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.
6.10 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.97 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
242 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.
7.69 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.
14.80 s
Page Load Progression
FPage Weight BudgetAction2.6 MB transferred, 124 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2906ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.wikiwand.com/ | 799ms | 60ms | 5ms | 3rd |
| https://www.wikiwand.com/_astro/client.D9AtoyGe.js | 798ms | 617ms | 3ms | 3rd |
| Unattributable | 372ms | 22ms | 0ms | 3rd |
| https://www.wikiwand.com/_astro/proxy.BEn9hdpx.js | 295ms | 99ms | 0ms | 3rd |
| https://www.wikiwand.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 224ms | 217ms | 2ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-WY2VW99VN8 | 211ms | 167ms | 28ms | 3rd |
| https://www.paypal.com/sdk/js?client-id=AUafUZX5DaqEjpo8U6AR2AuvsFE2xpIARP_rImMyWGYxxZ1x3lUudAFdctWDdalwogEu4GmvNMq2nVBU&vault=true&intent=subscription¤cy=USD | 207ms | 143ms | 34ms | 3rd |
DPage Weight InventoryAction124 resources · 2.6 MB · 233 KB savings availableFIX
~233.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 124 resources | 2.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization22 images, 0 KB saveableREVIEW
CJS BundlesAction56 scripts, 233 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-WY2VW99VN8 | 149 KB | 62 KB (42%) | ✓ | 3rd |
| https://www.paypal.com/sdk/js?client-id=AUafUZX5DaqEjpo8U6AR2AuvsFE2xpIARP_rImMyWGYxxZ1x3lUudAFdctWDdalwogEu4GmvNMq2nVBU&vault=true&intent=subscription¤cy=USD | 97 KB | 42 KB (45%) | ✓ | 3rd |
| https://www.paypal.com/sdk/js?client-id=AUafUZX5DaqEjpo8U6AR2AuvsFE2xpIARP_rImMyWGYxxZ1x3lUudAFdctWDdalwogEu4GmvNMq2nVBU&vault=true&intent=subscription¤cy=USD | 97 KB | 42 KB (45%) | ✓ | 3rd |
| https://www.paypal.com/sdk/js?client-id=AUafUZX5DaqEjpo8U6AR2AuvsFE2xpIARP_rImMyWGYxxZ1x3lUudAFdctWDdalwogEu4GmvNMq2nVBU&vault=true&intent=subscription¤cy=USD | 0 KB | 42 KB (45%) | ✓ | 3rd |
| https://www.wikiwand.com/_astro/proxy.BEn9hdpx.js | 41 KB | 23 KB (56%) | ✓ | 3rd |
| https://www.wikiwand.com/_astro/client.D9AtoyGe.js | 57 KB | 22 KB (38%) | ✓ | 3rd |
| https://www.wikiwand.com/_astro/index.module.kFwNn9Y4.js | 1 KB | — | ✓ | 3rd |
| https://www.wikiwand.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? | 14 KB | — | ✓ | 3rd |
| https://www.wikiwand.com/_astro/HeroTitle.C8rWT2KW.js | 4 KB | — | ✓ | 3rd |
| https://www.wikiwand.com/_astro/HeroSearch.B7cRv-mI.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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading15 fonts (756 KB)PASS
Web fonts
15
756 KB total
Render-blocking
0
of 15
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 ~174 KB and ~348 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
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 Waterfall124 requests over 2600msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.wikiwand.com www.wikiwand.com | Other | 799ms | 17 KB | — | $11/mo | Costly |
www.wikiwand.com www.wikiwand.com | Other | 798ms | 57 KB | 38% | $11/mo | Costly |
Unattributable Unattributable | Other | 372ms | 0 KB | — | $5/mo | Costly |
www.wikiwand.com www.wikiwand.com | Other | 295ms | 41 KB | 56% | $4/mo | Costly |
www.wikiwand.com www.wikiwand.com | Other | 224ms | 0 KB | — | $3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 211ms | 149 KB | 42% | $3/mo | Costly |
PayPal www.paypal.com | Payment | 207ms | 0 KB | 45% | $3/mo | Essential |
These scripts may cost more than they're worth
- www.wikiwand.com adds 799ms and costs ~$11/month
- www.wikiwand.com adds 798ms and costs ~$11/month
- Unattributable adds 372ms and costs ~$5/month
- www.wikiwand.com adds 295ms and costs ~$4/month
- www.wikiwand.com adds 224ms and costs ~$3/month
- Google Tag Manager adds 211ms and costs ~$3/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
www.wikiwand.com takes 799ms 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.wikiwand.com takes 798ms 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 372ms 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.wikiwand.com takes 295ms 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 www.wikiwand.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.wikiwand.com takes 224ms 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 211ms 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