Skip to content
https://justpaste.it

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
52
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.
92
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.

1.12 s

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

5.32 s

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

1.68 s

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

0.056

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

3.38 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.

7.88 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 3 REVIEW 2 FIX
F
JS Execution Cost
Action
4177ms total JS execution
FIX
4177ms total JS execution
Warning::
https://justpaste.it/build/5.44b684b4.js: 854ms CPU time
Warning::
https://justpaste.it/build/editArticle.c3c13260.js: 845ms CPU time
Warning::
https://justpaste.it/build/2179.4bcb849f.js: 838ms CPU time
Warning::
https://justpaste.it/build/6568.ca598f5f.js: 783ms CPU time
Warning::
Unattributable: 374ms CPU time
Info::
Third-party scripts: 374ms (9% of total)

Main Thread Breakdown

Script Evaluation 58% Style & Layout 13% Other 12% Script Parsing & Compilation 12%
ScriptTotalScriptingParse/CompileParty
https://justpaste.it/build/5.44b684b4.js854ms424ms256ms1st
https://justpaste.it/build/editArticle.c3c13260.js845ms824ms21ms1st
https://justpaste.it/build/2179.4bcb849f.js838ms708ms36ms1st
https://justpaste.it/build/6568.ca598f5f.js783ms526ms7ms1st
Unattributable374ms8ms0ms3rd
https://justpaste.it/318ms7ms11ms1st
https://justpaste.it/build/827.7313dc7f.js109ms3ms105ms1st
https://justpaste.it/build/plugins/emoticons/js/emojis.js55ms26ms28ms1st
D
JS Bundles
Action
14 scripts, 460 KB unused
FIX
14 scripts, 460 KB unused
Warning::
https://justpaste.it/build/5.44b684b4.js: 247 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://justpaste.it/build/827.7313dc7f.js: 159 KB unused (99%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://justpaste.it/build/6315.0562b539.js: 27 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://justpaste.it/build/2179.4bcb849f.js: 26 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 460 KB
460 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://justpaste.it/build/5.44b684b4.js461 KB247 KB (54%)✓1st
https://justpaste.it/build/827.7313dc7f.js161 KB159 KB (99%)✓1st
https://justpaste.it/build/6315.0562b539.js35 KB27 KB (81%)✓1st
https://justpaste.it/build/2179.4bcb849f.js59 KB26 KB (44%)✓1st
https://justpaste.it/build/4423.07dfbf34.js5 KB—✓1st
https://justpaste.it/build/6568.ca598f5f.js15 KB—✓1st
https://justpaste.it/build/2488.2d4acc35.js19 KB—✓1st
https://justpaste.it/build/8100.8cfb65b0.js6 KB—✓1st
https://justpaste.it/build/editArticle.c3c13260.js27 KB—✓1st
https://justpaste.it/build/runtime.61ff66f8.js1 KB—✓1st

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 Budget
1.1 MB transferred, 26 requests
REVIEW
1.1 MB transferred, 26 requests
Info::
Page weighs 3.6 MB (1.1 MB transferred)
Warning::
JavaScript is 865 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 865 KB
Info::
26 HTTP requests
Info::
Estimated 0.22 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
26 requests
0.22 g CO2 per page load
JavaScript 865.0 KiB 79%
Fonts 131.3 KiB 12%
CSS 86.0 KiB 8%
Images 9.9 KiB 1%
HTML 3.3 KiB 0%
Other 1.5 KiB 0%
Other 726 B 0%
Other 579 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0, must-revalidate, private
REVIEW
max-age=0, must-revalidate, private
Info::
Cache-Control header is set
Got: max-age=0, must-revalidate, private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, must-revalidate, private

DirectiveValueMeaning
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
private—Only browser cache, not CDN/proxy
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 10 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (131 KB)
PASS
1 fonts (131 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

131 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 4.0 s 5.0 s FCP 1.1 s LCP 5.3 shttps://justpaste.it/build/fonts/bootstrap-icons.92ea18a8.woff2bootstrap-icons.92ea18a... https://justpaste.it/build/fonts/bootstrap-icons.92ea18a8.woff2 — 131.3 KiB — 24 ms — font-display: swap
bootstrap-icons.92ea18a... woff2 swap
Size 131 KB
Load time 24 ms
Start 490 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~66 KB and ~132 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
Page Weight Inventory
26 resources · 1.1 MB · 460 KB savings available
PASS
26 resources · 1.1 MB · 460 KB savings available
Warning::
Page weight 74 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~460 KB of savings available
Info::
1 resources over 200KB
26 resources · 1.1 MiB · 0 third-party 74.2 KiB over 1MB target
JavaScript 79% · 865.0 KiB
Font 12% · 131.3 KiB
CSS 8% · 86.0 KiB
Image 1% · 11.4 KiB
Document 0% · 3.3 KiB
Other 0% · 1.3 KiB

~459.8 KiB of savings available

Remove unused JavaScript: 459.8 KiB
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
26 requests over 1283ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 1.1 s LCP 5.3 shttps://justpaste.it// https://justpaste.it/ — 200 — 3.3 KiB — 151 ms — h2https://justpaste.it/build/editarticlestyles.d66dd344.css/build/editarticlestyles.d66dd344.c... https://justpaste.it/build/editarticlestyles.d66dd344.css — 200 — 7.2 KiB — 22 ms — h2https://justpaste.it/static/img/jp_logo_v3.svg/static/img/jp_logo_v3.svg https://justpaste.it/static/img/jp_logo_v3.svg — 200 — 9.9 KiB — 189 ms — h2https://justpaste.it/build/7337.eefa2517.css/build/7337.eefa2517.css https://justpaste.it/build/7337.eefa2517.css — 200 — 13.8 KiB — 30 ms — h2https://justpaste.it/build/global.c444bf34.css/build/global.c444bf34.css https://justpaste.it/build/global.c444bf34.css — 200 — 26.5 KiB — 46 ms — h2https://justpaste.it/build/827.7313dc7f.js/build/827.7313dc7f.js https://justpaste.it/build/827.7313dc7f.js — 200 — 160.6 KiB — 178 ms — h2https://justpaste.it/build/6315.0562b539.js/build/6315.0562b539.js https://justpaste.it/build/6315.0562b539.js — 200 — 34.7 KiB — 174 ms — h2https://justpaste.it/build/8097.f87620f1.js/build/8097.f87620f1.js https://justpaste.it/build/8097.f87620f1.js — 200 — 21.7 KiB — 116 ms — h2https://justpaste.it/build/4423.07dfbf34.js/build/4423.07dfbf34.js https://justpaste.it/build/4423.07dfbf34.js — 200 — 5.4 KiB — 116 ms — h2https://justpaste.it/build/2488.2d4acc35.js/build/2488.2d4acc35.js https://justpaste.it/build/2488.2d4acc35.js — 200 — 19.3 KiB — 117 ms — h2https://justpaste.it/build/6568.ca598f5f.js/build/6568.ca598f5f.js https://justpaste.it/build/6568.ca598f5f.js — 200 — 14.7 KiB — 120 ms — h2https://justpaste.it/build/5.44b684b4.js/build/5.44b684b4.js https://justpaste.it/build/5.44b684b4.js — 200 — 460.8 KiB — 161 ms — h2https://justpaste.it/build/8100.8cfb65b0.js/build/8100.8cfb65b0.js https://justpaste.it/build/8100.8cfb65b0.js — 200 — 6.3 KiB — 129 ms — h2https://justpaste.it/build/editArticle.c3c13260.js/build/editArticle.c3c13260.js https://justpaste.it/build/editArticle.c3c13260.js — 200 — 26.7 KiB — 134 ms — h2https://justpaste.it/site.webmanifest/site.webmanifest https://justpaste.it/site.webmanifest — 200 — 726 B — 83 ms — h2https://justpaste.it/build/runtime.61ff66f8.js/build/runtime.61ff66f8.js https://justpaste.it/build/runtime.61ff66f8.js — 200 — 1.3 KiB — 132 ms — h2https://justpaste.it/build/2179.4bcb849f.js/build/2179.4bcb849f.js https://justpaste.it/build/2179.4bcb849f.js — 200 — 58.7 KiB — 145 ms — h2https://justpaste.it/build/1083.3be44e69.js/build/1083.3be44e69.js https://justpaste.it/build/1083.3be44e69.js — 200 — 20.8 KiB — 146 ms — h2https://justpaste.it/build/mainpanelwidget.8f73f68c.js/build/mainpanelwidget.8f73f68c.js https://justpaste.it/build/mainpanelwidget.8f73f68c.js — 200 — 3.8 KiB — 140 ms — h2https://justpaste.it/build/fonts/bootstrap-icons.92ea18a8.woff2/build/fonts/bootstrap-icons.92ea18... https://justpaste.it/build/fonts/bootstrap-icons.92ea18a8.woff2 — 200 — 131.3 KiB — 24 ms — h2https://justpaste.it/api/v1/new-article/api/v1/new-article https://justpaste.it/api/v1/new-article — 200 — 579 B — 180 ms — h2https://justpaste.it/favicon.svg/favicon.svg https://justpaste.it/favicon.svg — 200 — 1.5 KiB — 21 ms — h2https://justpaste.it/favicon.svg/favicon.svg https://justpaste.it/favicon.svg — 200 — 0 B — 3 ms — h2https://justpaste.it/build/skins/ui/oxide/content.css/build/skins/ui/oxide/content.css https://justpaste.it/build/skins/ui/oxide/content.css — 200 — 7.0 KiB — 23 ms — h2https://justpaste.it/build/editor.eb6b4e90.css/build/editor.eb6b4e90.css https://justpaste.it/build/editor.eb6b4e90.css — 200 — 31.5 KiB — 35 ms — h2https://justpaste.it/build/plugins/emoticons/js/emojis.js/build/plugins/emoticons/js/emojis.... https://justpaste.it/build/plugins/emoticons/js/emojis.js — 200 — 30.2 KiB — 34 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
9% of JavaScript execution is third-party
First-party Third-party 374ms · 0KB · €4/mo
Unattributable
Other
Costly
Execution 374ms
Transfer 0 KB
Monthly Cost €4/mo

These scripts may cost more than they're worth

  • Unattributable adds 374ms and costs ~€4/month

Unattributable takes 374ms 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

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.

Send Feedback