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https://bitcointalk.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
0
REVIEW
2
PASS
13
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
55
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.

1.05 s

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

1.05 s

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

0 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.

1.05 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.

1.05 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
13 PASS 2 REVIEW
C
Image Optimization
Action
12 images, 0 KB saveable
REVIEW
12 images, 0 KB saveable
Warning::
https://bitcointalk.org/Themes/custom1/images/coll... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcointalk.org/Themes/custom1/images/upsh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcointalk.org/Themes/custom1/images/filt... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcointalk.org/Themes/custom1/images/off.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcointalk.org/Themes/custom1/images/post... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://bitcointalk.org/Themes/custom1/images/icon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
12 images 6 KB
0 oversized -0 KB
12 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

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
Last-Modified header present
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
A+
Page Weight Budget
34 KB transferred, 18 requests
PASS
34 KB transferred, 18 requests
Info::
Page weighs 127 KB (34 KB transferred)
Info::
18 HTTP requests
Info::
Estimated 0.01 g CO2 per page load
34 KB / 2.4 MB budget
34 KB transferred
18 requests
0.01 g CO2 per page load
HTML 16.2 KiB 47%
Images 6.1 KiB 18%
CSS 5.3 KiB 15%
JavaScript 4.8 KiB 14%
Other 2.0 KiB 6%
0 2.4 MB 4.9 MB
Under budget
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+
JS Execution Cost
380ms total JS execution
PASS
380ms total JS execution
Warning::
https://bitcointalk.org/: 259ms CPU time
Info::
Unattributable: 122ms CPU time
Info::
Third-party scripts: 122ms (32% of total)

Main Thread Breakdown

Style & Layout 43% Other 39% Rendering 9% Parse HTML & CSS 5% Script Evaluation 4%
ScriptTotalScriptingParse/CompileParty
https://bitcointalk.org/259ms6ms2ms1st
Unattributable122ms5ms0ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://bitcointalk.org/Themes/default/script.js5 KB—✓1st
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
18 resources · 34 KB · 0 KB savings available
PASS
18 resources · 34 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 34 KB
18 resources · 34.4 KiB · 0 third-party Within 1MB page-weight target
Document 47% · 16.2 KiB
Image 24% · 8.1 KiB
CSS 15% · 5.3 KiB
JavaScript 14% · 4.8 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
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
18 requests over 453ms
INFO
0 ms 500 ms 1.0 s FCP 1.0 s LCP 1.0 shttps://bitcointalk.org// https://bitcointalk.org/ — 200 — 16.2 KiB — 301 ms — h2https://bitcointalk.org/Themes/default/script.js/Themes/default/script.js https://bitcointalk.org/Themes/default/script.js — 200 — 4.8 KiB — 37 ms — h2https://bitcointalk.org/Themes/custom1/style.css/Themes/custom1/style.css https://bitcointalk.org/Themes/custom1/style.css — 200 — 4.5 KiB — 33 ms — h2https://bitcointalk.org/Themes/custom1/mobile.css/Themes/custom1/mobile.css https://bitcointalk.org/Themes/custom1/mobile.css — 200 — 546 B — 28 ms — h2https://bitcointalk.org/Themes/custom1/images/smflogo.gif/Themes/custom1/images/smflogo.gif https://bitcointalk.org/Themes/custom1/images/smflogo.gif — 200 — 1.1 KiB — 26 ms — h2https://bitcointalk.org/Themes/custom1/images/upshrink.gif/Themes/custom1/images/upshrink.gif https://bitcointalk.org/Themes/custom1/images/upshrink.gif — 200 — 247 B — 29 ms — h2https://bitcointalk.org/Themes/custom1/images/filter.gif/Themes/custom1/images/filter.gif https://bitcointalk.org/Themes/custom1/images/filter.gif — 200 — 289 B — 26 ms — h2https://bitcointalk.org/Themes/custom1/images/off.gif/Themes/custom1/images/off.gif https://bitcointalk.org/Themes/custom1/images/off.gif — 200 — 575 B — 27 ms — h2https://bitcointalk.org/Themes/custom1/images/collapse.gif/Themes/custom1/images/collapse.gif https://bitcointalk.org/Themes/custom1/images/collapse.gif — 200 — 249 B — 28 ms — h2https://bitcointalk.org/Themes/custom1/images/post/xx.gif/Themes/custom1/images/post/xx.gif https://bitcointalk.org/Themes/custom1/images/post/xx.gif — 200 — 373 B — 30 ms — h2https://bitcointalk.org/Themes/custom1/images/icons/info.gif/Themes/custom1/images/icons/info.g... https://bitcointalk.org/Themes/custom1/images/icons/info.gif — 200 — 771 B — 29 ms — h2https://bitcointalk.org/Themes/custom1/images/powered-mysql.gif/Themes/custom1/images/powered-mysq... https://bitcointalk.org/Themes/custom1/images/powered-mysql.gif — 200 — 493 B — 28 ms — h2https://bitcointalk.org/Themes/custom1/images/powered-php.gif/Themes/custom1/images/powered-php.... https://bitcointalk.org/Themes/custom1/images/powered-php.gif — 200 — 549 B — 31 ms — h2https://bitcointalk.org/Themes/custom1/images/valid-xhtml10.gif/Themes/custom1/images/valid-xhtml1... https://bitcointalk.org/Themes/custom1/images/valid-xhtml10.gif — 200 — 588 B — 31 ms — h2https://bitcointalk.org/Themes/custom1/images/valid-css.gif/Themes/custom1/images/valid-css.gi... https://bitcointalk.org/Themes/custom1/images/valid-css.gif — 200 — 525 B — 32 ms — h2https://bitcointalk.org/Themes/default/print.css/Themes/default/print.css https://bitcointalk.org/Themes/default/print.css — 200 — 202 B — 32 ms — h2https://bitcointalk.org/Themes/custom1/images/catbg.jpg/Themes/custom1/images/catbg.jpg https://bitcointalk.org/Themes/custom1/images/catbg.jpg — 200 — 444 B — 27 ms — h2https://bitcointalk.org/favicon.ico/favicon.ico https://bitcointalk.org/favicon.ico — 200 — 2.0 KiB — 25 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
32% of JavaScript execution is third-party
First-party Third-party 122ms · 0KB · $2/mo
Unattributable
Other
Optional
Execution 122ms
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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