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.
6.24 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
10.46 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
617 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.008
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.84 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.
10.53 s
Page Load Progression
613 ms 1.2 s 1.8 s 2.5 s
3.1 s 3.7 s
4.3 s
4.9 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction3971ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 851ms | 53ms | 0ms | 3rd |
| https://ixdf.org/ | 820ms | 54ms | 7ms | 3rd |
| https://t.ixdf.org/gtag/js?id=G-WP2YP70Z2X&cx=c>m=4e64k0 | 790ms | 712ms | 61ms | 3rd |
| https://t.ixdf.org/gtm.js?id=GTM-KJ8XGB | 487ms | 382ms | 56ms | 3rd |
| https://assets.interaction-design.org/build/assets/bugsnag-1RJHgweM.js | 427ms | 147ms | 0ms | 3rd |
| https://assets.interaction-design.org/build/assets/app-CGlU-aIG.js | 321ms | 64ms | 0ms | 3rd |
| https://assets.interaction-design.org/build/assets/staggerRevealer-D9U4066z.js | 110ms | 7ms | 1ms | 3rd |
| https://assets.interaction-design.org/build/assets/tailwind-DxFDGO_n.css | 89ms | 0ms | 0ms | 3rd |
| https://assets.interaction-design.org/build/assets/typed.module-D-osZxX8.js | 75ms | 60ms | 0ms | 3rd |
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization24 images, 0 KB saveableREVIEW
BJS Bundles46 scripts, 118 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 Budget920 KB transferred, 83 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (20 KB)PASS
Web fonts
1
20 KB total
Render-blocking
0
of 1
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
APage Weight Inventory83 resources · 920 KB · 118 KB savings availablePASS
~118.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 83 resources | 920.3 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall83 requests over 2665msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 851ms | 0 KB | — | $11/mo | Costly |
ixdf.org ixdf.org | Other | 820ms | 29 KB | — | $11/mo | Costly |
t.ixdf.org t.ixdf.org | Other | 790ms | 171 KB | 35% | $10/mo | Costly |
t.ixdf.org t.ixdf.org | Other | 487ms | 156 KB | 38% | $6/mo | Costly |
assets.interaction-design.org assets.interaction-design.org | Other | 427ms | 16 KB | — | $6/mo | Costly |
assets.interaction-design.org assets.interaction-design.org | Other | 321ms | 10 KB | — | $4/mo | Costly |
assets.interaction-design.org assets.interaction-design.org | Other | 110ms | 2 KB | — | $1/mo | Optional |
assets.interaction-design.org assets.interaction-design.org | Other | 89ms | 53 KB | — | $1/mo | Optional |
assets.interaction-design.org assets.interaction-design.org | Other | 75ms | 3 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 851ms and costs ~$11/month
- ixdf.org adds 820ms and costs ~$11/month
- t.ixdf.org adds 790ms and costs ~$10/month
- t.ixdf.org adds 487ms and costs ~$6/month
- assets.interaction-design.org adds 427ms and costs ~$6/month
- assets.interaction-design.org adds 321ms and costs ~$4/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
Unattributable takes 851ms 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
ixdf.org takes 820ms 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
t.ixdf.org takes 790ms 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
t.ixdf.org takes 487ms 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.interaction-design.org takes 427ms 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.interaction-design.org takes 321ms 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