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.
819 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.46 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
96 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.006
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.41 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.
4.64 s
Page Load Progression
375 ms
750 ms
1.1 s 1.5 s 1.9 s 2.2 s 2.6 s 3.0 sFPage Weight BudgetAction2.8 MB transferred, 176 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
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 CostAction2204ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://static0.howtogeekimages.com/assets/valnet-footer.08dab0d7.js | 690ms | 75ms | 8ms | 3rd |
| https://www.howtogeek.com/ | 395ms | 39ms | 5ms | 3rd |
| https://d15kdpgjg3unno.cloudfront.net/oPS.js?cid=76 | 389ms | 382ms | 6ms | 3rd |
| Unattributable | 260ms | 36ms | 0ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 129ms | 92ms | 18ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-PVR2ZX9X91 | 87ms | 71ms | 16ms | 3rd |
| https://btloader.com/tag?o=5100917733457920&upapi=true | 70ms | 64ms | 3ms | 3rd |
| https://cdn.adsninja.ca/adsninja_client.js?v=3648 | 62ms | 24ms | 38ms | 3rd |
| https://cdn.privacy-mgmt.com/unified/4.40.1/usnat.f12613136193900e32e2.bundle.js | 61ms | 47ms | 12ms | 3rd |
| https://cdn.adsninja.ca/biddertypelibrary/live/HowToGeek/Prebid_Default.js?v=3648 | 60ms | 41ms | 17ms | 3rd |
FJS BundlesAction50 scripts, 1.0 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.adsninja.ca/adsninja_client.js?v=3648 | 317 KB | 274 KB (86%) | ✓ | 3rd |
| https://cdn.adsninja.ca/biddertypelibrary/live/HowToGeek/Prebid_Default.js?v=3648 | 197 KB | 160 KB (82%) | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/hls.js@latest | 160 KB | 145 KB (91%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 123 KB (66%) | ✓ | 3rd |
| https://imasdk.googleapis.com/js/sdkloader/ima3.js | 148 KB | 106 KB (72%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-PVR2ZX9X91 | 158 KB | 65 KB (41%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 58 KB (64%) | ✓ | 3rd |
| https://static0.howtogeekimages.com/assets/valnet-footer.08dab0d7.js | 64 KB | 49 KB (76%) | ✓ | 3rd |
| https://ats-wrapper.privacymanager.io/ats-modules/965715a0-f091-439e-a69e-257f7950b03c/ats.js | 75 KB | 38 KB (52%) | ✓ | 3rd |
| https://d15kdpgjg3unno.cloudfront.net/oPS.js?cid=76 | 60 KB | 25 KB (42%) | ✓ | 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 InventoryAction176 resources · 2.8 MB · 1.0 MB savings availableFIX
~1.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 176 resources | 2.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization45 images, 0 KB saveableREVIEW
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 Loading4 fonts (129 KB)PASS
Web fonts
4
129 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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 ~19 KB and ~38 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall176 requests over 4722msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
static0.howtogeekimages.com static0.howtogeekimages.com | Other | 690ms | 64 KB | 76% | €8/mo | Costly |
www.howtogeek.com www.howtogeek.com | Other | 395ms | 86 KB | — | €4/mo | Costly |
d15kdpgjg3unno.cloudfront.net d15kdpgjg3unno.cloudfront.net | Other | 389ms | 60 KB | 42% | €4/mo | Costly |
Unattributable Unattributable | Other | 260ms | 0 KB | — | €3/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 129ms | 188 KB | 66% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 87ms | 158 KB | 41% | €1/mo | Optional |
btloader.com btloader.com | Other | 70ms | 31 KB | — | €1/mo | Optional |
cdn.adsninja.ca cdn.adsninja.ca | Other | 62ms | 317 KB | 86% | €1/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 61ms | 42 KB | — | €1/mo | Optional |
cdn.adsninja.ca cdn.adsninja.ca | Other | 60ms | 197 KB | 82% | €1/mo | Optional |
These scripts may cost more than they're worth
- static0.howtogeekimages.com adds 690ms and costs ~€8/month
- www.howtogeek.com adds 395ms and costs ~€4/month
- d15kdpgjg3unno.cloudfront.net adds 389ms and costs ~€4/month
- Unattributable adds 260ms 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
static0.howtogeekimages.com takes 690ms 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
76% of static0.howtogeekimages.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.howtogeek.com takes 395ms 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
d15kdpgjg3unno.cloudfront.net takes 389ms 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 260ms 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
66% of securepubads.g.doubleclick.net'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
86% of cdn.adsninja.ca'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
82% of cdn.adsninja.ca'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