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Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
7
PASS
14
INFO
4

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

Mobile Desktop
67
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

1.57 s

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

82.77 s

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

316 ms

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

0.023

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

2.44 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.

86.26 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
27
14 PASS 7 REVIEW 2 FIX
F
Page Weight Budget
Action
22.4 MB transferred, 47 requests
FIX
22.4 MB transferred, 47 requests
Critical::
Page weighs 23.0 MB (22.4 MB transferred)
Warning::
Images are 22.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 22.1 MB
Info::
47 HTTP requests
Info::
Estimated 4.7 g CO2 per page load
22.4 MB / 2.4 MB budget
22.4 MB transferred
47 requests
4.7 g CO2 per page load
Images 22.1 MiB 99%
JavaScript 175.2 KiB 1%
Fonts 101.1 KiB 0%
CSS 31.6 KiB 0%
HTML 14.1 KiB 0%
Other 8.6 KiB 0%
Other 877 B 0%
Other 560 B 0%
Other 353 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

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.
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://creativecommons.org/wp-content/uploads/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 22.1 MB
0 oversized -0 KB
18 legacy format
12 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

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
1423ms total JS execution
REVIEW
1423ms total JS execution
Warning::
Unattributable: 656ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-J83G...: 426ms CPU time
Warning::
https://creativecommons.org/: 341ms CPU time
Info::
Third-party scripts: 426ms (30% of total)

Main Thread Breakdown

Other 47% Script Evaluation 28% Style & Layout 15% Script Parsing & Compilation 4% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable656ms11ms0ms1st
https://www.googletagmanager.com/gtag/js?id=G-J83GSCH0LS426ms365ms58ms3rd
https://creativecommons.org/341ms23ms5ms1st
B
JS Bundles
5 scripts, 56 KB unused
REVIEW
5 scripts, 56 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-J83G...: 56 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 56 KB
56 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-J83GSCH0LS171 KB56 KB (33%)✓3rd
https://creativecommons.org/wp-content/plugins/google-analytics-for-wordpress/assets/js/frontend-gtag.min.js?ver=8.27.03 KB—✓1st
blob:https://creativecommons.org/855b2ad0-6a37-4e54-849a-57a1bae3a93f-0 KB—✓3rd
https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/js/vocabulary.js0 KB—✓1st
https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/js/pidgin.js0 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

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
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.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Page Weight Inventory
Action
47 resources · 22.4 MB · 56 KB savings available
REVIEW
47 resources · 22.4 MB · 56 KB savings available
Warning::
Page weight 22.4 MB exceeds 1 MB target by 21.4 MB
Got: 22.4 MB Expected: ≤ 1 MB
Info::
~56 KB of savings available
Info::
9 third-party resources (1% of weight)
Info::
11 resources over 200KB
47 resources · 22.4 MiB · 9 third-party 21.4 MiB over 1MB target
Image 99% · 22.1 MiB
JavaScript 1% · 175.2 KiB
Font 0% · 101.1 KiB
CSS 0% · 31.6 KiB
Document 0% · 14.4 KiB
Other 0% · 1.5 KiB

~55.8 KiB of savings available

Remove unused JavaScript: 55.8 KiB
A+
Third-Party Impact
1% third-party, 0 ms blocking
PASS
1% third-party, 0 ms blocking
Info::
Third-party code accounts for 1% of page weight (172.8 KiB of 22.4 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
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
4 fonts (101 KB)
PASS
4 fonts (101 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

101 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s 68.0 s 70.0 s 72.0 s 74.0 s 76.0 s 78.0 s 80.0 s 82.0 s 84.0 s 86.0 s FCP 1.6 s LCP 82.8 shttps://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/fonts/dm-mono/exports/DMMono-Regular.ttfDMMono-Regular.ttf https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/fonts/dm-mono/exports/DMMono-Regular.ttf — 25.9 KiB — 80 ms — font-display: swaphttps://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/fonts/dm-fonts/Sans/fonts/webfonts/DMSans-SemiBold.woff2DMSans-SemiBold.woff2 https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/fonts/dm-fonts/Sans/fonts/webfonts/DMSans-SemiBold.woff2 — 29.5 KiB — 80 ms — font-display: swaphttps://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/fonts/dm-fonts/Sans/fonts/webfonts/DMSans-Regular.woff2DMSans-Regular.woff2 https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/fonts/dm-fonts/Sans/fonts/webfonts/DMSans-Regular.woff2 — 29.8 KiB — 80 ms — font-display: swaphttps://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/fonts/SourceSansPro-Regular.woff2SourceSansPro-Regular.w... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/fonts/SourceSansPro-Regular.woff2 — 15.9 KiB — 80 ms — font-display: swap
DMMono-Regular.ttf ttf swap
Size 26 KB
Load time 80 ms
Start 303 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
DMSans-SemiBold.woff2 woff2 swap
Size 29 KB
Load time 80 ms
Start 304 ms
Risk FOUT — text flashes from fallback to web font
DMSans-Regular.woff2 woff2 swap
Size 30 KB
Load time 80 ms
Start 304 ms
Risk FOUT — text flashes from fallback to web font
SourceSansPro-Regular.w... woff2 swap
Size 16 KB
Load time 80 ms
Start 304 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)

Fixing the unchecked items could save ~8 KB and ~16 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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 Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
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::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
3 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Info::
1 `@import` rule(s) in inline `<style>` blocks -- chains an extra round-trip
Each `@import` in CSS forces a serial dependency: the parent stylesheet must download and parse before the browser even knows which URL to fetch next. This used to be catastrophic on HTTP/1.1; HTTP/2 and HTTP/3 multiplexing make it less painful but still strictly worse than declaring `<link rel="stylesheet">` siblings. Replace `@import url(...)` with `<link rel="stylesheet" href="...">` in HTML so the browser discovers and fetches in parallel.
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
47 requests over 1352ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s 68.0 s 70.0 s 72.0 s 74.0 s 76.0 s 78.0 s 80.0 s 82.0 s 84.0 s 86.0 s FCP 1.6 s LCP 82.8 shttps://creativecommons.org// https://creativecommons.org/ — 200 — 14.1 KiB — 79 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/style.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/style.css — 200 — 6.1 KiB — 30 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/css/pidgin.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/css/pidgin.css — 200 — 10.0 KiB — 43 ms — h2https://creativecommons.org/wp-content/plugins/tablepress/css/build/default.css?ver=2.3.2/wp-content/plugins/tablepress/css/... https://creativecommons.org/wp-content/plugins/tablepress/css/build/default.css?ver=2.3.2 — 200 — 2.5 KiB — 35 ms — h2https://creativecommons.org/wp-content/plugins/google-analytics-for-wordpress/assets/js/frontend-gtag.min.js?ver=8.27.0/wp-content/plugins/google-analytic... https://creativecommons.org/wp-content/plugins/google-analytics-for-wordpress/assets/js/frontend-gtag.min.js?ver=8.27.0 — 200 — 3.3 KiB — 38 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/Group-32.png/wp-content/uploads/2026/04/Group-3... https://creativecommons.org/wp-content/uploads/2026/04/Group-32.png — 200 — 243.2 KiB — 81 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/Group-20-1.png/wp-content/uploads/2026/04/Group-2... https://creativecommons.org/wp-content/uploads/2026/04/Group-20-1.png — 200 — 22.5 KiB — 80 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/css/vocabulary.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/css/vocabulary.css — 200 — 6.8 KiB — 40 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/chooser/css/chooser.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/chooser/css/chooser.css — 200 — 1.8 KiB — 40 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/css/library-vars.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/css/library-vars.css — 200 — 668 B — 38 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/tools-for-building.png/wp-content/uploads/2026/04/tools-f... https://creativecommons.org/wp-content/uploads/2026/04/tools-for-building.png — 200 — 6.7 MiB — 301 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/Teams-2-1-1.png/wp-content/uploads/2026/04/Teams-2... https://creativecommons.org/wp-content/uploads/2026/04/Teams-2-1-1.png — 200 — 666.4 KiB — 105 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/css/vendor/normalize.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/css/vendor/normalize.css — 200 — 1.8 KiB — 24 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/css/library-vars.css/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/css/library-vars.css — 200 — 2.0 KiB — 40 ms — h2blob:https://creativecommons.org/855b2ad0-6a37-4e54-849a-57a1bae3a93fcreativecommons.org/855b2ad0-6a37-4... blob:https://creativecommons.org/855b2ad0-6a37-4e54-849a-57a1bae3a93f — 200 — -1 B — 114 ms — blobhttps://creativecommons.org/wp-content/uploads/2026/04/Rectangle-1.png/wp-content/uploads/2026/04/Rectang... https://creativecommons.org/wp-content/uploads/2026/04/Rectangle-1.png — 200 — 977.2 KiB — 115 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/js/vocabulary.js/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/js/vocabulary.js — 200 — 419 B — 55 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/js/pidgin.js/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/pidgin/js/pidgin.js — 200 — 470 B — 85 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/favicon/manifest.webmanifest/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/favicon/manifest.webmanifest — 200 — 353 B — 76 ms — h2https://www.googletagmanager.com/gtag/js?id=G-J83GSCH0LSwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-J83GSCH0LS — 200 — 171.0 KiB — 439 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/Support-CC-in-Style.png/wp-content/uploads/2026/04/Support... https://creativecommons.org/wp-content/uploads/2026/04/Support-CC-in-Style.png — 200 — 734.3 KiB — 161 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/Group-33.png/wp-content/uploads/2026/04/Group-3... https://creativecommons.org/wp-content/uploads/2026/04/Group-33.png — 200 — 72.9 KiB — 144 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/Commons-in-the-age-of-AI.png/wp-content/uploads/2026/04/Commons... https://creativecommons.org/wp-content/uploads/2026/04/Commons-in-the-age-of-AI.png — 200 — 4.0 MiB — 342 ms — h2https://creativecommons.org/wp-content/uploads/2026/04/support-1.png/wp-content/uploads/2026/04/support... https://creativecommons.org/wp-content/uploads/2026/04/support-1.png — 200 — 3.1 MiB — 414 ms — 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https://www.google.com/ccm/collect?rcb=18&frm=0&auid=731546989.1784551587&dt=The%20commons%20belongs%20to%20us%20all%20-%20Creative%20Commons&en=page_view&dl=https%3A%2F%2Fcreativecommons.org%2F&scrsrc=www.googletagmanager.com&rnd=510781212.1784551587&navt=n&npa=1&ep.forceSSL=true&ep.anonymize_ip=true&did=dZGIzZG&gdid=dZGIzZG&gtm=45je67f0v9128869598za200zd9128869598xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=115938465~115938468~118897920~118897930~119709549~119724320~119773331&apve=1&apvf=f&apvc=1&tids=AW-937044476&tid=AW-937044476&tft=1784551586916&tfd=805&fmt=8 — 200 — 21 B — 71 ms — h3https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/favicon/favicon.svg/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/favicon/favicon.svg — 200 — 1.6 KiB — 25 ms — h2https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/favicon/favicon.ico/wp-content/themes/vocabulary-theme... https://creativecommons.org/wp-content/themes/vocabulary-theme/vocabulary/favicon/favicon.ico — 200 — 81 B — 28 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
30% of JavaScript execution is third-party
First-party Third-party 426ms · 171KB · $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 426ms
Transfer 171 KB
Unused 33%
Monthly Cost $6/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 426ms and costs ~$6/month

Google Tag Manager takes 426ms 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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-06-21 — 2026-07-18)

LCP (p75)

1307 ms

91% good

INP (p75)

93 ms

91% good

CLS (p75)

0.040

88% good

FCP (p75)

1214 ms

TTFB (p75)

523 ms

This origin passes Core Web Vitals assessment
Image Optimization
18 images, 23915 KB total, 17242 KB wasted
INFO

Image Optimization Audit

Total Images

18

Total Size

23915 KB

Oversized

12

Wasted

17242 KB

18 missing dimensions 17 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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