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https://adhdreading.org

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
6
PASS
12
INFO
3

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

Mobile Desktop
93
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.
100
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.

741 ms

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

1.57 s

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

60 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.

1.24 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.

2.31 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
22
12 PASS 6 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
Page Weight Budget
Action
1.8 MB transferred, 60 requests
REVIEW
1.8 MB transferred, 60 requests
Info::
Page weighs 3.0 MB (1.8 MB transferred)
Warning::
Images are 1.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.3 MB
Info::
60 HTTP requests
Info::
Estimated 0.39 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
60 requests
0.39 g CO2 per page load
Images 1.3 MiB 71%
JavaScript 413.2 KiB 22%
Other 48.4 KiB 3%
HTML 41.7 KiB 2%
CSS 38.3 KiB 2%
Other 5.4 KiB 0%
Other 1.6 KiB 0%
Other 1.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

B
Image Optimization
12 images, 0 KB saveable
REVIEW
12 images, 0 KB saveable
Warning::
https://navfolders.com/badge/nav_dark.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
12 images 1.3 MB
0 oversized -0 KB
6 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
1020ms total JS execution
REVIEW
1020ms total JS execution
Warning::
https://adhdreading.org/: 323ms CPU time
Info::
https://adhdreading.org/_next/static/chunks/1255-8...: 201ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-8VN0...: 166ms CPU time
Info::
Unattributable: 130ms CPU time
Info::
https://scripts.clarity.ms/0.8.69/clarity.js: 119ms CPU time
Info::
Third-party scripts: 285ms (28% of total)

Main Thread Breakdown

Script Evaluation 52% Style & Layout 23% Other 15% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://adhdreading.org/323ms6ms8ms1st
https://adhdreading.org/_next/static/chunks/1255-884a804d7c86d3a7.js201ms179ms5ms1st
https://www.googletagmanager.com/gtag/js?id=G-8VN0JG54JN166ms147ms17ms3rd
Unattributable130ms10ms0ms1st
https://scripts.clarity.ms/0.8.69/clarity.js119ms107ms2ms3rd
https://adhdreading.org/_next/static/chunks/webpack-299468d4e064a2ce.js81ms80ms0ms1st
B
JS Bundles
21 scripts, 69 KB unused
REVIEW
21 scripts, 69 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-8VN0...: 69 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 69 KB
69 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-8VN0JG54JN168 KB69 KB (41%)✓3rd
https://adhdreading.org/_next/static/chunks/1195-fe3bbead8eaa6cd2.js9 KB—✓1st
https://adhdreading.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js1 KB—✓1st
https://adhdreading.org/_next/static/chunks/webpack-299468d4e064a2ce.js2 KB—✓1st
https://adhdreading.org/_next/static/chunks/4bd1b696-100b9d70ed4e49c1.js53 KB—✓1st
https://adhdreading.org/_next/static/chunks/1255-884a804d7c86d3a7.js44 KB—✓1st
https://adhdreading.org/_next/static/chunks/main-app-24da8761396d27a6.js1 KB—✓1st
https://adhdreading.org/_next/static/chunks/3791-24092e910f47c726.js15 KB—✓1st
https://adhdreading.org/_next/static/chunks/2619-024c323f8ca0f6aa.js4 KB—✓1st
https://umami.bestvid.net/script.js3 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

B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
C
Page Weight Inventory
Action
60 resources · 1.8 MB · 69 KB savings available
REVIEW
60 resources · 1.8 MB · 69 KB savings available
Warning::
Page weight 1.8 MB exceeds 1 MB target by 862 KB
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~69 KB of savings available
Info::
17 third-party resources (11% of weight)
Info::
3 resources over 200KB
60 resources · 1.8 MiB · 17 third-party 862.1 KiB over 1MB target
Image 73% · 1.3 MiB
JavaScript 22% · 413.2 KiB
Document 2% · 41.7 KiB
CSS 2% · 38.3 KiB
Other 1% · 12.2 KiB

~68.7 KiB of savings available

Remove unused JavaScript: 68.7 KiB
A+
Third-Party Impact
11% third-party, 0 ms blocking
PASS
11% third-party, 0 ms blocking
Info::
Third-party code accounts for 11% of page weight (215.9 KiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
89%
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
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+
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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
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
60 requests over 3786ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 741 ms LCP 1.6 shttps://adhdreading.org// https://adhdreading.org/ — 200 — 41.7 KiB — 259 ms — h3https://adhdreading.org/logos/logo.webp/logos/logo.webp https://adhdreading.org/logos/logo.webp — 200 — 16.1 KiB — 60 ms — h3https://adhdreading.org/_next/static/css/9f089d67a368c348.css/_next/static/css/9f089d67a368c348.... https://adhdreading.org/_next/static/css/9f089d67a368c348.css — 200 — 19.8 KiB — 49 ms — h3https://adhdreading.org/_next/static/css/1b30ee0fb9015853.css/_next/static/css/1b30ee0fb9015853.... https://adhdreading.org/_next/static/css/1b30ee0fb9015853.css — 200 — 18.4 KiB — 46 ms — h3https://umami.bestvid.net/script.jsumami.bestvid.net/script.js https://umami.bestvid.net/script.js — 200 — 3.0 KiB — 116 ms — h3https://analytics.ahrefs.com/analytics.jsanalytics.ahrefs.com/analytics.js https://analytics.ahrefs.com/analytics.js — 200 — 3.0 KiB — 81 ms — h3https://adhdreading.org/after-hd.webp/after-hd.webp https://adhdreading.org/after-hd.webp — 200 — 386.7 KiB — 151 ms — h3https://adhdreading.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js/cdn-cgi/scripts/5c5dd728/cloudflar... https://adhdreading.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 996 B — 34 ms — h3https://adhdreading.org/_next/static/chunks/webpack-299468d4e064a2ce.js/_next/static/chunks/webpack-299468... https://adhdreading.org/_next/static/chunks/webpack-299468d4e064a2ce.js — 200 — 2.3 KiB — 46 ms — h3https://adhdreading.org/_next/static/chunks/4bd1b696-100b9d70ed4e49c1.js/_next/static/chunks/4bd1b696-100b9... https://adhdreading.org/_next/static/chunks/4bd1b696-100b9d70ed4e49c1.js — 200 — 53.5 KiB — 109 ms — h3https://adhdreading.org/_next/static/chunks/1255-884a804d7c86d3a7.js/_next/static/chunks/1255-884a804d7... https://adhdreading.org/_next/static/chunks/1255-884a804d7c86d3a7.js — 200 — 44.2 KiB — 118 ms — h3https://adhdreading.org/_next/static/chunks/main-app-24da8761396d27a6.js/_next/static/chunks/main-app-24da8... https://adhdreading.org/_next/static/chunks/main-app-24da8761396d27a6.js — 200 — 758 B — 58 ms — h3https://adhdreading.org/_next/static/chunks/3791-24092e910f47c726.js/_next/static/chunks/3791-24092e910... https://adhdreading.org/_next/static/chunks/3791-24092e910f47c726.js — 200 — 14.9 KiB — 110 ms — h3https://adhdreading.org/_next/static/chunks/2619-024c323f8ca0f6aa.js/_next/static/chunks/2619-024c323f8... https://adhdreading.org/_next/static/chunks/2619-024c323f8ca0f6aa.js — 200 — 3.9 KiB — 53 ms — h3https://adhdreading.org/_next/static/chunks/1356-3d2e09e2e9c64ec1.js/_next/static/chunks/1356-3d2e09e2e... https://adhdreading.org/_next/static/chunks/1356-3d2e09e2e9c64ec1.js — 200 — 5.7 KiB — 96 ms — h3https://adhdreading.org/_next/static/chunks/1195-fe3bbead8eaa6cd2.js/_next/static/chunks/1195-fe3bbead8... https://adhdreading.org/_next/static/chunks/1195-fe3bbead8eaa6cd2.js — 200 — 8.5 KiB — 108 ms — h3https://adhdreading.org/_next/static/chunks/5674-f6ff218e55fdacf5.js/_next/static/chunks/5674-f6ff218e5... https://adhdreading.org/_next/static/chunks/5674-f6ff218e55fdacf5.js — 200 — 10.2 KiB — 112 ms — h3https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/(home)/page-a298ab49c654edbd.js/_next/static/chunks/app/%5Blocale%... https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/(home)/page-a298ab49c654edbd.js — 200 — 23.4 KiB — 113 ms — h3https://adhdreading.org/_next/static/chunks/9414-5a83e25fdaf795eb.js/_next/static/chunks/9414-5a83e25fd... https://adhdreading.org/_next/static/chunks/9414-5a83e25fdaf795eb.js — 200 — 13.5 KiB — 110 ms — h3https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/%5B...slug%5D/page-77b613a93428e5c9.js/_next/static/chunks/app/%5Blocale%... https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/%5B...slug%5D/page-77b613a93428e5c9.js — 200 — 5.3 KiB — 112 ms — h3https://adhdreading.org/_next/static/chunks/3961-ddea059e92924eee.js/_next/static/chunks/3961-ddea059e9... https://adhdreading.org/_next/static/chunks/3961-ddea059e92924eee.js — 200 — 7.3 KiB — 109 ms — h3https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/layout-4f6fc394c6607e71.js/_next/static/chunks/app/%5Blocale%... https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/layout-4f6fc394c6607e71.js — 200 — 7.4 KiB — 111 ms — h3https://adhdreading.org/before-hd.webp/before-hd.webp https://adhdreading.org/before-hd.webp — 200 — 234.7 KiB — 130 ms — h3https://adhdreading.org/site.webmanifest/site.webmanifest https://adhdreading.org/site.webmanifest — 200 — 1.4 KiB — 121 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 — 200 — 11.3 KiB — 80 ms — h2https://adhdreading.org/images/what-why-how/what.webp/images/what-why-how/what.webp https://adhdreading.org/images/what-why-how/what.webp — 200 — 496.1 KiB — 57 ms — h3https://adhdreading.org/images/avatars/user-0.jpg/images/avatars/user-0.jpg https://adhdreading.org/images/avatars/user-0.jpg — 200 — 4.8 KiB — 36 ms — h3https://adhdreading.org/images/avatars/user-1.jpg/images/avatars/user-1.jpg https://adhdreading.org/images/avatars/user-1.jpg — 200 — 5.1 KiB — 30 ms — h3https://adhdreading.org/images/avatars/user-2.jpg/images/avatars/user-2.jpg https://adhdreading.org/images/avatars/user-2.jpg — 200 — 6.2 KiB — 38 ms — h3https://adhdreading.org/images/avatars/user-3.jpg/images/avatars/user-3.jpg https://adhdreading.org/images/avatars/user-3.jpg — 200 — 4.6 KiB — 46 ms — h3
0 ms 1.0 s 2.0 s 3.0 s FCP 741 ms LCP 1.6 shttps://adhdreading.org// https://adhdreading.org/ — 200 — 41.7 KiB — 259 ms — h3https://adhdreading.org/logos/logo.webp/logos/logo.webp https://adhdreading.org/logos/logo.webp — 200 — 16.1 KiB — 60 ms — h3https://adhdreading.org/_next/static/css/9f089d67a368c348.css/_next/static/css/9f089d67a368c348.... https://adhdreading.org/_next/static/css/9f089d67a368c348.css — 200 — 19.8 KiB — 49 ms — h3https://adhdreading.org/_next/static/css/1b30ee0fb9015853.css/_next/static/css/1b30ee0fb9015853.... https://adhdreading.org/_next/static/css/1b30ee0fb9015853.css — 200 — 18.4 KiB — 46 ms — h3https://umami.bestvid.net/script.jsumami.bestvid.net/script.js https://umami.bestvid.net/script.js — 200 — 3.0 KiB — 116 ms — h3https://analytics.ahrefs.com/analytics.jsanalytics.ahrefs.com/analytics.js https://analytics.ahrefs.com/analytics.js — 200 — 3.0 KiB — 81 ms — h3https://adhdreading.org/after-hd.webp/after-hd.webp https://adhdreading.org/after-hd.webp — 200 — 386.7 KiB — 151 ms — h3https://adhdreading.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js/cdn-cgi/scripts/5c5dd728/cloudflar... https://adhdreading.org/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js — 200 — 996 B — 34 ms — h3https://adhdreading.org/_next/static/chunks/webpack-299468d4e064a2ce.js/_next/static/chunks/webpack-299468... https://adhdreading.org/_next/static/chunks/webpack-299468d4e064a2ce.js — 200 — 2.3 KiB — 46 ms — h3https://adhdreading.org/_next/static/chunks/4bd1b696-100b9d70ed4e49c1.js/_next/static/chunks/4bd1b696-100b9... https://adhdreading.org/_next/static/chunks/4bd1b696-100b9d70ed4e49c1.js — 200 — 53.5 KiB — 109 ms — h3https://adhdreading.org/_next/static/chunks/1255-884a804d7c86d3a7.js/_next/static/chunks/1255-884a804d7... https://adhdreading.org/_next/static/chunks/1255-884a804d7c86d3a7.js — 200 — 44.2 KiB — 118 ms — h3https://adhdreading.org/_next/static/chunks/main-app-24da8761396d27a6.js/_next/static/chunks/main-app-24da8... https://adhdreading.org/_next/static/chunks/main-app-24da8761396d27a6.js — 200 — 758 B — 58 ms — h3https://adhdreading.org/_next/static/chunks/3791-24092e910f47c726.js/_next/static/chunks/3791-24092e910... https://adhdreading.org/_next/static/chunks/3791-24092e910f47c726.js — 200 — 14.9 KiB — 110 ms — h3https://adhdreading.org/_next/static/chunks/2619-024c323f8ca0f6aa.js/_next/static/chunks/2619-024c323f8... https://adhdreading.org/_next/static/chunks/2619-024c323f8ca0f6aa.js — 200 — 3.9 KiB — 53 ms — h3https://adhdreading.org/_next/static/chunks/1356-3d2e09e2e9c64ec1.js/_next/static/chunks/1356-3d2e09e2e... https://adhdreading.org/_next/static/chunks/1356-3d2e09e2e9c64ec1.js — 200 — 5.7 KiB — 96 ms — h3https://adhdreading.org/_next/static/chunks/1195-fe3bbead8eaa6cd2.js/_next/static/chunks/1195-fe3bbead8... https://adhdreading.org/_next/static/chunks/1195-fe3bbead8eaa6cd2.js — 200 — 8.5 KiB — 108 ms — h3https://adhdreading.org/_next/static/chunks/5674-f6ff218e55fdacf5.js/_next/static/chunks/5674-f6ff218e5... https://adhdreading.org/_next/static/chunks/5674-f6ff218e55fdacf5.js — 200 — 10.2 KiB — 112 ms — h3https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/(home)/page-a298ab49c654edbd.js/_next/static/chunks/app/%5Blocale%... https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/(home)/page-a298ab49c654edbd.js — 200 — 23.4 KiB — 113 ms — h3https://adhdreading.org/_next/static/chunks/9414-5a83e25fdaf795eb.js/_next/static/chunks/9414-5a83e25fd... https://adhdreading.org/_next/static/chunks/9414-5a83e25fdaf795eb.js — 200 — 13.5 KiB — 110 ms — h3https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/%5B...slug%5D/page-77b613a93428e5c9.js/_next/static/chunks/app/%5Blocale%... https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/(marketing)/%5B...slug%5D/page-77b613a93428e5c9.js — 200 — 5.3 KiB — 112 ms — h3https://adhdreading.org/_next/static/chunks/3961-ddea059e92924eee.js/_next/static/chunks/3961-ddea059e9... https://adhdreading.org/_next/static/chunks/3961-ddea059e92924eee.js — 200 — 7.3 KiB — 109 ms — h3https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/layout-4f6fc394c6607e71.js/_next/static/chunks/app/%5Blocale%... https://adhdreading.org/_next/static/chunks/app/%5Blocale%5D/layout-4f6fc394c6607e71.js — 200 — 7.4 KiB — 111 ms — h3https://adhdreading.org/before-hd.webp/before-hd.webp https://adhdreading.org/before-hd.webp — 200 — 234.7 KiB — 130 ms — h3https://adhdreading.org/site.webmanifest/site.webmanifest https://adhdreading.org/site.webmanifest — 200 — 1.4 KiB — 121 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 — 200 — 11.3 KiB — 80 ms — h2https://adhdreading.org/images/what-why-how/what.webp/images/what-why-how/what.webp https://adhdreading.org/images/what-why-how/what.webp — 200 — 496.1 KiB — 57 ms — h3https://adhdreading.org/images/avatars/user-0.jpg/images/avatars/user-0.jpg https://adhdreading.org/images/avatars/user-0.jpg — 200 — 4.8 KiB — 36 ms — h3https://adhdreading.org/images/avatars/user-1.jpg/images/avatars/user-1.jpg https://adhdreading.org/images/avatars/user-1.jpg — 200 — 5.1 KiB — 30 ms — h3https://adhdreading.org/images/avatars/user-2.jpg/images/avatars/user-2.jpg https://adhdreading.org/images/avatars/user-2.jpg — 200 — 6.2 KiB — 38 ms — h3https://adhdreading.org/images/avatars/user-3.jpg/images/avatars/user-3.jpg https://adhdreading.org/images/avatars/user-3.jpg — 200 — 4.6 KiB — 46 ms — h3https://adhdreading.org/cdn-cgi/rum?/cdn-cgi/rum? https://adhdreading.org/cdn-cgi/rum? — 204 — 453 B — 10 ms — h3https://adhdreading.org/favicon.ico/favicon.ico https://adhdreading.org/favicon.ico — 200 — 3.7 KiB — 31 ms — h3https://adhdreading.org/android-chrome-192x192.png/android-chrome-192x192.png https://adhdreading.org/android-chrome-192x192.png — 200 — 40.9 KiB — 40 ms — h3https://www.clarity.ms/tag/wtuttx5lziwww.clarity.ms/tag/wtuttx5lzi https://www.clarity.ms/tag/wtuttx5lzi — 200 — 1.1 KiB — 219 ms — http/1.1https://analytics.ahrefs.com/api/eventanalytics.ahrefs.com/api/event https://analytics.ahrefs.com/api/event — 200 — 308 B — 117 ms — h3https://umami.bestvid.net/api/sendumami.bestvid.net/api/send https://umami.bestvid.net/api/send — 204 — 0 B — 204 ms — h3https://adhdreading.org/features?_rsc=9f3v3/features?_rsc=9f3v3 https://adhdreading.org/features?_rsc=9f3v3 — 301 — 426 B — 422 ms — h3https://adhdreading.org/about?_rsc=9f3v3/about?_rsc=9f3v3 https://adhdreading.org/about?_rsc=9f3v3 — 301 — 427 B — 24 ms — h3https://adhdreading.org/blog?_rsc=9f3v3/blog?_rsc=9f3v3 https://adhdreading.org/blog?_rsc=9f3v3 — 301 — 429 B — 419 ms — h3https://adhdreading.org/pricing?_rsc=9f3v3/pricing?_rsc=9f3v3 https://adhdreading.org/pricing?_rsc=9f3v3 — 301 — 423 B — 418 ms — h3https://adhdreading.org/faq?_rsc=9f3v3/faq?_rsc=9f3v3 https://adhdreading.org/faq?_rsc=9f3v3 — 301 — 425 B — 418 ms — h3https://adhdreading.org/about//about/ https://adhdreading.org/about/ — 200 — 642 B — 568 ms — h3https://www.googletagmanager.com/gtag/js?id=G-8VN0JG54JNwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-8VN0JG54JN — 200 — 167.9 KiB — 110 ms — h2https://umami.bestvid.net/api/sendumami.bestvid.net/api/send https://umami.bestvid.net/api/send — 200 — 1.1 KiB — 200 ms — h3https://www.google-analytics.com/g/collect?v=2&tid=G-8VN0JG54JN&gtm=45je68o1v9231579111za200zd9231579111&_p=1787759778873&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=800389894.1787759779&frm=0&ngs=1&pscdl=noapi&rcb=5&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=115938466~115938468~118897920~118897930~119367802~119367810~120213116~120385423&dp=%2F&sid=1787759779&sct=1&seg=0&dl=https%3A%2F%2Fadhdreading.org%2F&dt=ADHD%20Reading%20-%20ADHD%20Reading%20Extension%20for%20Better%20Focus&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=1153www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-8VN0JG54JN&gtm=45je68o1v9231579111za200zd9231579111&_p=1787759778873&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=800389894.1787759779&frm=0&ngs=1&pscdl=noapi&rcb=5&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=115938466~115938468~118897920~118897930~119367802~119367810~120213116~120385423&dp=%2F&sid=1787759779&sct=1&seg=0&dl=https%3A%2F%2Fadhdreading.org%2F&dt=ADHD%20Reading%20-%20ADHD%20Reading%20Extension%20for%20Better%20Focus&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=1153 — 204 — 549 B — 100 ms — h2https://www.googletagmanager.com/a?v=3&t=l&pid=1400026031&rv=68o1&tag_exp=115938466~115938468~118897920~118897930~119367802~119367810~120213116~120385423&u=AAAAAAAAAAAAACCA&h=Ag&gtm=45je68o1v9231579111za200zd9231579111&ccid=231579111&cid=G-8VN0JG54JN&l=L867.S30.Y7.B71.E94.I699.TC16.HTC0.F592.C2~gtm.init_consent.S11.V8.E84~gtm.init.S3.V1.TS5ogtautoevents.TI9.TE1.TS5ogt1pdatav2.TI11.TE1.TS5ccdgafirst.TI24.TE0.TS5setproductsettings.TI23.TE0.TS5ccdgaregscope.TI22.TE1.TS5ccdemdownload.TI21.TE1.TS5ccdemform.TI20.TE1.TS5ccdemoutboundclick.TI19.TE0.TS5ccdempageview.TI18.TE1.TS5ccdemscroll.TI17.TE1.TS5ccdemsitesearch.TI16.TE0.TS5ccdemvideo.TI15.TE1.TS5ccdconversionmarking.TI14.TE0.TS5ccdautoredact.TI13.TE0.TS5ccdgalast.TI12.TE0~gtm.js.S0.V0.TS5gct.TI7.TE1~gtm.dom.S4.V3.E21~gtm.load.S1.V0.E17~GA287www.googletagmanager.com/a?v=3&t=l&... https://www.googletagmanager.com/a?v=3&t=l&pid=1400026031&rv=68o1&tag_exp=115938466~115938468~118897920~118897930~119367802~119367810~120213116~120385423&u=AAAAAAAAAAAAACCA&h=Ag&gtm=45je68o1v9231579111za200zd9231579111&ccid=231579111&cid=G-8VN0JG54JN&l=L867.S30.Y7.B71.E94.I699.TC16.HTC0.F592.C2~gtm.init_consent.S11.V8.E84~gtm.init.S3.V1.TS5ogtautoevents.TI9.TE1.TS5ogt1pdatav2.TI11.TE1.TS5ccdgafirst.TI24.TE0.TS5setproductsettings.TI23.TE0.TS5ccdgaregscope.TI22.TE1.TS5ccdemdownload.TI21.TE1.TS5ccdemform.TI20.TE1.TS5ccdemoutboundclick.TI19.TE0.TS5ccdempageview.TI18.TE1.TS5ccdemscroll.TI17.TE1.TS5ccdemsitesearch.TI16.TE0.TS5ccdemvideo.TI15.TE1.TS5ccdconversionmarking.TI14.TE0.TS5ccdautoredact.TI13.TE0.TS5ccdgalast.TI12.TE0~gtm.js.S0.V0.TS5gct.TI7.TE1~gtm.dom.S4.V3.E21~gtm.load.S1.V0.E17~GA287 — 200 — 59 B — 25 ms — h2https://adhdreading.org/features//features/ https://adhdreading.org/features/ — 200 — 647 B — 369 ms — h3https://adhdreading.org/pricing//pricing/ https://adhdreading.org/pricing/ — 200 — 651 B — 368 ms — h3https://adhdreading.org/faq//faq/ https://adhdreading.org/faq/ — 200 — 646 B — 370 ms — h3https://adhdreading.org/blog//blog/ https://adhdreading.org/blog/ — 200 — 675 B — 374 ms — h3https://scripts.clarity.ms/0.8.69/clarity.jsscripts.clarity.ms/0.8.69/clarity.j... https://scripts.clarity.ms/0.8.69/clarity.js — 200 — 25.2 KiB — 36 ms — h2https://c.clarity.ms/c.gifc.clarity.ms/c.gif https://c.clarity.ms/c.gif — 302 — 518 B — 98 ms — h2https://c.bing.com/c.gif?ctsa=mr&CtsSyncId=ACE67D00781F45C18A6CF752EDDEDC2F&RedC=c.clarity.ms&MXFR=22E70C6CB9816D2518C31BADBD8163B0c.bing.com/c.gif?ctsa=mr&CtsSyncId=... https://c.bing.com/c.gif?ctsa=mr&CtsSyncId=ACE67D00781F45C18A6CF752EDDEDC2F&RedC=c.clarity.ms&MXFR=22E70C6CB9816D2518C31BADBD8163B0 — 302 — 762 B — 85 ms — h2https://adhdreading.org/download?_rsc=9f3v3/download?_rsc=9f3v3 https://adhdreading.org/download?_rsc=9f3v3 — 301 — 432 B — 206 ms — h3https://i.clarity.ms/collecti.clarity.ms/collect https://i.clarity.ms/collect — 204 — 279 B — 211 ms — http/1.1https://c.clarity.ms/c.gif?ctsa=mr&CtsSyncId=ACE67D00781F45C18A6CF752EDDEDC2F&MUID=08430260D87565B20F1515A1D92B6414c.clarity.ms/c.gif?ctsa=mr&CtsSyncI... https://c.clarity.ms/c.gif?ctsa=mr&CtsSyncId=ACE67D00781F45C18A6CF752EDDEDC2F&MUID=08430260D87565B20F1515A1D92B6414 — 200 — 467 B — 34 ms — h2https://adhdreading.org/download//download/ https://adhdreading.org/download/ — 200 — 642 B — 42 ms — h3https://i.clarity.ms/collecti.clarity.ms/collect https://i.clarity.ms/collect — 204 — 279 B — 189 ms — http/1.1https://adhdreading.org/focus-highlighting.webp/focus-highlighting.webp https://adhdreading.org/focus-highlighting.webp — 200 — 181.2 KiB — 53 ms — h3https://i.clarity.ms/collecti.clarity.ms/collect https://i.clarity.ms/collect — 204 — 279 B — 69 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
28% of JavaScript execution is third-party
First-party Third-party 285ms · 193KB · €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 166ms
Transfer 168 KB
Unused 41%
Monthly Cost €1/mo
Microsoft Clarity
Session Replay
Optional
Execution 119ms
Transfer 25 KB
Monthly Cost €1/mo

How third-party costs are calculated

Image Optimization
37 images, 1183 KB total, 1050 KB wasted
INFO

Image Optimization Audit

Total Images

37

Total Size

1183 KB

Oversized

5

Wasted

1050 KB

35 missing dimensions 2 missing lazy loading
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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