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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
2
PASS
10
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
48
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.30 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

9.24 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

814 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.031

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.09 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.

9.73 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 s
Checks
17
10 PASS 2 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1021.9 KiB of 1022.0 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3322ms total JS execution
FIX
3322ms total JS execution
Warning::
https://buffer.com/: 830ms CPU time
Warning::
https://static.buffer.com/marketing/_next/static/c...: 558ms CPU time
Warning::
Unattributable: 462ms CPU time
Warning::
https://static.buffer.com/marketing/_next/static/c...: 270ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-58P...: 233ms CPU time
Warning::
Third-party scripts: 3322ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Style & Layout 20% Other 15% Script Parsing & Compilation 9% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://buffer.com/830ms16ms1ms3rd
https://static.buffer.com/marketing/_next/static/chunks/framework-604fe8c50eb2aa78.js558ms505ms36ms3rd
Unattributable462ms37ms0ms3rd
https://static.buffer.com/marketing/_next/static/chunks/pages/index-2a0fe5946389d7ba.js270ms260ms8ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-58PRD29233ms172ms59ms3rd
https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/banner.js185ms106ms4ms3rd
https://static.buffer.com/marketing/_next/static/chunks/pages/_app-057ea8724cefdf55.js178ms129ms48ms3rd
https://static.buffer.com/marketing/_next/static/chunks/main-094ec27a71bfe3ad.js160ms140ms19ms3rd
https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/script.js118ms106ms10ms3rd
https://static.buffer.com/marketing/_next/static/chunks/7527-7b4e1b73b11d91bb.js114ms8ms62ms3rd

Showing top 10 of 13 scripts

F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
JS Bundles
Action
21 scripts, 259 KB unused
REVIEW
21 scripts, 259 KB unused
Warning::
https://static.buffer.com/marketing/_next/static/c...: 97 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-58P...: 68 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.buffer.com/marketing/_next/static/c...: 45 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.buffer.com/marketing/_next/static/c...: 29 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.buffer.com/marketing/_next/static/c...: 21 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 259 KB
259 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.buffer.com/marketing/_next/static/chunks/7527-7b4e1b73b11d91bb.js121 KB97 KB (80%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-58PRD29125 KB68 KB (54%)✓3rd
https://static.buffer.com/marketing/_next/static/chunks/pages/_app-057ea8724cefdf55.js79 KB45 KB (57%)✓3rd
https://static.buffer.com/marketing/_next/static/chunks/6375-512c6a265a9f32c6.js40 KB29 KB (73%)✓3rd
https://static.buffer.com/marketing/_next/static/chunks/main-094ec27a71bfe3ad.js40 KB21 KB (54%)✓3rd
https://static.buffer.com/marketing/_next/static/chunks/8370-c70dc1b29cfd9883.js4 KB—✓3rd
https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_buildManifest.js6 KB—✓3rd
https://static.buffer.com/marketing/_next/static/chunks/5243-aac916caf63372f2.js5 KB—✓3rd
https://static.buffer.com/marketing/_next/static/chunks/framework-604fe8c50eb2aa78.js45 KB—✓3rd
https://static.buffer.com/marketing/_next/static/chunks/1463-5827dd93078c9d76.js5 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
49 resources · 1022 KB · 259 KB savings available
REVIEW
49 resources · 1022 KB · 259 KB savings available
Info::
Within 1MB page-weight target
Got: 1022 KB
Info::
~259 KB of savings available
Warning::
48 third-party resources (100% of weight)
49 resources · 1022.0 KiB · 48 third-party Within 1MB page-weight target
JavaScript 57% · 578.3 KiB
Image 23% · 235.5 KiB
Font 10% · 100.2 KiB
Document 7% · 70.9 KiB
CSS 2% · 19.8 KiB
Other 2% · 17.4 KiB

~258.9 KiB of savings available

Remove unused JavaScript: 258.9 KiB
A
Page Weight Budget
1022 KB transferred, 49 requests
PASS
1022 KB transferred, 49 requests
Info::
Page weighs 2.8 MB (1022 KB transferred)
Warning::
JavaScript is 578 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 578 KB
Info::
49 HTTP requests
Info::
Estimated 0.21 g CO2 per page load
1022 KB / 2.4 MB budget
1022 KB transferred
49 requests
0.21 g CO2 per page load
JavaScript 578.3 KiB 57%
Images 234.4 KiB 23%
Fonts 100.2 KiB 10%
HTML 70.9 KiB 7%
CSS 19.8 KiB 2%
Other 15.5 KiB 2%
Other 1.4 KiB 0%
Other 1.1 KiB 0%
Other 260 B 0%
Other 208 B 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
9 images, 0 KB saveable
PASS
9 images, 0 KB saveable
Info::
All images are well-optimized
9 images 234 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
3 fonts (100 KB)
PASS
3 fonts (100 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

100 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.3 s LCP 9.2 shttps://buffer.com/fonts/figtree/figtree-variable.ttffigtree-variable.ttf https://buffer.com/fonts/figtree/figtree-variable.ttf — 35.8 KiB — 162 ms — font-display: swaphttps://buffer.com/fonts/stolzl/stolzl-regular.woff2stolzl-regular.woff2 https://buffer.com/fonts/stolzl/stolzl-regular.woff2 — 28.3 KiB — 147 ms — font-display: swaphttps://buffer.com/fonts/figtree/figtree-variable-italic.ttffigtree-variable-italic... https://buffer.com/fonts/figtree/figtree-variable-italic.ttf — 36.1 KiB — 143 ms — font-display: swap
figtree-variable.ttf ttf swap
Size 36 KB
Load time 162 ms
Start 303 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
stolzl-regular.woff2 woff2 swap
Size 28 KB
Load time 147 ms
Start 303 ms
Risk FOUT — text flashes from fallback to web font
figtree-variable-italic... ttf swap
Size 36 KB
Load time 143 ms
Start 965 ms
Risk FOUT — text flashes from fallback to web font
  • 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 ~22 KB and ~44 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
—
preload
3
dns-prefetch
—
prefetch
—

3 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
49 requests over 2240ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.3 s LCP 9.2 shttps://bufferapp.com// https://bufferapp.com/ — 301 — 91 B — 17 ms — h2https://buffer.com/buffer.com/ https://buffer.com/ — 200 — 70.9 KiB — 64 ms — h3https://static.buffer.com/marketing/_next/static/css/eb35c95447a7c7c9.cssstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/css/eb35c95447a7c7c9.css — 200 — 5.8 KiB — 74 ms — h3https://static.buffer.com/marketing/_next/static/css/14b74945a0ad05da.cssstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/css/14b74945a0ad05da.css — 200 — 5.9 KiB — 62 ms — h3https://static.buffer.com/marketing/_next/static/css/5f48e04623e80530.cssstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/css/5f48e04623e80530.css — 200 — 8.1 KiB — 70 ms — h3https://static.buffer.com/marketing/_next/static/chunks/webpack-3d7d3ea3ca6b6c97.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/webpack-3d7d3ea3ca6b6c97.js — 200 — 1.5 KiB — 72 ms — h3https://static.buffer.com/marketing/_next/static/chunks/framework-604fe8c50eb2aa78.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/framework-604fe8c50eb2aa78.js — 200 — 45.0 KiB — 79 ms — h3https://static.buffer.com/marketing/_next/static/chunks/main-094ec27a71bfe3ad.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/main-094ec27a71bfe3ad.js — 200 — 39.8 KiB — 77 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 22 ms — h2https://buffer.com/icons/site.webmanifestbuffer.com/icons/site.webmanifest https://buffer.com/icons/site.webmanifest — 200 — 1.4 KiB — 473 ms — h3https://static.buffer.com/marketing/_next/static/chunks/pages/_app-057ea8724cefdf55.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/pages/_app-057ea8724cefdf55.js — 200 — 79.2 KiB — 70 ms — h3https://static.buffer.com/marketing/_next/static/chunks/7527-7b4e1b73b11d91bb.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/7527-7b4e1b73b11d91bb.js — 200 — 121.2 KiB — 75 ms — h3https://static.buffer.com/marketing/_next/static/chunks/8370-c70dc1b29cfd9883.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/8370-c70dc1b29cfd9883.js — 200 — 4.4 KiB — 40 ms — h3https://static.buffer.com/marketing/_next/static/chunks/5243-aac916caf63372f2.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/5243-aac916caf63372f2.js — 200 — 4.6 KiB — 44 ms — h3https://static.buffer.com/marketing/_next/static/chunks/6375-512c6a265a9f32c6.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/6375-512c6a265a9f32c6.js — 200 — 39.7 KiB — 73 ms — h3https://static.buffer.com/marketing/_next/static/chunks/223-8a6c6073ca31828b.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/223-8a6c6073ca31828b.js — 200 — 29.0 KiB — 60 ms — h3https://static.buffer.com/marketing/_next/static/chunks/1463-5827dd93078c9d76.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/1463-5827dd93078c9d76.js — 200 — 5.2 KiB — 48 ms — h3https://static.buffer.com/marketing/_next/static/chunks/pages/index-2a0fe5946389d7ba.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/pages/index-2a0fe5946389d7ba.js — 200 — 10.8 KiB — 62 ms — h3https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_buildManifest.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_buildManifest.js — 200 — 5.9 KiB — 53 ms — h3https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_ssgManifest.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_ssgManifest.js — 200 — 714 B — 73 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/publish-composer.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/publish-composer.webp — 200 — 50.3 KiB — 42 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/create-ideas.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/create-ideas.webp — 200 — 58.4 KiB — 46 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/community-comments.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/community-comments.webp — 200 — 56.5 KiB — 46 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/insights.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/insights.webp — 200 — 50.1 KiB — 46 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/collaborate.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/collaborate.webp — 200 — 7.1 KiB — 62 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/mobile-app.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/mobile-app.webp — 200 — 8.5 KiB — 80 ms — h3https://buffer.com/fonts/figtree/figtree-variable.ttfbuffer.com/fonts/figtree/figtree-va... https://buffer.com/fonts/figtree/figtree-variable.ttf — 200 — 35.8 KiB — 162 ms — h3https://buffer.com/fonts/stolzl/stolzl-regular.woff2buffer.com/fonts/stolzl/stolzl-regu... https://buffer.com/fonts/stolzl/stolzl-regular.woff2 — 200 — 28.3 KiB — 147 ms — h3https://segment-analytics.buffer.com/analytics.js/v1/xeEMmVDZY8h6SN541b4qos5mmHCNcMK5/analytics.min.jssegment-analytics.buffer.com/analyt... https://segment-analytics.buffer.com/analytics.js/v1/xeEMmVDZY8h6SN541b4qos5mmHCNcMK5/analytics.min.js — 200 — 30.1 KiB — 785 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-58PRD29www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-58PRD29 — 200 — 125.4 KiB — 48 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.3 s LCP 9.2 shttps://bufferapp.com// https://bufferapp.com/ — 301 — 91 B — 17 ms — h2https://buffer.com/buffer.com/ https://buffer.com/ — 200 — 70.9 KiB — 64 ms — h3https://static.buffer.com/marketing/_next/static/css/eb35c95447a7c7c9.cssstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/css/eb35c95447a7c7c9.css — 200 — 5.8 KiB — 74 ms — h3https://static.buffer.com/marketing/_next/static/css/14b74945a0ad05da.cssstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/css/14b74945a0ad05da.css — 200 — 5.9 KiB — 62 ms — h3https://static.buffer.com/marketing/_next/static/css/5f48e04623e80530.cssstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/css/5f48e04623e80530.css — 200 — 8.1 KiB — 70 ms — h3https://static.buffer.com/marketing/_next/static/chunks/webpack-3d7d3ea3ca6b6c97.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/webpack-3d7d3ea3ca6b6c97.js — 200 — 1.5 KiB — 72 ms — h3https://static.buffer.com/marketing/_next/static/chunks/framework-604fe8c50eb2aa78.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/framework-604fe8c50eb2aa78.js — 200 — 45.0 KiB — 79 ms — h3https://static.buffer.com/marketing/_next/static/chunks/main-094ec27a71bfe3ad.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/main-094ec27a71bfe3ad.js — 200 — 39.8 KiB — 77 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 22 ms — h2https://buffer.com/icons/site.webmanifestbuffer.com/icons/site.webmanifest https://buffer.com/icons/site.webmanifest — 200 — 1.4 KiB — 473 ms — h3https://static.buffer.com/marketing/_next/static/chunks/pages/_app-057ea8724cefdf55.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/pages/_app-057ea8724cefdf55.js — 200 — 79.2 KiB — 70 ms — h3https://static.buffer.com/marketing/_next/static/chunks/7527-7b4e1b73b11d91bb.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/7527-7b4e1b73b11d91bb.js — 200 — 121.2 KiB — 75 ms — h3https://static.buffer.com/marketing/_next/static/chunks/8370-c70dc1b29cfd9883.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/8370-c70dc1b29cfd9883.js — 200 — 4.4 KiB — 40 ms — h3https://static.buffer.com/marketing/_next/static/chunks/5243-aac916caf63372f2.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/5243-aac916caf63372f2.js — 200 — 4.6 KiB — 44 ms — h3https://static.buffer.com/marketing/_next/static/chunks/6375-512c6a265a9f32c6.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/6375-512c6a265a9f32c6.js — 200 — 39.7 KiB — 73 ms — h3https://static.buffer.com/marketing/_next/static/chunks/223-8a6c6073ca31828b.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/223-8a6c6073ca31828b.js — 200 — 29.0 KiB — 60 ms — h3https://static.buffer.com/marketing/_next/static/chunks/1463-5827dd93078c9d76.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/1463-5827dd93078c9d76.js — 200 — 5.2 KiB — 48 ms — h3https://static.buffer.com/marketing/_next/static/chunks/pages/index-2a0fe5946389d7ba.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/chunks/pages/index-2a0fe5946389d7ba.js — 200 — 10.8 KiB — 62 ms — h3https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_buildManifest.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_buildManifest.js — 200 — 5.9 KiB — 53 ms — h3https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_ssgManifest.jsstatic.buffer.com/marketing/_next/s... https://static.buffer.com/marketing/_next/static/mrnspFmY5eqUJCjBZitlT/_ssgManifest.js — 200 — 714 B — 73 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/publish-composer.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/publish-composer.webp — 200 — 50.3 KiB — 42 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/create-ideas.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/create-ideas.webp — 200 — 58.4 KiB — 46 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/community-comments.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/community-comments.webp — 200 — 56.5 KiB — 46 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/insights.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/insights.webp — 200 — 50.1 KiB — 46 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/collaborate.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/collaborate.webp — 200 — 7.1 KiB — 62 ms — h3https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/mobile-app.webpbuffer.com/cdn-cgi/image/width=1920... https://buffer.com/cdn-cgi/image/width=1920,quality=75,format=auto//img/homepage/mobile-app.webp — 200 — 8.5 KiB — 80 ms — h3https://buffer.com/fonts/figtree/figtree-variable.ttfbuffer.com/fonts/figtree/figtree-va... https://buffer.com/fonts/figtree/figtree-variable.ttf — 200 — 35.8 KiB — 162 ms — h3https://buffer.com/fonts/stolzl/stolzl-regular.woff2buffer.com/fonts/stolzl/stolzl-regu... https://buffer.com/fonts/stolzl/stolzl-regular.woff2 — 200 — 28.3 KiB — 147 ms — h3https://segment-analytics.buffer.com/analytics.js/v1/xeEMmVDZY8h6SN541b4qos5mmHCNcMK5/analytics.min.jssegment-analytics.buffer.com/analyt... https://segment-analytics.buffer.com/analytics.js/v1/xeEMmVDZY8h6SN541b4qos5mmHCNcMK5/analytics.min.js — 200 — 30.1 KiB — 785 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-58PRD29www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-58PRD29 — 200 — 125.4 KiB — 48 ms — h2https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/script.jscdn-cookieyes.com/client_data/73a74... https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/script.js — 200 — 9.7 KiB — 35 ms — h2https://www.dubcdn.com/analytics/script.jswww.dubcdn.com/analytics/script.js https://www.dubcdn.com/analytics/script.js — 200 — 2.1 KiB — 40 ms — h3https://buffer.com/cdn-cgi/rum?buffer.com/cdn-cgi/rum? https://buffer.com/cdn-cgi/rum? — 204 — 208 B — 14 ms — h3https://buffer.com/icons/favicon.svgbuffer.com/icons/favicon.svg https://buffer.com/icons/favicon.svg — 200 — 1.0 KiB — 205 ms — h3https://log.cookieyes.com/api/v1/loglog.cookieyes.com/api/v1/log https://log.cookieyes.com/api/v1/log — 200 — 260 B — 59 ms — h3https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/banner.jscdn-cookieyes.com/client_data/73a74... https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/banner.js — 200 — 8.5 KiB — 28 ms — h2https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/lhcVu-47.jsoncdn-cookieyes.com/client_data/73a74... https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/lhcVu-47.json — 200 — 380 B — 22 ms — h2https://directory.cookieyes.com/api/v1/ipdirectory.cookieyes.com/api/v1/ip https://directory.cookieyes.com/api/v1/ip — 200 — 420 B — 44 ms — h3https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/config/mT61MaaI.jsoncdn-cookieyes.com/client_data/73a74... https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/config/mT61MaaI.json — 200 — 7.1 KiB — 14 ms — h2https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/translations/QsH9zzAe.jsoncdn-cookieyes.com/client_data/73a74... https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/translations/QsH9zzAe.json — 200 — 830 B — 15 ms — h2https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/audit-table/v0fpnrcA.jsoncdn-cookieyes.com/client_data/73a74... https://cdn-cookieyes.com/client_data/73a7491b50fa6e35a4e9e152/audit-table/v0fpnrcA.json — 200 — 4.9 KiB — 12 ms — h2https://cdn-cookieyes.com/assets/images/revisit.svgcdn-cookieyes.com/assets/images/rev... https://cdn-cookieyes.com/assets/images/revisit.svg — 200 — 1.2 KiB — 11 ms — h2https://cdn-cookieyes.com/assets/images/close.svgcdn-cookieyes.com/assets/images/clo... https://cdn-cookieyes.com/assets/images/close.svg — 200 — 788 B — 14 ms — h2https://cdn-cookieyes.com/assets/images/poweredbtcky.svgcdn-cookieyes.com/assets/images/pow... https://cdn-cookieyes.com/assets/images/poweredbtcky.svg — 200 — 1.5 KiB — 12 ms — h2https://buffer.com/fonts/figtree/figtree-variable-italic.ttfbuffer.com/fonts/figtree/figtree-va... https://buffer.com/fonts/figtree/figtree-variable-italic.ttf — 200 — 36.1 KiB — 143 ms — h3https://segment-analytics.buffer.com/v1/projects/xeEMmVDZY8h6SN541b4qos5mmHCNcMK5/settingssegment-analytics.buffer.com/v1/pro... https://segment-analytics.buffer.com/v1/projects/xeEMmVDZY8h6SN541b4qos5mmHCNcMK5/settings — 200 — 1.5 KiB — 10 ms — h2https://segment-analytics.buffer.com/analytics-next/bundles/ajs-destination.bundle.8e6b895db75187c55313.jssegment-analytics.buffer.com/analyt... https://segment-analytics.buffer.com/analytics-next/bundles/ajs-destination.bundle.8e6b895db75187c55313.js — 200 — 3.6 KiB — 5 ms — h2https://segment-analytics.buffer.com/analytics-next/bundles/schemaFilter.bundle.1b218d13fed021531d4e.jssegment-analytics.buffer.com/analyt... https://segment-analytics.buffer.com/analytics-next/bundles/schemaFilter.bundle.1b218d13fed021531d4e.js — 200 — 1.3 KiB — 4 ms — h2https://segment-api.buffer.com/v1/psegment-api.buffer.com/v1/p https://segment-api.buffer.com/v1/p — 200 — 326 B — 715 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3322ms · 553KB · €58/mo
buffer.com
Other
Costly
Execution 830ms
Transfer 71 KB
Monthly Cost €14/mo
static.buffer.com
Other
Costly
Execution 558ms
Transfer 45 KB
Monthly Cost €10/mo
Unattributable
Other
Costly
Execution 462ms
Transfer 0 KB
Monthly Cost €8/mo
static.buffer.com
Other
Costly
Execution 270ms
Transfer 11 KB
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 233ms
Transfer 125 KB
Unused 54%
Monthly Cost €4/mo
cdn-cookieyes.com
Other
Optional
Execution 185ms
Transfer 8 KB
Monthly Cost €3/mo
static.buffer.com
Other
Optional
Execution 178ms
Transfer 79 KB
Unused 57%
Monthly Cost €3/mo
static.buffer.com
Other
Optional
Execution 160ms
Transfer 40 KB
Unused 54%
Monthly Cost €3/mo
cdn-cookieyes.com
Other
Optional
Execution 118ms
Transfer 10 KB
Monthly Cost €2/mo
static.buffer.com
Other
Optional
Execution 114ms
Transfer 121 KB
Unused 80%
Monthly Cost €2/mo
segment-analytics.buffer.com
Other
Optional
Execution 84ms
Transfer 1 KB
Monthly Cost €1/mo
static.cloudflareinsights.com
Other
Optional
Execution 67ms
Transfer 11 KB
Monthly Cost €1/mo
segment-analytics.buffer.com
Other
Optional
Execution 63ms
Transfer 30 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • buffer.com adds 830ms and costs ~€14/month
  • static.buffer.com adds 558ms and costs ~€10/month
  • Unattributable adds 462ms and costs ~€8/month
  • static.buffer.com adds 270ms and costs ~€5/month
  • Google Tag Manager adds 233ms and costs ~€4/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

buffer.com takes 830ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.buffer.com takes 558ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 462ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.buffer.com takes 270ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 233ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

54% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

57% of static.buffer.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

54% of static.buffer.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

80% of static.buffer.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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