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.
7.89 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
17.13 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
931 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.89 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.
17.31 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4534ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.prod.website-files.com/gsap/3.15.0/gsap.min.js | 554ms | 145ms | 6ms | 3rd |
| Unattributable | 401ms | 17ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KJQCH7P | 381ms | 324ms | 45ms | 3rd |
| https://cdn.prod.website-files.com/gsap/3.15.0/ScrollTrigger.min.js | 351ms | 42ms | 5ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-959285871&cx=c>m=4e64h1 | 350ms | 310ms | 36ms | 3rd |
| https://www.teachable.com/ | 336ms | 148ms | 20ms | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 302ms | 269ms | 14ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6E9Q4KD1X0&cx=c>m=4e64h1 | 202ms | 157ms | 44ms | 3rd |
| https://cdn.jsdelivr.net/npm/swiper@12/swiper-bundle.min.js | 178ms | 66ms | 17ms | 3rd |
| https://cdn.prod.website-files.com/687904fb2b26c434698c47e9/js/fs-teachable.achunk.55097dd682aead29.js | 174ms | 152ms | 14ms | 3rd |
Showing top 10 of 23 scripts
DJS BundlesAction43 scripts, 428 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://script.crazyegg.com/scripts/addons/1.0.146/survey.js | 100 KB | 74 KB (77%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6E9Q4KD1X0&cx=c>m=4e64h1 | 171 KB | 68 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-959285871&cx=c>m=4e64h1 | 145 KB | 64 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KJQCH7P | 173 KB | 64 KB (37%) | ✓ | 3rd |
| https://cdn.intellimize.co/snippet/117475503.js | 87 KB | 60 KB (69%) | ✓ | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 55 KB | 27 KB (48%) | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/swiper@12/swiper-bundle.min.js | 44 KB | 25 KB (58%) | ✓ | 3rd |
| https://cdn.flowblock.co/public/files/68e91c7073e805ab57462f0c/gsap.js | 47 KB | 24 KB (52%) | ✓ | 3rd |
| https://cdn.heapanalytics.com/js/heap-318805607.js | 41 KB | 23 KB (56%) | ✓ | 3rd |
| https://cdn.prod.website-files.com/687904fb2b26c434698c47e9/js/fs-teachable.achunk.5959ac50b3c857f1.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
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 InventoryAction81 resources · 2.0 MB · 428 KB savings availableFIX
~428.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 81 resources | 2.0 MiB | ||||||
CPage Weight BudgetAction2.0 MB transferred, 81 requestsREVIEW
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
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
BImage Optimization11 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP CachingprivateREVIEW
private
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (357 KB)PASS
Web fonts
3
357 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~85 KB and ~170 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints5 hints, 0 missing preconnectsPASS
Current Resource Hints
5 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall81 requests over 2538msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 554ms | 29 KB | — | €6/mo | Costly |
Unattributable Unattributable | Other | 401ms | 0 KB | — | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 381ms | 173 KB | 37% | €4/mo | Costly |
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 351ms | 18 KB | — | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 350ms | 145 KB | 44% | €4/mo | Costly |
www.teachable.com www.teachable.com | Other | 336ms | 39 KB | — | €4/mo | Costly |
script.crazyegg.com script.crazyegg.com | Other | 302ms | 55 KB | 48% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 202ms | 171 KB | 40% | €2/mo | Costly |
jsDelivr cdn.jsdelivr.net | CDN | 178ms | 44 KB | 58% | €2/mo | Optional |
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 174ms | 12 KB | — | €2/mo | Optional |
cdn.flowblock.co cdn.flowblock.co | Other | 169ms | 47 KB | 52% | €2/mo | Optional |
Heap Analytics cdn.heapanalytics.com | Analytics | 146ms | 41 KB | 56% | €2/mo | Optional |
cdn.intellimize.co cdn.intellimize.co | Other | 136ms | 87 KB | 69% | €1/mo | Optional |
cdn.flowblock.co cdn.flowblock.co | Other | 117ms | 1 KB | — | €1/mo | Optional |
script.crazyegg.com script.crazyegg.com | Other | 115ms | 85 KB | — | €1/mo | Optional |
cdn.flowblock.co cdn.flowblock.co | Other | 99ms | 1 KB | — | €1/mo | Optional |
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 96ms | 14 KB | — | €1/mo | Optional |
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 86ms | 1 KB | — | €1/mo | Optional |
script.crazyegg.com script.crazyegg.com | Other | 80ms | 100 KB | 77% | €1/mo | Optional |
script.crazyegg.com script.crazyegg.com | Other | 72ms | 23 KB | — | €1/mo | Optional |
static.auth.hotmart.com static.auth.hotmart.com | Other | 69ms | 28 KB | — | €1/mo | Optional |
d3e54v103j8qbb.cloudfront.net d3e54v103j8qbb.cloudfront.net | Other | 60ms | 30 KB | — | €1/mo | Optional |
cdn.prod.website-files.com cdn.prod.website-files.com | Other | 60ms | 23 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- cdn.prod.website-files.com adds 554ms and costs ~€6/month
- Unattributable adds 401ms and costs ~€4/month
- Google Tag Manager adds 381ms and costs ~€4/month
- cdn.prod.website-files.com adds 351ms and costs ~€4/month
- Google Tag Manager adds 350ms and costs ~€4/month
- www.teachable.com adds 336ms and costs ~€4/month
- script.crazyegg.com adds 302ms and costs ~€3/month
- Google Tag Manager adds 202ms and costs ~€2/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
cdn.prod.website-files.com takes 554ms 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 401ms 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 381ms 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
cdn.prod.website-files.com takes 351ms 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 350ms 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.teachable.com takes 336ms 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
script.crazyegg.com takes 302ms 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 202ms 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
58% of jsDelivr'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
52% of cdn.flowblock.co'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
56% of Heap Analytics'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
69% of cdn.intellimize.co'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
77% of script.crazyegg.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