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.
1.63 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
52 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.004
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.63 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.
3.01 s
Page Load Progression
467 ms
935 ms
1.4 s
1.9 s
2.3 s
2.8 s
3.3 s
3.7 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization26 images, 0 KB saveableREVIEW
CJS Execution CostAction1033ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ixdf.org/ | 352ms | 8ms | 3ms | 3rd |
| Unattributable | 194ms | 11ms | 0ms | 3rd |
| https://t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c>m=4e64k0 | 192ms | 172ms | 15ms | 3rd |
| https://assets.interaction-design.org/build/assets/bugsnag-1RJHgweM.js | 179ms | 48ms | 0ms | 3rd |
| https://t.ixdf.org/gtm.js?id=GTM-KJ8XGB | 116ms | 100ms | 15ms | 3rd |
BJS Bundles46 scripts, 119 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c>m=4e64k0 | 171 KB | 60 KB (35%) | ✓ | 3rd |
| https://t.ixdf.org/gtm.js?id=GTM-KJ8XGB | 156 KB | 59 KB (38%) | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/course-DfCRK5qh.js | 1 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/button-DU36gPX9.js | 2 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/notification-f2Rm4oS7.js | 2 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/spinner--AwVl_E8.js | 1 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/auth-S67ULf_r.js | 1 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/cookie-RmvTIN1d.js | 1 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/smoothAnchor-Bdh_NRTq.js | 1 KB | — | ✓ | 3rd |
| https://assets.interaction-design.org/build/assets/cssVariables-Bz9wRQEm.js | 1 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
APage Weight Budget1006 KB transferred, 86 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (43 KB)PASS
Web fonts
2
43 KB total
Render-blocking
0
of 2
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 HintsNo optimization neededPASS
APage Weight Inventory86 resources · 1006 KB · 119 KB savings availablePASS
~118.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 86 resources | 1005.9 KiB | ||||||
Network Waterfall86 requests over 1441msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
ixdf.org ixdf.org | Other | 352ms | 29 KB | — | $5/mo | Costly |
Unattributable Unattributable | Other | 194ms | 0 KB | — | $3/mo | Optional |
t.ixdf.org t.ixdf.org | Other | 192ms | 171 KB | 35% | $3/mo | Optional |
assets.interaction-design.org assets.interaction-design.org | Other | 179ms | 16 KB | — | $2/mo | Optional |
t.ixdf.org t.ixdf.org | Other | 116ms | 156 KB | 38% | $2/mo | Optional |
These scripts may cost more than they're worth
- ixdf.org adds 352ms and costs ~$5/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
ixdf.org takes 352ms 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