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.
2.07 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.38 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.17 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.636
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.25 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.
24.01 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 134 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
FJS Execution CostAction10895ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.businessinsider.com/ | 3412ms | 169ms | 39ms | 3rd |
| Unattributable | 1106ms | 245ms | 0ms | 3rd |
| https://www.businessinsider.com/scripts/main.f6eb5c9cd6b4e76438bf.js | 862ms | 562ms | 44ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 728ms | 657ms | 56ms | 3rd |
| https://micro.rubiconproject.com/prebid/dynamic/10306.js | 625ms | 535ms | 83ms | 3rd |
| https://cdn.confiant-integrations.net/video/202603241056/wrap.js | 446ms | 387ms | 32ms | 3rd |
| https://cdn.confiant-integrations.net/gptprebidnative/202603241056/wrap.js | 427ms | 386ms | 38ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MP6F46L | 388ms | 296ms | 46ms | 3rd |
| https://my.businessinsider.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 313ms | 284ms | 2ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-E21CV80ZCZ&cx=c>m=4e64e1 | 278ms | 243ms | 34ms | 3rd |
Showing top 10 of 26 scripts
FJS BundlesAction59 scripts, 789 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 186 KB | 127 KB (68%) | ✓ | 3rd |
| https://cdn.confiant-integrations.net/gptprebidnative/202603241056/wrap.js | 142 KB | 85 KB (60%) | ✓ | 3rd |
| https://micro.rubiconproject.com/prebid/dynamic/10306.js | 181 KB | 74 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MP6F46L | 162 KB | 71 KB (44%) | ✓ | 3rd |
| https://cdn.confiant-integrations.net/video/202603241056/wrap.js | 125 KB | 70 KB (56%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-E21CV80ZCZ&cx=c>m=4e64e1 | 148 KB | 62 KB (42%) | ✓ | 3rd |
| https://businessinsider.edge.permutive.app/3aba5292-ba75-422b-8715-bd21146f7836-web.js | 192 KB | 43 KB (22%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 38 KB (42%) | ✓ | 3rd |
| https://verticalvideo.businessinsider.com/vs.js?cid=8CU2241SO | 47 KB | 37 KB (80%) | ✓ | 3rd |
| https://www.businessinsider.com/scripts/main.f6eb5c9cd6b4e76438bf.js | 80 KB | 37 KB (46%) | ✓ | 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 InventoryAction134 resources · 2.5 MB · 789 KB savings availableFIX
~789.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 134 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization13 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 Loading3 fonts (28 KB)PASS
Web fonts
3
28 KB total
Render-blocking
0
of 3
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)
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
Network Waterfall134 requests over 6507msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.businessinsider.com www.businessinsider.com | Other | 3412ms | 74 KB | — | €14/mo | Costly |
Unattributable Unattributable | Other | 1106ms | 0 KB | — | €5/mo | Costly |
www.businessinsider.com www.businessinsider.com | Other | 862ms | 80 KB | 46% | €4/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 728ms | 186 KB | 68% | €3/mo | Costly |
micro.rubiconproject.com micro.rubiconproject.com | Other | 625ms | 181 KB | 41% | €3/mo | Costly |
cdn.confiant-integrations.net cdn.confiant-integrations.net | Other | 446ms | 125 KB | 56% | €2/mo | Costly |
cdn.confiant-integrations.net cdn.confiant-integrations.net | Other | 427ms | 142 KB | 60% | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 388ms | 162 KB | 44% | €2/mo | Costly |
my.businessinsider.com my.businessinsider.com | Other | 313ms | 0 KB | — | €1/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 278ms | 148 KB | 42% | €1/mo | Costly |
sdk.mrf.io sdk.mrf.io | Other | 277ms | 59 KB | 44% | €1/mo | Costly |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 229ms | 91 KB | 42% | €1/mo | Costly |
businessinsider.edge.permutive.app businessinsider.edge.permutive.app | Other | 225ms | 192 KB | 22% | €1/mo | Costly |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 218ms | 42 KB | — | €1/mo | Costly |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 189ms | 9 KB | — | €1/mo | Optional |
b-code.liadm.com b-code.liadm.com | Other | 174ms | 46 KB | — | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 162ms | 45 KB | — | €1/mo | Optional |
cdn.sophi.io cdn.sophi.io | Other | 157ms | 43 KB | — | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 144ms | 96 KB | 35% | €1/mo | Optional |
www.businessinsider.com www.businessinsider.com | Other | 125ms | 19 KB | — | €1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 80ms | 34 KB | — | €0/mo | Optional |
my.businessinsider.com my.businessinsider.com | Other | 75ms | 2 KB | — | €0/mo | Optional |
markets.businessinsider.com markets.businessinsider.com | Other | 70ms | 10 KB | — | €0/mo | Optional |
cdn.confiant-integrations.net cdn.confiant-integrations.net | Other | 70ms | 60 KB | — | €0/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 61ms | 19 KB | — | €0/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 53ms | 25 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- www.businessinsider.com adds 3412ms and costs ~€14/month
- Unattributable adds 1106ms and costs ~€5/month
- www.businessinsider.com adds 862ms and costs ~€4/month
- securepubads.g.doubleclick.net adds 728ms and costs ~€3/month
- micro.rubiconproject.com adds 625ms and costs ~€3/month
- cdn.confiant-integrations.net adds 446ms and costs ~€2/month
- cdn.confiant-integrations.net adds 427ms and costs ~€2/month
- Google Tag Manager adds 388ms and costs ~€2/month
- my.businessinsider.com adds 313ms and costs ~€1/month
- Google Tag Manager adds 278ms and costs ~€1/month
- sdk.mrf.io adds 277ms and costs ~€1/month
- c.amazon-adsystem.com adds 229ms and costs ~€1/month
- businessinsider.edge.permutive.app adds 225ms and costs ~€1/month
- cdn.privacy-mgmt.com adds 218ms and costs ~€1/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.businessinsider.com takes 3412ms 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 1106ms 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.businessinsider.com takes 862ms 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
securepubads.g.doubleclick.net takes 728ms 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
68% 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
micro.rubiconproject.com takes 625ms 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
cdn.confiant-integrations.net takes 446ms 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 cdn.confiant-integrations.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
cdn.confiant-integrations.net takes 427ms 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
60% of cdn.confiant-integrations.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
Google Tag Manager takes 388ms 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
my.businessinsider.com takes 313ms 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 278ms 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
sdk.mrf.io takes 277ms 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
c.amazon-adsystem.com takes 229ms 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
businessinsider.edge.permutive.app takes 225ms 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
cdn.privacy-mgmt.com takes 218ms 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