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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
5
REVIEW
1
PASS
7
INFO
2

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

Mobile Desktop
77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
94
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

921 ms

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

3.13 s

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

174 ms

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

0.000

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

1.14 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.

3.18 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
15
7 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
3.6 MB transferred, 34 requests
FIX
3.6 MB transferred, 34 requests
Warning::
Page weighs 8.8 MB (3.6 MB transferred)
Warning::
Images are 1.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.8 MB
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
CSS is 319 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 319 KB
Info::
34 HTTP requests
Info::
Estimated 0.76 g CO2 per page load
3.6 MB / 2.4 MB budget
3.6 MB transferred
34 requests
0.76 g CO2 per page load
Images 1.8 MiB 50%
JavaScript 1.4 MiB 40%
CSS 319.5 KiB 9%
Fonts 32.1 KiB 1%
HTML 9.2 KiB 0%
Other 8.4 KiB 0%
Other 965 B 0%
Other 435 B 0%
Other 162 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

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 (3.6 MiB of 3.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
5 scripts, 938 KB unused
FIX
5 scripts, 938 KB unused
Warning::
https://www.pubpub.org/dist/vendor.53f35129c103d92...: 728 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.pubpub.org/dist/main.b5bf41f155d1784ec...: 210 KB unused (78%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 938 KB
938 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.pubpub.org/dist/vendor.53f35129c103d920c9ce.bundle.js1191 KB728 KB (61%)✓3rd
https://www.pubpub.org/dist/main.b5bf41f155d1784ec954.js271 KB210 KB (78%)✓3rd
https://polyfill-fastly.io/v3/polyfill.min.js?features=default,fetch,HTMLCanvasElement.prototype.toBlob,Node.prototype.contains,Array.prototype.find,Array.from,Number.isNaN,Object.assign,Object.entries,Object.values,Promise,requestIdleCallback,String.prototype.includes,URL,URLSearchParams0 KB—✓3rd
https://www.pubpub.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js1 KB—✓3rd
https://www.pubpub.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?12 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

F
Page Weight Inventory
Action
34 resources · 3.6 MB · 938 KB savings available
FIX
34 resources · 3.6 MB · 938 KB savings available
Warning::
Page weight 2.6 MB over 1MB target
Got: 3.6 MB Expected: ≤ 1 MB
Info::
~938 KB of savings available
Warning::
33 third-party resources (100% of weight)
Info::
7 resources over 200KB
34 resources · 3.6 MiB · 33 third-party 2.6 MiB over 1MB target
Image 50% · 1.8 MiB
JavaScript 40% · 1.4 MiB
CSS 9% · 319.5 KiB
Font 1% · 32.1 KiB
Document 0% · 9.2 KiB
Other 0% · 1.8 KiB

~937.9 KiB of savings available

Remove unused JavaScript: 937.9 KiB
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
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://www.pubpub.org/static/logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.pubpub.org/static/kfMini.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 1.8 MB
0 oversized -0 KB
17 legacy format
2 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

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

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+
JS Execution Cost
497ms total JS execution
PASS
497ms total JS execution
Info::
https://www.pubpub.org/dist/main.b5bf41f155d1784ec...: 225ms CPU time
Info::
https://www.pubpub.org/: 121ms CPU time
Info::
https://www.pubpub.org/dist/vendor.53f35129c103d92...: 100ms CPU time
Info::
Unattributable: 50ms CPU time
Warning::
Third-party scripts: 497ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Script Parsing & Compilation 21% Style & Layout 18% Other 11% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.pubpub.org/dist/main.b5bf41f155d1784ec954.js225ms198ms26ms3rd
https://www.pubpub.org/121ms6ms0ms3rd
https://www.pubpub.org/dist/vendor.53f35129c103d920c9ce.bundle.js100ms7ms90ms3rd
Unattributable50ms2ms0ms3rd
A+
Font Loading
1 fonts (32 KB)
PASS
1 fonts (32 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

32 KB total

Render-blocking

0

of 1

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 921 ms LCP 3.1 shttps://assets.pubpub.org/_fonts/8da286c6/outfit-latin-wght-normal.woff2outfit-latin-wght-norma... https://assets.pubpub.org/_fonts/8da286c6/outfit-latin-wght-normal.woff2 — 32.1 KiB — 35 ms — font-display: swap
outfit-latin-wght-norma... woff2 swap
Size 32 KB
Load time 35 ms
Start 467 ms
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
34 requests over 969ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 921 ms LCP 3.1 shttps://pubpub.org// https://pubpub.org/ — 301 — 95 B — 62 ms — h2https://www.pubpub.org/www.pubpub.org/ https://www.pubpub.org/ — 200 — 9.2 KiB — 202 ms — h2https://assets.pubpub.org/_fonts/8da286c6/fonts.cssassets.pubpub.org/_fonts/8da286c6/f... https://assets.pubpub.org/_fonts/8da286c6/fonts.css — 200 — 236.7 KiB — 73 ms — h2https://www.pubpub.org/dist/main.94539bdef5da7a49dfd9.csswww.pubpub.org/dist/main.94539bdef5... https://www.pubpub.org/dist/main.94539bdef5da7a49dfd9.css — 200 — 82.8 KiB — 50 ms — h2https://www.pubpub.org/static/logo.pngwww.pubpub.org/static/logo.png https://www.pubpub.org/static/logo.png — 200 — 2.8 KiB — 24 ms — h2https://www.pubpub.org/static/landing/authoring.pngwww.pubpub.org/static/landing/autho... https://www.pubpub.org/static/landing/authoring.png — 200 — 134.8 KiB — 85 ms — h2https://www.pubpub.org/static/landing/importing.pngwww.pubpub.org/static/landing/impor... https://www.pubpub.org/static/landing/importing.png — 200 — 276.6 KiB — 95 ms — h2https://www.pubpub.org/static/landing/multimedia.pngwww.pubpub.org/static/landing/multi... https://www.pubpub.org/static/landing/multimedia.png — 200 — 111.5 KiB — 92 ms — h2https://www.pubpub.org/static/landing/hdsr.pngwww.pubpub.org/static/landing/hdsr.... https://www.pubpub.org/static/landing/hdsr.png — 200 — 32.2 KiB — 92 ms — h2https://polyfill-fastly.io/v3/polyfill.min.js?features=default,fetch,HTMLCanvasElement.prototype.toBlob,Node.prototype.contains,Array.prototype.find,Array.from,Number.isNaN,Object.assign,Object.entries,Object.values,Promise,requestIdleCallback,String.prototype.includes,URL,URLSearchParamspolyfill-fastly.io/v3/polyfill.min.... https://polyfill-fastly.io/v3/polyfill.min.js?features=default,fetch,HTMLCanvasElement.prototype.toBlob,Node.prototype.contains,Array.prototype.find,Array.from,Number.isNaN,Object.assign,Object.entries,Object.values,Promise,requestIdleCallback,String.prototype.includes,URL,URLSearchParams — 200 — 355 B — 10 ms — h2https://www.pubpub.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.jswww.pubpub.org/cdn-cgi/scripts/5c5d... https://www.pubpub.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 767 B — 73 ms — h2https://www.pubpub.org/dist/vendor.53f35129c103d920c9ce.bundle.jswww.pubpub.org/dist/vendor.53f35129... https://www.pubpub.org/dist/vendor.53f35129c103d920c9ce.bundle.js — 200 — 1.2 MiB — 101 ms — h2https://www.pubpub.org/dist/main.b5bf41f155d1784ec954.jswww.pubpub.org/dist/main.b5bf41f155... https://www.pubpub.org/dist/main.b5bf41f155d1784ec954.js — 200 — 270.6 KiB — 54 ms — h2https://www.pubpub.org/static/landing/frankenbook.pngwww.pubpub.org/static/landing/frank... https://www.pubpub.org/static/landing/frankenbook.png — 200 — 46.4 KiB — 34 ms — h2https://www.pubpub.org/static/landing/collective.pngwww.pubpub.org/static/landing/colle... https://www.pubpub.org/static/landing/collective.png — 200 — 74.1 KiB — 42 ms — h2https://www.pubpub.org/static/landing/serc.pngwww.pubpub.org/static/landing/serc.... https://www.pubpub.org/static/landing/serc.png — 200 — 122.5 KiB — 43 ms — h2https://www.pubpub.org/static/landing/contours.pngwww.pubpub.org/static/landing/conto... https://www.pubpub.org/static/landing/contours.png — 200 — 44.3 KiB — 39 ms — h2https://www.pubpub.org/static/landing/fermentology.pngwww.pubpub.org/static/landing/ferme... https://www.pubpub.org/static/landing/fermentology.png — 200 — 23.7 KiB — 28 ms — h2https://www.pubpub.org/static/landing/gafs.pngwww.pubpub.org/static/landing/gafs.... https://www.pubpub.org/static/landing/gafs.png — 200 — 278.7 KiB — 36 ms — h2https://www.pubpub.org/static/landing/pgej.pngwww.pubpub.org/static/landing/pgej.... https://www.pubpub.org/static/landing/pgej.png — 200 — 69.0 KiB — 31 ms — h2https://www.pubpub.org/static/landing/arch.pngwww.pubpub.org/static/landing/arch.... https://www.pubpub.org/static/landing/arch.png — 200 — 213.6 KiB — 27 ms — h2https://www.pubpub.org/static/logoBlack.svgwww.pubpub.org/static/logoBlack.svg https://www.pubpub.org/static/logoBlack.svg — 200 — 3.5 KiB — 27 ms — h2https://www.pubpub.org/static/kfMini.svgwww.pubpub.org/static/kfMini.svg https://www.pubpub.org/static/kfMini.svg — 200 — 5.8 KiB — 24 ms — h2https://www.pubpub.org/static/landing/headerbg.pngwww.pubpub.org/static/landing/heade... https://www.pubpub.org/static/landing/headerbg.png — 200 — 378.2 KiB — 37 ms — h2https://www.pubpub.org/static/landing/createbg.pngwww.pubpub.org/static/landing/creat... https://www.pubpub.org/static/landing/createbg.png — 200 — 31.5 KiB — 30 ms — h2https://assets.pubpub.org/_fonts/8da286c6/outfit-latin-wght-normal.woff2assets.pubpub.org/_fonts/8da286c6/o... https://assets.pubpub.org/_fonts/8da286c6/outfit-latin-wght-normal.woff2 — 200 — 32.1 KiB — 35 ms — h2https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4o31718.ingest.sentry.io/api/4504532... https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4 — 200 — 56 B — 87 ms — h2https://www.pubpub.org/api/evwww.pubpub.org/api/ev https://www.pubpub.org/api/ev — 204 — 162 B — 160 ms — h2https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4o31718.ingest.sentry.io/api/4504532... https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4 — 200 — 281 B — 47 ms — h2https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4o31718.ingest.sentry.io/api/4504532... https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4 — 200 — 98 B — 47 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 921 ms LCP 3.1 shttps://pubpub.org// https://pubpub.org/ — 301 — 95 B — 62 ms — h2https://www.pubpub.org/www.pubpub.org/ https://www.pubpub.org/ — 200 — 9.2 KiB — 202 ms — h2https://assets.pubpub.org/_fonts/8da286c6/fonts.cssassets.pubpub.org/_fonts/8da286c6/f... https://assets.pubpub.org/_fonts/8da286c6/fonts.css — 200 — 236.7 KiB — 73 ms — h2https://www.pubpub.org/dist/main.94539bdef5da7a49dfd9.csswww.pubpub.org/dist/main.94539bdef5... https://www.pubpub.org/dist/main.94539bdef5da7a49dfd9.css — 200 — 82.8 KiB — 50 ms — h2https://www.pubpub.org/static/logo.pngwww.pubpub.org/static/logo.png https://www.pubpub.org/static/logo.png — 200 — 2.8 KiB — 24 ms — h2https://www.pubpub.org/static/landing/authoring.pngwww.pubpub.org/static/landing/autho... https://www.pubpub.org/static/landing/authoring.png — 200 — 134.8 KiB — 85 ms — h2https://www.pubpub.org/static/landing/importing.pngwww.pubpub.org/static/landing/impor... https://www.pubpub.org/static/landing/importing.png — 200 — 276.6 KiB — 95 ms — h2https://www.pubpub.org/static/landing/multimedia.pngwww.pubpub.org/static/landing/multi... https://www.pubpub.org/static/landing/multimedia.png — 200 — 111.5 KiB — 92 ms — h2https://www.pubpub.org/static/landing/hdsr.pngwww.pubpub.org/static/landing/hdsr.... https://www.pubpub.org/static/landing/hdsr.png — 200 — 32.2 KiB — 92 ms — h2https://polyfill-fastly.io/v3/polyfill.min.js?features=default,fetch,HTMLCanvasElement.prototype.toBlob,Node.prototype.contains,Array.prototype.find,Array.from,Number.isNaN,Object.assign,Object.entries,Object.values,Promise,requestIdleCallback,String.prototype.includes,URL,URLSearchParamspolyfill-fastly.io/v3/polyfill.min.... https://polyfill-fastly.io/v3/polyfill.min.js?features=default,fetch,HTMLCanvasElement.prototype.toBlob,Node.prototype.contains,Array.prototype.find,Array.from,Number.isNaN,Object.assign,Object.entries,Object.values,Promise,requestIdleCallback,String.prototype.includes,URL,URLSearchParams — 200 — 355 B — 10 ms — h2https://www.pubpub.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.jswww.pubpub.org/cdn-cgi/scripts/5c5d... https://www.pubpub.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 767 B — 73 ms — h2https://www.pubpub.org/dist/vendor.53f35129c103d920c9ce.bundle.jswww.pubpub.org/dist/vendor.53f35129... https://www.pubpub.org/dist/vendor.53f35129c103d920c9ce.bundle.js — 200 — 1.2 MiB — 101 ms — h2https://www.pubpub.org/dist/main.b5bf41f155d1784ec954.jswww.pubpub.org/dist/main.b5bf41f155... https://www.pubpub.org/dist/main.b5bf41f155d1784ec954.js — 200 — 270.6 KiB — 54 ms — h2https://www.pubpub.org/static/landing/frankenbook.pngwww.pubpub.org/static/landing/frank... https://www.pubpub.org/static/landing/frankenbook.png — 200 — 46.4 KiB — 34 ms — h2https://www.pubpub.org/static/landing/collective.pngwww.pubpub.org/static/landing/colle... https://www.pubpub.org/static/landing/collective.png — 200 — 74.1 KiB — 42 ms — h2https://www.pubpub.org/static/landing/serc.pngwww.pubpub.org/static/landing/serc.... https://www.pubpub.org/static/landing/serc.png — 200 — 122.5 KiB — 43 ms — h2https://www.pubpub.org/static/landing/contours.pngwww.pubpub.org/static/landing/conto... https://www.pubpub.org/static/landing/contours.png — 200 — 44.3 KiB — 39 ms — h2https://www.pubpub.org/static/landing/fermentology.pngwww.pubpub.org/static/landing/ferme... https://www.pubpub.org/static/landing/fermentology.png — 200 — 23.7 KiB — 28 ms — h2https://www.pubpub.org/static/landing/gafs.pngwww.pubpub.org/static/landing/gafs.... https://www.pubpub.org/static/landing/gafs.png — 200 — 278.7 KiB — 36 ms — h2https://www.pubpub.org/static/landing/pgej.pngwww.pubpub.org/static/landing/pgej.... https://www.pubpub.org/static/landing/pgej.png — 200 — 69.0 KiB — 31 ms — h2https://www.pubpub.org/static/landing/arch.pngwww.pubpub.org/static/landing/arch.... https://www.pubpub.org/static/landing/arch.png — 200 — 213.6 KiB — 27 ms — h2https://www.pubpub.org/static/logoBlack.svgwww.pubpub.org/static/logoBlack.svg https://www.pubpub.org/static/logoBlack.svg — 200 — 3.5 KiB — 27 ms — h2https://www.pubpub.org/static/kfMini.svgwww.pubpub.org/static/kfMini.svg https://www.pubpub.org/static/kfMini.svg — 200 — 5.8 KiB — 24 ms — h2https://www.pubpub.org/static/landing/headerbg.pngwww.pubpub.org/static/landing/heade... https://www.pubpub.org/static/landing/headerbg.png — 200 — 378.2 KiB — 37 ms — h2https://www.pubpub.org/static/landing/createbg.pngwww.pubpub.org/static/landing/creat... https://www.pubpub.org/static/landing/createbg.png — 200 — 31.5 KiB — 30 ms — h2https://assets.pubpub.org/_fonts/8da286c6/outfit-latin-wght-normal.woff2assets.pubpub.org/_fonts/8da286c6/o... https://assets.pubpub.org/_fonts/8da286c6/outfit-latin-wght-normal.woff2 — 200 — 32.1 KiB — 35 ms — h2https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4o31718.ingest.sentry.io/api/4504532... https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4 — 200 — 56 B — 87 ms — h2https://www.pubpub.org/api/evwww.pubpub.org/api/ev https://www.pubpub.org/api/ev — 204 — 162 B — 160 ms — h2https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4o31718.ingest.sentry.io/api/4504532... https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4 — 200 — 281 B — 47 ms — h2https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4o31718.ingest.sentry.io/api/4504532... https://o31718.ingest.sentry.io/api/4504532925349888/envelope/?sentry_key=28b2ae6e574a49dfbc894d8793b36f0d&sentry_version=7&sentry_client=sentry.javascript.react%2F7.120.4 — 200 — 98 B — 47 ms — h2https://www.pubpub.org/cdn-cgi/challenge-platform/scripts/jsd/main.jswww.pubpub.org/cdn-cgi/challenge-pl... https://www.pubpub.org/cdn-cgi/challenge-platform/scripts/jsd/main.js — 302 — 164 B — 20 ms — h2https://www.pubpub.org/favicon.pngwww.pubpub.org/favicon.png https://www.pubpub.org/favicon.png — 200 — 8.1 KiB — 81 ms — h2https://www.pubpub.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?www.pubpub.org/cdn-cgi/challenge-pl... https://www.pubpub.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? — 200 — 12.3 KiB — 22 ms — h2https://www.pubpub.org/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.15003100145269122:1776899610:ocN79iLeoMzLIrbO7RufIK3kxf6HJgAQAGMI3HucTfc/9f0883601e6848d2www.pubpub.org/cdn-cgi/challenge-pl... https://www.pubpub.org/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.15003100145269122:1776899610:ocN79iLeoMzLIrbO7RufIK3kxf6HJgAQAGMI3HucTfc/9f0883601e6848d2 — 200 — 965 B — 38 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 497ms · 1471KB · $7/mo
www.pubpub.org
Other
Costly
Execution 225ms
Transfer 271 KB
Unused 78%
Monthly Cost $3/mo
www.pubpub.org
Other
Optional
Execution 121ms
Transfer 9 KB
Monthly Cost $2/mo
www.pubpub.org
Other
Optional
Execution 100ms
Transfer 1191 KB
Unused 61%
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 50ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.pubpub.org adds 225ms and costs ~$3/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

www.pubpub.org takes 225ms 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

78% of www.pubpub.org'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

61% of www.pubpub.org'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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