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https://404media.co

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
3
REVIEW
5
PASS
7
INFO
2

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

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
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.
77
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.

2.60 s

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

3.32 s

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

327 ms

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

0.068

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

3.28 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.

11.43 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
7 PASS 5 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 (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
18 scripts, 333 KB unused
FIX
18 scripts, 333 KB unused
Warning::
https://js.stripe.com/v3/: 164 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/po...: 91 KB unused (23%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/um...: 54 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.404media.co/assets/dist/app.min.js?v=c...: 23 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 333 KB
333 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://js.stripe.com/v3/226 KB164 KB (73%)✓3rd
https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/portal.min.js436 KB91 KB (23%)✓3rd
https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/umd/sodo-search.min.js98 KB54 KB (56%)✓3rd
https://www.404media.co/assets/dist/app.min.js?v=c2986781e838 KB23 KB (62%)✓3rd
https://www.404media.co/public/member-attribution.min.js?v=c2986781e81 KB—✓3rd
https://www.404media.co/assets/js/bsa.js?v=c2986781e81 KB—✓3rd
https://www.404media.co/public/cards.min.js?v=c2986781e82 KB—✓3rd
https://www.404media.co/public/comment-counts.min.js?v=c2986781e81 KB—✓3rd
https://assets.outpost.pub/assets/v2/js/outpost-pub.js16 KB—✓3rd
https://www.404media.co/public/ghost-stats.min.js?v=c2986781e813 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

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.

B
Page Weight Budget
1.2 MB transferred, 64 requests
REVIEW
1.2 MB transferred, 64 requests
Info::
Page weighs 4.6 MB (1.2 MB transferred)
Warning::
JavaScript is 920 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 920 KB
Info::
64 HTTP requests
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
64 requests
0.25 g CO2 per page load
JavaScript 920.2 KiB 74%
Fonts 102.1 KiB 8%
Images 79.6 KiB 6%
Other 59.6 KiB 5%
CSS 31.1 KiB 3%
HTML 15.1 KiB 1%
Other 14.5 KiB 1%
Other 12.7 KiB 1%
Other 977 B 0%
Other 0 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

B
Image Optimization
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
https://static4.buysellads.net/uu/7/142269/1701723... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 80 KB
0 oversized -0 KB
9 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1824ms total JS execution
REVIEW
1824ms total JS execution
Warning::
https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/po...: 485ms CPU time
Warning::
https://www.404media.co/: 445ms CPU time
Warning::
Unattributable: 253ms CPU time
Info::
https://js.stripe.com/v3/: 209ms CPU time
Info::
https://assets.context.ly/kit/6.latest/loader.js: 159ms CPU time
Warning::
Third-party scripts: 1824ms (100% of total)

Main Thread Breakdown

Script Evaluation 43% Other 20% Script Parsing & Compilation 17% Style & Layout 14% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/portal.min.js485ms299ms182ms3rd
https://www.404media.co/445ms12ms3ms3rd
Unattributable253ms29ms0ms3rd
https://js.stripe.com/v3/209ms129ms79ms3rd
https://assets.context.ly/kit/6.latest/loader.js159ms135ms2ms3rd
https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/umd/sodo-search.min.js125ms98ms24ms3rd
https://www.404media.co/assets/dist/app.min.js?v=c2986781e895ms43ms13ms3rd
https://cdn.jsdelivr.net/ghost/announcement-bar@~1.1/umd/announcement-bar.min.js52ms40ms10ms3rd
C
Page Weight Inventory
Action
64 resources · 1.2 MB · 333 KB savings available
REVIEW
64 resources · 1.2 MB · 333 KB savings available
Warning::
Page weight 212 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~333 KB of savings available
Warning::
63 third-party resources (100% of weight)
Info::
2 resources over 200KB
64 resources · 1.2 MiB · 63 third-party 211.8 KiB over 1MB target
JavaScript 78% · 964.6 KiB
Font 8% · 102.1 KiB
Image 8% · 94.0 KiB
CSS 4% · 43.7 KiB
Other 1% · 16.1 KiB
Document 1% · 15.3 KiB

~332.5 KiB of savings available

Remove unused JavaScript: 332.5 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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+
Font Loading
4 fonts (102 KB)
PASS
4 fonts (102 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

102 KB total

Render-blocking

0

of 4

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 FCP 2.6 s LCP 3.3 shttps://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2V8mDoQDjQSkFtoMM3T6r8E7... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2 — 21.8 KiB — 50 ms — font-display: swaphttps://fonts.gstatic.com/s/spacemono/v17/i7dPIFZifjKcF5UAWdDRYEF8RXi4EwQ.woff2i7dPIFZifjKcF5UAWdDRYEF... https://fonts.gstatic.com/s/spacemono/v17/i7dPIFZifjKcF5UAWdDRYEF8RXi4EwQ.woff2 — 9.3 KiB — 45 ms — font-display: swaphttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 67 ms — font-display: swaphttps://assets.outpostpublishingcoop.com/assets/fonts/Inter/font_6.woff2font_6.woff2 https://assets.outpostpublishingcoop.com/assets/fonts/Inter/font_6.woff2 — 23.7 KiB — 99 ms — font-display: swap
V8mDoQDjQSkFtoMM3T6r8E7... woff2 swap
Size 22 KB
Load time 50 ms
Start 275 ms
Risk FOUT — text flashes from fallback to web font
i7dPIFZifjKcF5UAWdDRYEF... woff2 swap
Size 9 KB
Load time 45 ms
Start 275 ms
Risk FOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 67 ms
Start 275 ms
Risk FOUT — text flashes from fallback to web font
font_6.woff2 woff2 swap
Size 24 KB
Load time 99 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
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 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
2
preload
2
dns-prefetch
—
prefetch
—

4 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
Network Waterfall
64 requests over 2290ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.6 s LCP 3.3 shttps://404media.co// https://404media.co/ — 302 — 113 B — 99 ms — h2https://www.404media.co/www.404media.co/ https://www.404media.co/ — 200 — 12.3 KiB — 13 ms — h2https://www.404media.co/assets/dist/app.min.js?v=c2986781e8www.404media.co/assets/dist/app.min... https://www.404media.co/assets/dist/app.min.js?v=c2986781e8 — 200 — 37.7 KiB — 14 ms — h2https://www.404media.co/assets/dist/app.min.css?v=c2986781e8www.404media.co/assets/dist/app.min... https://www.404media.co/assets/dist/app.min.css?v=c2986781e8 — 200 — 20.0 KiB — 10 ms — h2https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700fonts.googleapis.com/css2?family=Sp... https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700 — 200 — 588 B — 119 ms — h2https://fonts.googleapis.com/css2?family=Inter:wght@400;700fonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@400;700 — 200 — 1.1 KiB — 116 ms — h2https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700fonts.googleapis.com/css2?family=Sp... https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700 — 200 — 592 B — 117 ms — h2https://www.404media.co/public/cards.min.css?v=c2986781e8www.404media.co/public/cards.min.cs... https://www.404media.co/public/cards.min.css?v=c2986781e8 — 200 — 7.7 KiB — 13 ms — h2https://www.404media.co/assets/images/img-placeholder-md.jpg?v=c2986781e8www.404media.co/assets/images/img-p... https://www.404media.co/assets/images/img-placeholder-md.jpg?v=c2986781e8 — 200 — 2.7 KiB — 23 ms — h2https://www.gravatar.com/avatar/87e07bd5bb3d003b0b135303a3e7f8b9?s=250&r=x&d=mpwww.gravatar.com/avatar/87e07bd5bb3... https://www.gravatar.com/avatar/87e07bd5bb3d003b0b135303a3e7f8b9?s=250&r=x&d=mp — 200 — 12.3 KiB — 33 ms — h2https://assets.outpost.pub/assets/v2/js/outpost-pub.jsassets.outpost.pub/assets/v2/js/out... https://assets.outpost.pub/assets/v2/js/outpost-pub.js — 200 — 16.3 KiB — 740 ms — http/1.1https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/portal.min.jscdn.jsdelivr.net/ghost/portal@~2.68... https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/portal.min.js — 200 — 436.0 KiB — 66 ms — h2https://js.stripe.com/v3/js.stripe.com/v3/ https://js.stripe.com/v3/ — 200 — 226.4 KiB — 164 ms — h2https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/umd/sodo-search.min.jscdn.jsdelivr.net/ghost/sodo-search@... https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/umd/sodo-search.min.js — 200 — 97.7 KiB — 55 ms — h2https://cdn.jsdelivr.net/ghost/announcement-bar@~1.1/umd/announcement-bar.min.jscdn.jsdelivr.net/ghost/announcement... https://cdn.jsdelivr.net/ghost/announcement-bar@~1.1/umd/announcement-bar.min.js — 200 — 44.2 KiB — 53 ms — h2https://www.404media.co/public/cards.min.js?v=c2986781e8www.404media.co/public/cards.min.js... https://www.404media.co/public/cards.min.js?v=c2986781e8 — 200 — 1.9 KiB — 9 ms — h2https://www.404media.co/public/comment-counts.min.js?v=c2986781e8www.404media.co/public/comment-coun... https://www.404media.co/public/comment-counts.min.js?v=c2986781e8 — 200 — 923 B — 8 ms — h2https://www.404media.co/public/member-attribution.min.js?v=c2986781e8www.404media.co/public/member-attri... https://www.404media.co/public/member-attribution.min.js?v=c2986781e8 — 200 — 1.5 KiB — 10 ms — h2https://www.404media.co/public/ghost-stats.min.js?v=c2986781e8www.404media.co/public/ghost-stats.... https://www.404media.co/public/ghost-stats.min.js?v=c2986781e8 — 200 — 12.7 KiB — 13 ms — h2https://plausible.io/js/script.hash.outbound-links.jsplausible.io/js/script.hash.outboun... https://plausible.io/js/script.hash.outbound-links.js — 200 — 2.1 KiB — 125 ms — h2https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/404-jason-01-copy.jpegstorage.ghost.io/c/0f/76/0f76b548-b... https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/404-jason-01-copy.jpeg — 200 — 1.3 KiB — 26 ms — h2https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/404-sam-10--1-.jpgstorage.ghost.io/c/0f/76/0f76b548-b... https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/404-sam-10--1-.jpg — 200 — 1.0 KiB — 27 ms — h2https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/headshot-1.jpgstorage.ghost.io/c/0f/76/0f76b548-b... https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/headshot-1.jpg — 200 — 1.0 KiB — 27 ms — h2https://www.404media.co/assets/js/bsa.js?v=c2986781e8www.404media.co/assets/js/bsa.js?v=... https://www.404media.co/assets/js/bsa.js?v=c2986781e8 — 200 — 1.4 KiB — 13 ms — h2https://www.404media.co/assets/icons/feather-sprite.svg?v=c2986781e8www.404media.co/assets/icons/feathe... https://www.404media.co/assets/icons/feather-sprite.svg?v=c2986781e8 — 200 — 11.1 KiB — 9 ms — h2https://www.404media.co/assets/manifest.webmanifest?v=c2986781e8www.404media.co/assets/manifest.web... https://www.404media.co/assets/manifest.webmanifest?v=c2986781e8 — 200 — 977 B — 9 ms — h2https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2024/09/7BaR_tNV_400x400-1.jpgstorage.ghost.io/c/0f/76/0f76b548-b... https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2024/09/7BaR_tNV_400x400-1.jpg — 200 — 1.1 KiB — 4 ms — h2https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/404-joseph-01-1.jpgstorage.ghost.io/c/0f/76/0f76b548-b... https://storage.ghost.io/c/0f/76/0f76b548-bc58-4f25-abc3-3f5ebca07da4/content/images/size/w30/2023/08/404-joseph-01-1.jpg — 200 — 1.0 KiB — 3 ms — h2https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2fonts.gstatic.com/s/spacegrotesk/v2... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2 — 200 — 21.8 KiB — 50 ms — h3https://fonts.gstatic.com/s/spacemono/v17/i7dPIFZifjKcF5UAWdDRYEF8RXi4EwQ.woff2fonts.gstatic.com/s/spacemono/v17/i... https://fonts.gstatic.com/s/spacemono/v17/i7dPIFZifjKcF5UAWdDRYEF8RXi4EwQ.woff2 — 200 — 9.3 KiB — 45 ms — h3
0 ms 1.0 s 2.0 s 3.0 s FCP 2.6 s LCP 3.3 shttps://404media.co// https://404media.co/ — 302 — 113 B — 99 ms — h2https://www.404media.co/www.404media.co/ https://www.404media.co/ — 200 — 12.3 KiB — 13 ms — h2https://www.404media.co/assets/dist/app.min.js?v=c2986781e8www.404media.co/assets/dist/app.min... https://www.404media.co/assets/dist/app.min.js?v=c2986781e8 — 200 — 37.7 KiB — 14 ms — h2https://www.404media.co/assets/dist/app.min.css?v=c2986781e8www.404media.co/assets/dist/app.min... https://www.404media.co/assets/dist/app.min.css?v=c2986781e8 — 200 — 20.0 KiB — 10 ms — h2https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700fonts.googleapis.com/css2?family=Sp... https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700 — 200 — 588 B — 119 ms — h2https://fonts.googleapis.com/css2?family=Inter:wght@400;700fonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@400;700 — 200 — 1.1 KiB — 116 ms — h2https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700fonts.googleapis.com/css2?family=Sp... https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700 — 200 — 592 B — 117 ms — h2https://www.404media.co/public/cards.min.css?v=c2986781e8www.404media.co/public/cards.min.cs... https://www.404media.co/public/cards.min.css?v=c2986781e8 — 200 — 7.7 KiB — 13 ms — h2https://www.404media.co/assets/images/img-placeholder-md.jpg?v=c2986781e8www.404media.co/assets/images/img-p... https://www.404media.co/assets/images/img-placeholder-md.jpg?v=c2986781e8 — 200 — 2.7 KiB — 23 ms — h2https://www.gravatar.com/avatar/87e07bd5bb3d003b0b135303a3e7f8b9?s=250&r=x&d=mpwww.gravatar.com/avatar/87e07bd5bb3... https://www.gravatar.com/avatar/87e07bd5bb3d003b0b135303a3e7f8b9?s=250&r=x&d=mp — 200 — 12.3 KiB — 33 ms — h2https://assets.outpost.pub/assets/v2/js/outpost-pub.jsassets.outpost.pub/assets/v2/js/out... https://assets.outpost.pub/assets/v2/js/outpost-pub.js — 200 — 16.3 KiB — 740 ms — http/1.1https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/portal.min.jscdn.jsdelivr.net/ghost/portal@~2.68... https://cdn.jsdelivr.net/ghost/portal@~2.68/umd/portal.min.js — 200 — 436.0 KiB — 66 ms — h2https://js.stripe.com/v3/js.stripe.com/v3/ https://js.stripe.com/v3/ — 200 — 226.4 KiB — 164 ms — h2https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/umd/sodo-search.min.jscdn.jsdelivr.net/ghost/sodo-search@... https://cdn.jsdelivr.net/ghost/sodo-search@~1.8/umd/sodo-search.min.js — 200 — 97.7 KiB — 55 ms — h2https://cdn.jsdelivr.net/ghost/announcement-bar@~1.1/umd/announcement-bar.min.jscdn.jsdelivr.net/ghost/announcement... https://cdn.jsdelivr.net/ghost/announcement-bar@~1.1/umd/announcement-bar.min.js — 200 — 44.2 KiB — 53 ms — h2https://www.404media.co/public/cards.min.js?v=c2986781e8www.404media.co/public/cards.min.js... https://www.404media.co/public/cards.min.js?v=c2986781e8 — 200 — 1.9 KiB — 9 ms — 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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 1824ms · 861KB · $6/mo
jsDelivr
CDN
Costly
Execution 485ms
Transfer 436 KB
Unused 23%
Monthly Cost $2/mo
www.404media.co
Other
Costly
Execution 445ms
Transfer 12 KB
Monthly Cost $1/mo
Unattributable
Other
Costly
Execution 253ms
Transfer 0 KB
Monthly Cost $1/mo
Stripe
Payment
Essential
Execution 209ms
Transfer 226 KB
Unused 73%
Monthly Cost $1/mo
assets.context.ly
Other
Optional
Execution 159ms
Transfer 7 KB
Monthly Cost $1/mo
jsDelivr
CDN
Optional
Execution 125ms
Transfer 98 KB
Unused 56%
Monthly Cost $0/mo
www.404media.co
Other
Optional
Execution 95ms
Transfer 38 KB
Unused 62%
Monthly Cost $0/mo
jsDelivr
CDN
Optional
Execution 52ms
Transfer 44 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • jsDelivr adds 485ms and costs ~$2/month
  • www.404media.co adds 445ms and costs ~$1/month
  • Unattributable adds 253ms and costs ~$1/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

jsDelivr takes 485ms 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

www.404media.co takes 445ms 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 253ms 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

73% of Stripe'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

56% of jsDelivr'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

62% of www.404media.co'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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