | Meaning |
|---|---|---|
| max-age | 31536000 | Cache for 52 weeks |
Network Waterfall102 requests over 2204msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.habitat.org www.habitat.org | Other | 187ms | 23 KB | — | $2/mo | Optional |
Unattributable Unattributable | Other | 102ms | 0 KB | — | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 98ms | 174 KB | 37% | $1/mo | Optional |
www.surveygizmo.com www.surveygizmo.com | Other | 90ms | 386 KB | 74% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 73ms | 189 KB | — | $1/mo | Optional |
try.abtasty.com try.abtasty.com | Other | 65ms | 0 KB | 45% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 56ms | 116 KB | — | $1/mo | Optional |
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
74% 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