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.
1.44 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.48 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.71 s
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.
1.86 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.
9.16 s
Page Load Progression
FPage Weight BudgetAction3.0 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
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction8016ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 6155ms | 5827ms | 0ms | 3rd |
| https://www.slideshare.net/ | 890ms | 6ms | 1ms | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/04d3zt02mmpb~.js | 333ms | 262ms | 10ms | 3rd |
| https://cmp.osano.com/AzZdHGSGtpxCq1Cpt/079b27eb-bb3f-48dd-9bd9-3feb8aec3c38/osano.js | 268ms | 240ms | 13ms | 3rd |
| https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.8.js | 139ms | 115ms | 22ms | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/turbopack-05x3utm0-y735.js | 90ms | 89ms | 0ms | 3rd |
| https://www.slideshare.net/_fs-ch-1T1wmsGaOgGaSxcX/challenge.js | 78ms | 58ms | 16ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-M36RG8PT | 63ms | 50ms | 12ms | 3rd |
FJS BundlesAction46 scripts, 547 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.slideshare.net/_fs-ch-1T1wmsGaOgGaSxcX/challenge.js | 472 KB | 225 KB (48%) | ✓ | 3rd |
| https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.8.js | 161 KB | 77 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-M36RG8PT | 133 KB | 70 KB (53%) | ✓ | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/09wz4llpt3kxh.js | 61 KB | 61 KB (100%) | ✓ | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/04d3zt02mmpb~.js | 99 KB | 26 KB (38%) | ✓ | 3rd |
| https://www.slideshare.net/_fs-ch-1T1wmsGaOgGaSxcX/assets/script.js | 205 KB | 24 KB (12%) | ✓ | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/0z70oiv4vmk~2.js | 26 KB | 23 KB (90%) | ✓ | 3rd |
| https://cmp.osano.com/AzZdHGSGtpxCq1Cpt/079b27eb-bb3f-48dd-9bd9-3feb8aec3c38/osano.js | 89 KB | 21 KB (23%) | ✓ | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/0u4lbad~7fh2b.js | 21 KB | 20 KB (99%) | ✓ | 3rd |
| https://public.slidesharecdn.com/_next/static/chunks/turbopack-08eg5r1bqsqcp.js | 5 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 · 3.0 MB · 547 KB savings availableFIX
~547.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 99 resources | 3.0 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
private, no-store
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-store | — | Never cache this response |
CImage OptimizationAction27 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
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
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
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (182 KB)PASS
Web fonts
3
182 KB total
Render-blocking
0
of 3
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
Network Waterfall99 requests over 8801msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 6155ms | 0 KB | — | €98/mo | Costly |
www.slideshare.net www.slideshare.net | Other | 890ms | 108 KB | — | €14/mo | Costly |
public.slidesharecdn.com public.slidesharecdn.com | Other | 333ms | 99 KB | 38% | €5/mo | Costly |
cmp.osano.com cmp.osano.com | Other | 268ms | 89 KB | 23% | €4/mo | Costly |
surveys-static-prd.survicate-cdn.com surveys-static-prd.survicate-cdn.com | Other | 139ms | 161 KB | 48% | €2/mo | Optional |
public.slidesharecdn.com public.slidesharecdn.com | Other | 90ms | 5 KB | — | €1/mo | Optional |
www.slideshare.net www.slideshare.net | Other | 78ms | 472 KB | 48% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 63ms | 133 KB | 53% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 6155ms and costs ~€98/month
- www.slideshare.net adds 890ms and costs ~€14/month
- public.slidesharecdn.com adds 333ms and costs ~€5/month
- cmp.osano.com adds 268ms 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 6155ms 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.slideshare.net takes 890ms 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
public.slidesharecdn.com takes 333ms 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
cmp.osano.com takes 268ms 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
53% 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