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.
1.61 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.27 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
607 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.
2.15 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.
5.44 s
Page Load Progression
FPage Weight BudgetAction3.3 MB transferred, 125 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
DJS Execution CostAction3082ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://buffalonews.com/ | 404ms | 25ms | 8ms | 1st |
| https://cmp.osano.com/16CVqQSid6k3038vU/fef0f8b2-698d-45ee-89c5-d8fbf51fbfb7/osano.js | 397ms | 334ms | 12ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 333ms | 260ms | 35ms | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 290ms | 256ms | 12ms | 3rd |
| Unattributable | 214ms | 9ms | 0ms | 3rd |
| https://bloximages.chicago2.vip.townnews.com/buffalonews.com/shared-content/art/tncms/templates/libraries/flex/components/plugins/resources/scripts/common.08a61544f369cc43bf02e71b2d10d49f.js | 183ms | 101ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TDWDC2 | 153ms | 109ms | 27ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WXMV2VZ>m=4e64k0 | 140ms | 122ms | 17ms | 3rd |
| https://a.pub.network/buffalonews-com/pubfig.engine.js | 133ms | 111ms | 17ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 120ms | 84ms | 20ms | 3rd |
Showing top 10 of 18 scripts
FJS BundlesAction54 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/m202604160201/pubads_impl.js | 188 KB | 128 KB (68%) | ✓ | 3rd |
| https://a.pub.network/buffalonews-com/pubfig.engine.js | 152 KB | 80 KB (53%) | ✓ | 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=4e64k0 | 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 InventoryAction125 resources · 3.3 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 125 resources | 3.3 MiB | ||||||
CImage OptimizationAction23 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 HintsNo optimization neededPASS
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 Waterfall125 requests over 4916msINFO
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 | 397ms | 78 KB | — | $7/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 333ms | 0 KB | 49% | $6/mo | Costly |
c.amazon-adsystem.com c.amazon-adsystem.com | Other | 290ms | 91 KB | 55% | $5/mo | Costly |
Unattributable Unattributable | Other | 214ms | 0 KB | — | $4/mo | Costly |
bloximages.chicago2.vip.townnews.com bloximages.chicago2.vip.townnews.com | Other | 183ms | 14 KB | — | $3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 153ms | 203 KB | 33% | $3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 140ms | 135 KB | 39% | $2/mo | Optional |
a.pub.network a.pub.network | Other | 133ms | 152 KB | 53% | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 120ms | 188 KB | 68% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 113ms | 174 KB | 37% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 107ms | 153 KB | 42% | $2/mo | Optional |
bloximages.chicago2.vip.townnews.com bloximages.chicago2.vip.townnews.com | Other | 103ms | 38 KB | — | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 98ms | 122 KB | 51% | $2/mo | Optional |
a.pub.network a.pub.network | Other | 87ms | 198 KB | 74% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 76ms | 120 KB | 55% | $1/mo | Optional |
tagan.adlightning.com tagan.adlightning.com | Other | 68ms | 32 KB | 74% | $1/mo | Optional |
tagan.adlightning.com tagan.adlightning.com | Other | 61ms | 15 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- cmp.osano.com adds 397ms and costs ~$7/month
- www.gstatic.com adds 333ms and costs ~$6/month
- c.amazon-adsystem.com adds 290ms and costs ~$5/month
- Unattributable adds 214ms and costs ~$4/month
87% 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 397ms 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.gstatic.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
c.amazon-adsystem.com takes 290ms 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 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
Unattributable takes 214ms 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 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
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
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
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
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
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