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https://bitcoin.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

723 ms

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

870 ms

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

40 ms

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

0.021

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

779 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.00 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
9 PASS 3 REVIEW 1 FIX
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://bitcoin.org/img/icons/ico_developers.svg?1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcoin.org/img/icons/ico_arrow_down.svg?1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcoin.org/img/icons/logo-footer.svg?1776... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcoin.org/img/icons/ico_business.svg?177... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcoin.org/img/icons/ico_individuals.svg?... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcoin.org/img/icons/ico_close.svg?177668... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 138 KB
0 oversized -0 KB
17 legacy format
6 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

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

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

C
JS Execution Cost
Action
1653ms total JS execution
REVIEW
1653ms total JS execution
Warning::
https://bitcoin.org/js/lottie-player.js?1776683281: 1399ms CPU time
Info::
Unattributable: 172ms CPU time
Info::
https://bitcoin.org/en/: 82ms CPU time
Info::
Third-party scripts: 172ms (10% of total)

Main Thread Breakdown

Script Evaluation 75% Other 16% Garbage Collection 4%
ScriptTotalScriptingParse/CompileParty
https://bitcoin.org/js/lottie-player.js?17766832811399ms1238ms7ms1st
Unattributable172ms2ms0ms3rd
https://bitcoin.org/en/82ms10ms1ms1st
B
JS Bundles
10 scripts, 112 KB unused
REVIEW
10 scripts, 112 KB unused
Warning::
https://bitcoin.org/js/jquery/jquery-ui.min.js: 57 KB unused (90%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bitcoin.org/js/lottie-player.js?1776683281: 55 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bitcoin.org/js/main.js?1776683281: unminified — 2 KB could be saved
Info::
Total unused JavaScript: 112 KB
112 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://bitcoin.org/js/jquery/jquery-ui.min.js63 KB57 KB (90%)✓1st
https://bitcoin.org/js/lottie-player.js?177668328196 KB55 KB (58%)✓1st
https://bitcoin.org/js/base.js?17766832814 KB—✓1st
https://bitcoin.org/js/main.js?17766832819 KB—✗1st
https://bitcoin.org/js/jquery/jquery-1.11.2.min.js33 KB—✓1st
https://bitcoin.org/js/jquery/jquery.qrcode.min.js5 KB—✓1st
https://bitcoin.org/js/cookieconsent/cookieconsent.js?17766832814 KB—✓1st
https://bitcoin.org/js/analytics.js1 KB—✓1st
https://www.google-analytics.com/analytics.js21 KB—✓3rd
https://www.googletagmanager.com/gtag/js?id=G-G6FD47421W&cx=c&_slc=10 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

A
Page Weight Budget
949 KB transferred, 46 requests
PASS
949 KB transferred, 46 requests
Info::
Page weighs 5.8 MB (949 KB transferred)
Info::
46 HTTP requests
Info::
Estimated 0.19 g CO2 per page load
949 KB / 2.4 MB budget
949 KB transferred
46 requests
0.19 g CO2 per page load
Other 469.7 KiB 50%
JavaScript 236.4 KiB 25%
Images 138.2 KiB 15%
Fonts 65.3 KiB 7%
CSS 30.4 KiB 3%
HTML 6.3 KiB 1%
Other 2.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
2% third-party, 0 ms blocking
PASS
2% third-party, 0 ms blocking
Info::
Third-party code accounts for 2% of page weight (21.4 KiB of 948.7 KiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-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+
Font Loading
3 fonts (65 KB)
PASS
3 fonts (65 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

65 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 500 ms 1.0 s FCP 723 ms LCP 870 mshttps://bitcoin.org/font/titillium/TitilliumWeb-Regular.woff2TitilliumWeb-Regular.woff2 https://bitcoin.org/font/titillium/TitilliumWeb-Regular.woff2 — 22.3 KiB — 27 ms — font-display: swaphttps://bitcoin.org/font/titillium/TitilliumWeb-SemiBold.woff2TitilliumWeb-SemiBold.w... https://bitcoin.org/font/titillium/TitilliumWeb-SemiBold.woff2 — 22.1 KiB — 27 ms — font-display: swaphttps://bitcoin.org/font/titillium/TitilliumWeb-Bold.woff2TitilliumWeb-Bold.woff2 https://bitcoin.org/font/titillium/TitilliumWeb-Bold.woff2 — 20.9 KiB — 34 ms — font-display: swap
TitilliumWeb-Regular.woff2 woff2 swap
Size 22 KB
Load time 27 ms
Start 592 ms
Risk FOUT — text flashes from fallback to web font
TitilliumWeb-SemiBold.w... woff2 swap
Size 22 KB
Load time 27 ms
Start 592 ms
Risk FOUT — text flashes from fallback to web font
TitilliumWeb-Bold.woff2 woff2 swap
Size 21 KB
Load time 34 ms
Start 592 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+
Page Weight Inventory
46 resources · 949 KB · 112 KB savings available
PASS
46 resources · 949 KB · 112 KB savings available
Info::
Within 1MB page-weight target
Got: 949 KB
Info::
~112 KB of savings available
Info::
3 third-party resources (2% of weight)
Info::
1 resources over 200KB
46 resources · 948.7 KiB · 3 third-party Within 1MB page-weight target
Other 50% · 469.7 KiB
JavaScript 25% · 236.4 KiB
Image 15% · 140.0 KiB
Font 7% · 65.3 KiB
CSS 3% · 30.4 KiB
Document 1% · 6.9 KiB

~111.9 KiB of savings available

Remove unused JavaScript: 111.9 KiB
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
46 requests over 6628ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 723 ms LCP 870 mshttps://bitcoin.org// https://bitcoin.org/ — 302 — 592 B — 199 ms — h3https://bitcoin.org/en//en/ https://bitcoin.org/en/ — 200 — 6.3 KiB — 180 ms — h3https://bitcoin.org/css/font-awesome-4.4.0/css/font-awesome.min.css/css/font-awesome-4.4.0/css/font-aw... https://bitcoin.org/css/font-awesome-4.4.0/css/font-awesome.min.css — 200 — 6.5 KiB — 79 ms — h3https://bitcoin.org/css/main.css?1776683281/css/main.css?1776683281 https://bitcoin.org/css/main.css?1776683281 — 200 — 22.5 KiB — 77 ms — h3https://bitcoin.org/js/base.js?1776683281/js/base.js?1776683281 https://bitcoin.org/js/base.js?1776683281 — 200 — 4.5 KiB — 76 ms — h3https://bitcoin.org/js/main.js?1776683281/js/main.js?1776683281 https://bitcoin.org/js/main.js?1776683281 — 200 — 8.8 KiB — 84 ms — h3https://bitcoin.org/js/lottie-player.js?1776683281/js/lottie-player.js?1776683281 https://bitcoin.org/js/lottie-player.js?1776683281 — 200 — 96.2 KiB — 115 ms — h3https://bitcoin.org/js/jquery/jquery-1.11.2.min.js/js/jquery/jquery-1.11.2.min.js https://bitcoin.org/js/jquery/jquery-1.11.2.min.js — 200 — 33.0 KiB — 101 ms — h3https://bitcoin.org/js/jquery/jquery-ui.min.js/js/jquery/jquery-ui.min.js https://bitcoin.org/js/jquery/jquery-ui.min.js — 200 — 63.2 KiB — 109 ms — h3https://bitcoin.org/js/jquery/jquery.qrcode.min.js/js/jquery/jquery.qrcode.min.js https://bitcoin.org/js/jquery/jquery.qrcode.min.js — 200 — 5.2 KiB — 79 ms — h3https://bitcoin.org/js/cookieconsent/cookieconsent.js?1776683281/js/cookieconsent/cookieconsent.js?... https://bitcoin.org/js/cookieconsent/cookieconsent.js?1776683281 — 200 — 3.7 KiB — 77 ms — h3https://bitcoin.org/img/icons/ico_close.svg?1776683281/img/icons/ico_close.svg?1776683281 https://bitcoin.org/img/icons/ico_close.svg?1776683281 — 200 — 1.1 KiB — 66 ms — h3https://bitcoin.org/img/icons/logotop.svg?1776683281/img/icons/logotop.svg?1776683281 https://bitcoin.org/img/icons/logotop.svg?1776683281 — 200 — 3.4 KiB — 73 ms — h3https://bitcoin.org/img/animations/herecomesbitcoin/hungry_right_hand.svg?1776683281/img/animations/herecomesbitcoin/hu... https://bitcoin.org/img/animations/herecomesbitcoin/hungry_right_hand.svg?1776683281 — 200 — 2.0 KiB — 27 ms — h3https://bitcoin.org/img/animations/herecomesbitcoin/hungry_left_hand.svg?1776683281/img/animations/herecomesbitcoin/hu... https://bitcoin.org/img/animations/herecomesbitcoin/hungry_left_hand.svg?1776683281 — 200 — 1.9 KiB — 29 ms — h3https://bitcoin.org/img/icons/ico_individuals.svg?1776683281/img/icons/ico_individuals.svg?1776... https://bitcoin.org/img/icons/ico_individuals.svg?1776683281 — 200 — 1.7 KiB — 25 ms — h3https://bitcoin.org/img/icons/ico_business.svg?1776683281/img/icons/ico_business.svg?1776683... https://bitcoin.org/img/icons/ico_business.svg?1776683281 — 200 — 1.7 KiB — 25 ms — h3https://bitcoin.org/img/icons/ico_developers.svg?1776683281/img/icons/ico_developers.svg?17766... https://bitcoin.org/img/icons/ico_developers.svg?1776683281 — 200 — 2.1 KiB — 24 ms — h3https://bitcoin.org/img/icons/ico_arrow_down.svg?1776683281/img/icons/ico_arrow_down.svg?17766... https://bitcoin.org/img/icons/ico_arrow_down.svg?1776683281 — 200 — 1.3 KiB — 32 ms — h3https://bitcoin.org/img/icons/main_ico_instant.svg?1776683281/img/icons/main_ico_instant.svg?177... https://bitcoin.org/img/icons/main_ico_instant.svg?1776683281 — 200 — 1.3 KiB — 31 ms — h3https://bitcoin.org/img/icons/main_ico_worldwide.svg?1776683281/img/icons/main_ico_worldwide.svg?1... https://bitcoin.org/img/icons/main_ico_worldwide.svg?1776683281 — 200 — 3.7 KiB — 31 ms — h3https://bitcoin.org/img/icons/main_ico_lowfee.svg?1776683281/img/icons/main_ico_lowfee.svg?1776... https://bitcoin.org/img/icons/main_ico_lowfee.svg?1776683281 — 200 — 2.5 KiB — 31 ms — h3https://bitcoin.org/img/icons/logo-footer.svg?1776683281/img/icons/logo-footer.svg?17766832... https://bitcoin.org/img/icons/logo-footer.svg?1776683281 — 200 — 6.2 KiB — 31 ms — h3https://bitcoin.org/js/analytics.js/js/analytics.js https://bitcoin.org/js/analytics.js — 200 — 933 B — 26 ms — h3https://bitcoin.org/json/hungry.json/json/hungry.json https://bitcoin.org/json/hungry.json — 200 — 30.6 KiB — 977 ms — h3https://bitcoin.org/json/hungry.json/json/hungry.json https://bitcoin.org/json/hungry.json — 200 — 0 B — 978 ms — h3https://bitcoin.org/json/flower_heads.json/json/flower_heads.json https://bitcoin.org/json/flower_heads.json — 200 — 303.3 KiB — 6.1 s — h3https://bitcoin.org/json/flower_heads.json/json/flower_heads.json https://bitcoin.org/json/flower_heads.json — 200 — 0 B — 6.1 s — h3https://bitcoin.org/json/fairy.json/json/fairy.json https://bitcoin.org/json/fairy.json — 200 — 63.9 KiB — 2.4 s — h3https://bitcoin.org/json/fairy.json/json/fairy.json https://bitcoin.org/json/fairy.json — 200 — 0 B — 2.4 s — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 723 ms LCP 870 mshttps://bitcoin.org// https://bitcoin.org/ — 302 — 592 B — 199 ms — h3https://bitcoin.org/en//en/ https://bitcoin.org/en/ — 200 — 6.3 KiB — 180 ms — h3https://bitcoin.org/css/font-awesome-4.4.0/css/font-awesome.min.css/css/font-awesome-4.4.0/css/font-aw... https://bitcoin.org/css/font-awesome-4.4.0/css/font-awesome.min.css — 200 — 6.5 KiB — 79 ms — h3https://bitcoin.org/css/main.css?1776683281/css/main.css?1776683281 https://bitcoin.org/css/main.css?1776683281 — 200 — 22.5 KiB — 77 ms — h3https://bitcoin.org/js/base.js?1776683281/js/base.js?1776683281 https://bitcoin.org/js/base.js?1776683281 — 200 — 4.5 KiB — 76 ms — h3https://bitcoin.org/js/main.js?1776683281/js/main.js?1776683281 https://bitcoin.org/js/main.js?1776683281 — 200 — 8.8 KiB — 84 ms — h3https://bitcoin.org/js/lottie-player.js?1776683281/js/lottie-player.js?1776683281 https://bitcoin.org/js/lottie-player.js?1776683281 — 200 — 96.2 KiB — 115 ms — h3https://bitcoin.org/js/jquery/jquery-1.11.2.min.js/js/jquery/jquery-1.11.2.min.js https://bitcoin.org/js/jquery/jquery-1.11.2.min.js — 200 — 33.0 KiB — 101 ms — h3https://bitcoin.org/js/jquery/jquery-ui.min.js/js/jquery/jquery-ui.min.js https://bitcoin.org/js/jquery/jquery-ui.min.js — 200 — 63.2 KiB — 109 ms — h3https://bitcoin.org/js/jquery/jquery.qrcode.min.js/js/jquery/jquery.qrcode.min.js https://bitcoin.org/js/jquery/jquery.qrcode.min.js — 200 — 5.2 KiB — 79 ms — h3https://bitcoin.org/js/cookieconsent/cookieconsent.js?1776683281/js/cookieconsent/cookieconsent.js?... https://bitcoin.org/js/cookieconsent/cookieconsent.js?1776683281 — 200 — 3.7 KiB — 77 ms — h3https://bitcoin.org/img/icons/ico_close.svg?1776683281/img/icons/ico_close.svg?1776683281 https://bitcoin.org/img/icons/ico_close.svg?1776683281 — 200 — 1.1 KiB — 66 ms — h3https://bitcoin.org/img/icons/logotop.svg?1776683281/img/icons/logotop.svg?1776683281 https://bitcoin.org/img/icons/logotop.svg?1776683281 — 200 — 3.4 KiB — 73 ms — h3https://bitcoin.org/img/animations/herecomesbitcoin/hungry_right_hand.svg?1776683281/img/animations/herecomesbitcoin/hu... https://bitcoin.org/img/animations/herecomesbitcoin/hungry_right_hand.svg?1776683281 — 200 — 2.0 KiB — 27 ms — h3https://bitcoin.org/img/animations/herecomesbitcoin/hungry_left_hand.svg?1776683281/img/animations/herecomesbitcoin/hu... https://bitcoin.org/img/animations/herecomesbitcoin/hungry_left_hand.svg?1776683281 — 200 — 1.9 KiB — 29 ms — h3https://bitcoin.org/img/icons/ico_individuals.svg?1776683281/img/icons/ico_individuals.svg?1776... https://bitcoin.org/img/icons/ico_individuals.svg?1776683281 — 200 — 1.7 KiB — 25 ms — h3https://bitcoin.org/img/icons/ico_business.svg?1776683281/img/icons/ico_business.svg?1776683... https://bitcoin.org/img/icons/ico_business.svg?1776683281 — 200 — 1.7 KiB — 25 ms — h3https://bitcoin.org/img/icons/ico_developers.svg?1776683281/img/icons/ico_developers.svg?17766... https://bitcoin.org/img/icons/ico_developers.svg?1776683281 — 200 — 2.1 KiB — 24 ms — h3https://bitcoin.org/img/icons/ico_arrow_down.svg?1776683281/img/icons/ico_arrow_down.svg?17766... https://bitcoin.org/img/icons/ico_arrow_down.svg?1776683281 — 200 — 1.3 KiB — 32 ms — h3https://bitcoin.org/img/icons/main_ico_instant.svg?1776683281/img/icons/main_ico_instant.svg?177... https://bitcoin.org/img/icons/main_ico_instant.svg?1776683281 — 200 — 1.3 KiB — 31 ms — h3https://bitcoin.org/img/icons/main_ico_worldwide.svg?1776683281/img/icons/main_ico_worldwide.svg?1... https://bitcoin.org/img/icons/main_ico_worldwide.svg?1776683281 — 200 — 3.7 KiB — 31 ms — h3https://bitcoin.org/img/icons/main_ico_lowfee.svg?1776683281/img/icons/main_ico_lowfee.svg?1776... https://bitcoin.org/img/icons/main_ico_lowfee.svg?1776683281 — 200 — 2.5 KiB — 31 ms — h3https://bitcoin.org/img/icons/logo-footer.svg?1776683281/img/icons/logo-footer.svg?17766832... https://bitcoin.org/img/icons/logo-footer.svg?1776683281 — 200 — 6.2 KiB — 31 ms — h3https://bitcoin.org/js/analytics.js/js/analytics.js https://bitcoin.org/js/analytics.js — 200 — 933 B — 26 ms — h3https://bitcoin.org/json/hungry.json/json/hungry.json https://bitcoin.org/json/hungry.json — 200 — 30.6 KiB — 977 ms — h3https://bitcoin.org/json/hungry.json/json/hungry.json https://bitcoin.org/json/hungry.json — 200 — 0 B — 978 ms — h3https://bitcoin.org/json/flower_heads.json/json/flower_heads.json https://bitcoin.org/json/flower_heads.json — 200 — 303.3 KiB — 6.1 s — h3https://bitcoin.org/json/flower_heads.json/json/flower_heads.json https://bitcoin.org/json/flower_heads.json — 200 — 0 B — 6.1 s — h3https://bitcoin.org/json/fairy.json/json/fairy.json https://bitcoin.org/json/fairy.json — 200 — 63.9 KiB — 2.4 s — h3https://bitcoin.org/json/fairy.json/json/fairy.json https://bitcoin.org/json/fairy.json — 200 — 0 B — 2.4 s — h3https://bitcoin.org/img/icons/ico_angle.svg?1528322191/img/icons/ico_angle.svg?1528322191 https://bitcoin.org/img/icons/ico_angle.svg?1528322191 — 200 — 1.1 KiB — 28 ms — h3https://bitcoin.org/img/icons/play-btn.svg?1528322191/img/icons/play-btn.svg?1528322191 https://bitcoin.org/img/icons/play-btn.svg?1528322191 — 200 — 1.0 KiB — 25 ms — h3https://bitcoin.org/img/hero/overview-bg-repeat.png/img/hero/overview-bg-repeat.png https://bitcoin.org/img/hero/overview-bg-repeat.png — 200 — 104.9 KiB — 29 ms — h3https://bitcoin.org/font/titillium/TitilliumWeb-Regular.woff2/font/titillium/TitilliumWeb-Regula... https://bitcoin.org/font/titillium/TitilliumWeb-Regular.woff2 — 200 — 22.3 KiB — 27 ms — h3https://bitcoin.org/font/titillium/TitilliumWeb-SemiBold.woff2/font/titillium/TitilliumWeb-SemiBo... https://bitcoin.org/font/titillium/TitilliumWeb-SemiBold.woff2 — 200 — 22.1 KiB — 27 ms — h3https://bitcoin.org/font/titillium/TitilliumWeb-Bold.woff2/font/titillium/TitilliumWeb-Bold.w... https://bitcoin.org/font/titillium/TitilliumWeb-Bold.woff2 — 200 — 20.9 KiB — 34 ms — h3https://bitcoin.org/json/cat.json/json/cat.json https://bitcoin.org/json/cat.json — 200 — 70.8 KiB — 2.4 s — h3https://bitcoin.org/json/cat.json/json/cat.json https://bitcoin.org/json/cat.json — 200 — 0 B — 2.4 s — h3https://bitcoin.org/cdn-cgi/trace/cdn-cgi/trace https://bitcoin.org/cdn-cgi/trace — 200 — 664 B — 22 ms — h3https://bitcoin.org/img/hero/footer-bg.svg?1528322191/img/hero/footer-bg.svg?1528322191 https://bitcoin.org/img/hero/footer-bg.svg?1528322191 — 200 — 1.4 KiB — 33 ms — h3https://bitcoin.org/img/icons/netstatus_normal.svg?1528322191/img/icons/netstatus_normal.svg?152... https://bitcoin.org/img/icons/netstatus_normal.svg?1528322191 — 200 — 852 B — 33 ms — h3https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 80 ms — h2https://www.google-analytics.com/j/collect?v=1&_v=j102&a=32250772&t=pageview&_s=1&dl=https%3A%2F%2Fbitcoin.org%2Fen%2F&ul=en-us&dt=Bitcoin%20-%20Open%20source%20P2P%20money&sr=800x600&vp=1350x940&_u=IEBAAEABAAAAACAAI~&jid=2145113931&gjid=1406533459&cid=670594004.1776806676&tid=UA-170755108-1&_gid=1811405322.1776806676&_r=1&_slc=1&z=2078222195www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=32250772&t=pageview&_s=1&dl=https%3A%2F%2Fbitcoin.org%2Fen%2F&ul=en-us&dt=Bitcoin%20-%20Open%20source%20P2P%20money&sr=800x600&vp=1350x940&_u=IEBAAEABAAAAACAAI~&jid=2145113931&gjid=1406533459&cid=670594004.1776806676&tid=UA-170755108-1&_gid=1811405322.1776806676&_r=1&_slc=1&z=2078222195 — 200 — 462 B — 25 ms — h2https://bitcoin.org/js/cookieconsent/light-floating.css/js/cookieconsent/light-floating.cs... https://bitcoin.org/js/cookieconsent/light-floating.css — 200 — 1.5 KiB — 26 ms — h3https://bitcoin.org/favicon.png?1776683281/favicon.png?1776683281 https://bitcoin.org/favicon.png?1776683281 — 200 — 1.8 KiB — 26 ms — h3https://www.googletagmanager.com/gtag/js?id=G-G6FD47421W&cx=c&_slc=1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-G6FD47421W&cx=c&_slc=1 — -1 — 0 B — 0 ms —
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
10% of JavaScript execution is third-party
First-party Third-party 172ms · 0KB · €2/mo
Unattributable
Other
Optional
Execution 172ms
Transfer 0 KB
Monthly Cost €2/mo

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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