Performance
· 26 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.
4.60 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.85 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
620 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
2.392
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
7.44 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.
14.49 s
Page Load Progression
DPage Weight BudgetAction2.1 MB transferred, 99 requestsFIX
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4020ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://kosmos-prod.react.gammacdn.com/react-18-2-0-prod.js | 1523ms | 1368ms | 1ms | 3rd |
| https://kosmos-prod.react.gammacdn.com/app.modern.a889b6befa0c681f1cad.js | 689ms | 425ms | 126ms | 3rd |
| Unattributable | 497ms | 51ms | 0ms | 1st |
| https://www.dogfartnetwork.com/sfw | 301ms | 3ms | 0ms | 3rd |
| https://www.dogfartnetwork.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js | 263ms | 94ms | 7ms | 3rd |
| https://kosmos-prod.react.gammacdn.com/ajv.modern.3afc253087ca56500cf8.js | 208ms | 189ms | 8ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7H2D55Y8J2&cx=c>m=4e67e0h1 | 202ms | 161ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NLP9VR8 | 151ms | 124ms | 25ms | 3rd |
| https://cdn.izooto.com/scripts/sdk/main.js | 123ms | 87ms | 28ms | 3rd |
| https://kosmos-prod.react.gammacdn.com/lodash-4-17-2.js | 62ms | 48ms | 5ms | 3rd |
DJS BundlesAction22 scripts, 448 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://kosmos-prod.react.gammacdn.com/app.modern.a889b6befa0c681f1cad.js | 424 KB | 229 KB (54%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7H2D55Y8J2&cx=c>m=4e67e0h1 | 161 KB | 68 KB (43%) | ✓ | 3rd |
| https://cdn.izooto.com/scripts/sdk/main.js | 96 KB | 68 KB (70%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NLP9VR8 | 122 KB | 60 KB (49%) | ✓ | 3rd |
| https://static01-cms-fame.gammacdn.com/c/minify/ef/652f6ded6d17bd73dd9a550aa6c5d4.js | 34 KB | 23 KB (71%) | ✓ | 3rd |
| https://kosmos-prod.react.gammacdn.com/react-18-2-0-prod.js | 5 KB | — | ✓ | 3rd |
| https://kosmos-prod.react.gammacdn.com/component-MediaSlider.modern.8cf27141111615adac4c.js | 2 KB | — | ✓ | 3rd |
| https://www.dogfartnetwork.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js | 4 KB | — | ✓ | 3rd |
| https://kosmos-prod.react.gammacdn.com/ajv.modern.3afc253087ca56500cf8.js | 33 KB | — | ✓ | 3rd |
| https://kosmos-prod.react.gammacdn.com/legal-client.modern.9a29259d58b342b57caa.js | 2 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 InventoryAction99 resources · 2.1 MB · 448 KB savings availableFIX
~447.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 99 resources | 2.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction37 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.
Performance issues directly impact user engagement and conversion rates.
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (299 KB)PASS
Web fonts
3
299 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
- 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 ~102 KB and ~204 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints17 hints, 0 missing preconnectsPASS
Current Resource Hints
17 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues 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 Waterfall99 requests over 4906msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
kosmos-prod.react.gammacdn.com kosmos-prod.react.gammacdn.com | Other | 1523ms | 5 KB | — | $20/mo | Costly |
kosmos-prod.react.gammacdn.com kosmos-prod.react.gammacdn.com | Other | 689ms | 424 KB | 54% | $9/mo | Costly |
www.dogfartnetwork.com www.dogfartnetwork.com | Other | 301ms | 16 KB | — | $4/mo | Costly |
www.dogfartnetwork.com www.dogfartnetwork.com | Other | 263ms | 4 KB | — | $3/mo | Costly |
kosmos-prod.react.gammacdn.com kosmos-prod.react.gammacdn.com | Other | 208ms | 33 KB | — | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 202ms | 161 KB | 43% | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 151ms | 122 KB | 49% | $2/mo | Optional |
cdn.izooto.com cdn.izooto.com | Other | 123ms | 96 KB | 70% | $2/mo | Optional |
kosmos-prod.react.gammacdn.com kosmos-prod.react.gammacdn.com | Other | 62ms | 26 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- kosmos-prod.react.gammacdn.com adds 1523ms and costs ~$20/month
- kosmos-prod.react.gammacdn.com adds 689ms and costs ~$9/month
- www.dogfartnetwork.com adds 301ms and costs ~$4/month
- www.dogfartnetwork.com adds 263ms and costs ~$3/month
- kosmos-prod.react.gammacdn.com adds 208ms and costs ~$3/month
- Google Tag Manager adds 202ms and costs ~$3/month
88% 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
kosmos-prod.react.gammacdn.com takes 1523ms 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
kosmos-prod.react.gammacdn.com takes 689ms 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
54% of kosmos-prod.react.gammacdn.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
www.dogfartnetwork.com takes 301ms 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.dogfartnetwork.com takes 263ms 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
kosmos-prod.react.gammacdn.com takes 208ms 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
70% of cdn.izooto.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
Image Optimization35 images, 0 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
35
Total Size
0 KB
Oversized
5