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.
4.85 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
15.48 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
758 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.
6.64 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.
15.62 s
Page Load Progression
FPage Weight BudgetAction4.1 MB transferred, 86 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
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
FJS Execution CostAction3596ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://kubiobuilder.com/ | 1158ms | 14ms | 1ms | 1st |
| Unattributable | 618ms | 12ms | 0ms | 3rd |
| https://kubiobuilder.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js | 500ms | 346ms | 11ms | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-5S97VL8 | 397ms | 358ms | 35ms | 3rd |
| https://cdn.matomo.cloud/kubiobuilder.matomo.cloud/container_pIUHfj21.js | 393ms | 362ms | 20ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-212787703-1&cx=c>m=4e64k0h2 | 127ms | 101ms | 25ms | 3rd |
| https://beacon-v2.helpscout.net/static/js/main.c8916e6f.js | 121ms | 109ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-6FS4CWQBES | 115ms | 66ms | 46ms | 3rd |
| https://kubiobuilder.com/wp-content/cache/autoptimize/js/autoptimize_78051c7eaf61be492bc19fe092d21102.js | 92ms | 47ms | 25ms | 1st |
| https://www.google-analytics.com/analytics.js | 75ms | 51ms | 17ms | 3rd |
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction41 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CJS BundlesAction18 scripts, 278 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-6FS4CWQBES | 173 KB | 66 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5S97VL8 | 156 KB | 66 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-212787703-1&cx=c>m=4e64k0h2 | 116 KB | 65 KB (56%) | ✓ | 3rd |
| https://kubiobuilder.com/wp-content/cache/autoptimize/js/autoptimize_78051c7eaf61be492bc19fe092d21102.js | 92 KB | 52 KB (57%) | ✓ | 1st |
| https://cdn.matomo.cloud/kubiobuilder.matomo.cloud/container_pIUHfj21.js | 68 KB | 29 KB (43%) | ✓ | 3rd |
| https://extendstudio.postaffiliatepro.com/scripts/63roaw?accountId=22ba8b64&url=S_kubiobuilder.com%2F&referrer=&isInIframe=false&getParams=&anchor= | 0 KB | — | ✓ | 3rd |
| https://extendstudio.postaffiliatepro.com/scripts/63joaw | 5 KB | — | ✓ | 3rd |
| https://kubiobuilder.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 31 KB | — | ✓ | 1st |
| https://kubiobuilder.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js | 4 KB | — | ✓ | 1st |
| https://sbl.onfastspring.com/sbl/0.9.4/fastspring-builder.min.js | 12 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
CPage Weight InventoryAction86 resources · 4.1 MB · 278 KB savings availableREVIEW
~278.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 86 resources | 4.1 MiB | ||||||
A+Third-Party Impact15% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (348 KB)PASS
Web fonts
6
348 KB total
Render-blocking
0
of 6
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 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
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall86 requests over 4500msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 618ms | 0 KB | — | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 397ms | 156 KB | 42% | $2/mo | Costly |
Matomo cdn.matomo.cloud | Analytics | 393ms | 68 KB | 43% | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 127ms | 116 KB | 56% | $1/mo | Optional |
beacon-v2.helpscout.net beacon-v2.helpscout.net | Other | 121ms | 13 KB | — | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 115ms | 173 KB | 38% | $1/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 75ms | 21 KB | — | $0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 618ms and costs ~$4/month
- Google Tag Manager adds 397ms and costs ~$2/month
- Matomo adds 393ms and costs ~$2/month
51% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 618ms 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 397ms 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
Matomo takes 393ms 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
56% 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