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.
4.31 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.14 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.85 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.004
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.00 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.
24.70 s
Page Load Progression
FPage Weight BudgetAction3.3 MB transferred, 120 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 ImpactAction97% third-party, 0 ms blockingFIX
FJS Execution CostAction12633ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://buffalonews.com/ | 1491ms | 83ms | 27ms | 1st |
| https://cmp.osano.com/16CVqQSid6k3038vU/fef0f8b2-698d-45ee-89c5-d8fbf51fbfb7/osano.js | 1490ms | 1206ms | 50ms | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 1225ms | 1057ms | 47ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 1117ms | 927ms | 137ms | 3rd |
| Unattributable | 715ms | 37ms | 0ms | 3rd |
| https://config.aps.amazon-adsystem.com/configs/0ab198dd-b265-462a-ae36-74e163ad6159 | 629ms | 598ms | 16ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TDWDC2 | 556ms | 406ms | 102ms | 3rd |
| https://bloximages.chicago2.vip.townnews.com/buffalonews.com/shared-content/art/tncms/templates/libraries/flex/components/plugins/resources/scripts/common.08a61544f369cc43bf02e71b2d10d49f.js | 552ms | 385ms | 4ms | 3rd |
| https://a.pub.network/buffalonews-com/pubfig.engine.mobile.js | 492ms | 412ms | 66ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31098007 | 477ms | 282ms | 90ms | 3rd |
Showing top 10 of 24 scripts
FJS BundlesAction55 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://a.pub.network/buffalonews-com/prebid.js | 198 KB | 147 KB (74%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31098007 | 188 KB | 130 KB (69%) | ✓ | 3rd |
| https://a.pub.network/buffalonews-com/pubfig.engine.mobile.js | 152 KB | 77 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TDWDC2 | 203 KB | 68 KB (33%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5MTD44X>m=4e64k0 | 120 KB | 67 KB (55%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7WMGT4N7SH&cx=c>m=4e64k1h2 | 174 KB | 65 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-4T2EB147B8&cx=c>m=4e64k0 | 153 KB | 64 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 InventoryAction120 resources · 3.3 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 120 resources | 3.3 MiB | ||||||
CImage OptimizationAction16 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
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 Loading2 fonts (60 KB)PASS
Web fonts
2
60 KB total
Render-blocking
0
of 2
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 Hints73 hints, 0 missing preconnectsPASS
Current Resource Hints
73 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+HTTP Cachingmax-age=60 (1 minute)PASS
public, max-age=60, s-maxage=30, must-revalidate, proxy-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 60 | Cache for 1 minute |
| s-maxage | 30 | CDN caches for 30 seconds |
| must-revalidate | — | Must recheck with server after expiry |
| proxy-revalidate | — |
Network Waterfall120 requests over 4759msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cmp.osano.com cmp.osano.com | Other | 1490ms | 78 KB | — | $26/mo | Costly |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 1225ms | 91 KB | 56% | $21/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 1117ms | 0 KB | 49% | $19/mo | Costly |
Unattributable Unattributable | Other | 715ms | 0 KB | — | $12/mo | Costly |
config.aps.amazon-adsystem.com config.aps.amazon-adsystem.com | Other | 629ms | 7 KB | — | $11/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 556ms | 203 KB | 33% | $10/mo | Costly |
bloximages.chicago2.vip.townnews.com bloximages.chicago2.vip.townnews.com | Other | 552ms | 14 KB | — | $10/mo | Costly |
a.pub.network a.pub.network | Other | 492ms | 152 KB | 51% | $9/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 477ms | 188 KB | 69% | $8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 477ms | 153 KB | 42% | $8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 465ms | 135 KB | 39% | $8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 436ms | 174 KB | 37% | $8/mo | Costly |
bloximages.chicago2.vip.townnews.com bloximages.chicago2.vip.townnews.com | Other | 368ms | 38 KB | — | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 364ms | 122 KB | 51% | $6/mo | Costly |
a.pub.network a.pub.network | Other | 283ms | 198 KB | 74% | $5/mo | Costly |
tagan.adlightning.com tagan.adlightning.com | Other | 282ms | 32 KB | 74% | $5/mo | Costly |
tagan.adlightning.com tagan.adlightning.com | Other | 271ms | 15 KB | — | $5/mo | Costly |
a.pub.network a.pub.network | Other | 181ms | 26 KB | — | $3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 178ms | 120 KB | 55% | $3/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 167ms | 34 KB | — | $3/mo | Optional |
bloximages.chicago2.vip.townnews.com bloximages.chicago2.vip.townnews.com | Other | 155ms | 115 KB | — | $3/mo | Optional |
tagan.adlightning.com tagan.adlightning.com | Other | 144ms | 85 KB | — | $2/mo | Optional |
cmp.osano.com cmp.osano.com | Other | 119ms | 29 KB | — | $2/mo | Optional |
These scripts may cost more than they're worth
- cmp.osano.com adds 1490ms and costs ~$26/month
- c.amazon-adsystem.com adds 1225ms and costs ~$21/month
- www.gstatic.com adds 1117ms and costs ~$19/month
- Unattributable adds 715ms and costs ~$12/month
- config.aps.amazon-adsystem.com adds 629ms and costs ~$11/month
- Google Tag Manager adds 556ms and costs ~$10/month
- bloximages.chicago2.vip.townnews.com adds 552ms and costs ~$10/month
- a.pub.network adds 492ms and costs ~$9/month
- securepubads.g.doubleclick.net adds 477ms and costs ~$8/month
- Google Tag Manager adds 477ms and costs ~$8/month
- Google Tag Manager adds 465ms and costs ~$8/month
- Google Tag Manager adds 436ms and costs ~$8/month
- bloximages.chicago2.vip.townnews.com adds 368ms and costs ~$6/month
- Google Tag Manager adds 364ms and costs ~$6/month
- a.pub.network adds 283ms and costs ~$5/month
- tagan.adlightning.com adds 282ms and costs ~$5/month
- tagan.adlightning.com adds 271ms and costs ~$5/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
cmp.osano.com takes 1490ms 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 1225ms 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 c.amazon-adsystem.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.gstatic.com takes 1117ms 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 715ms 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
config.aps.amazon-adsystem.com takes 629ms 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 556ms 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
bloximages.chicago2.vip.townnews.com takes 552ms 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
a.pub.network takes 492ms 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
51% of a.pub.network'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
securepubads.g.doubleclick.net takes 477ms 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
69% 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
Google Tag Manager takes 477ms 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 465ms 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 436ms 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
bloximages.chicago2.vip.townnews.com takes 368ms 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 364ms 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
51% 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
a.pub.network takes 283ms 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
74% of a.pub.network'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
tagan.adlightning.com takes 282ms 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
74% of tagan.adlightning.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
tagan.adlightning.com takes 271ms 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
55% 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