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https://arrl.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
59
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.
83
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.

3.39 s

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

23.29 s

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

1.20 s

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

0.207

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

15.98 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.

29.78 s

Page Load Progression

5.2 s
10.5 s
15.7 s
20.9 s
26.1 s
31.4 s
36.6 s
41.8 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
5.6 MB transferred, 96 requests
FIX
5.6 MB transferred, 96 requests
Critical::
Page weighs 10.1 MB (5.6 MB transferred)
Warning::
Images are 3.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.4 MB
Warning::
JavaScript is 1.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.8 MB
Info::
CSS is 206 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 206 KB
Info::
96 HTTP requests
Info::
Estimated 1.2 g CO2 per page load
5.6 MB / 2.4 MB budget
5.6 MB transferred
96 requests
1.2 g CO2 per page load
Images 3.4 MiB 61%
JavaScript 1.8 MiB 33%
CSS 205.8 KiB 4%
HTML 80.0 KiB 1%
Fonts 33.9 KiB 1%
Other 14.6 KiB 0%
Other 1.9 KiB 0%
Other 1.3 KiB 0%
Other 547 B 0%
Other 0 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

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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (5.6 MiB of 5.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5149ms total JS execution
FIX
5149ms total JS execution
Warning::
https://cdn.informz.net/web_trk/sp.js: 1461ms CPU time
Warning::
Unattributable: 862ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5BC...: 567ms CPU time
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 505ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-EJ3Z...: 472ms CPU time
Warning::
Third-party scripts: 5149ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 25% Script Parsing & Compilation 9% Style & Layout 4%
ScriptTotalScriptingParse/CompileParty
https://cdn.informz.net/web_trk/sp.js1461ms1055ms9ms3rd
Unattributable862ms11ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5BCPW62567ms474ms67ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604220101/show_ads_impl_fy2021.js?bust=31098047505ms361ms122ms3rd
https://www.googletagmanager.com/gtag/js?id=G-EJ3Z6E6BZ8&cx=c&gtm=4e64k1472ms384ms82ms3rd
https://www.arrl.org/432ms19ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PZM4RWMR3R&cx=c&gtm=4e64k1409ms323ms84ms3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6603351099942200176ms145ms28ms3rd
https://www.arrl.org/js/packed/4b1e36f83acf011ab91c2a6e757af96f_1776880331.js115ms73ms19ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PZM4RWMR3R99ms34ms65ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
19 scripts, 581 KB unused
FIX
19 scripts, 581 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 136 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PZM4...: 114 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.arrl.org/js/packed/4b1e36f83acf011ab91...: 97 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-EJ3Z...: 69 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PZM4...: 69 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 581 KB
581 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604220101/show_ads_impl_fy2021.js?bust=31098047177 KB136 KB (77%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-PZM4RWMR3R176 KB114 KB (65%)✓3rd
https://www.arrl.org/js/packed/4b1e36f83acf011ab91c2a6e757af96f_1776880331.js150 KB97 KB (64%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-EJ3Z6E6BZ8&cx=c&gtm=4e64k1176 KB69 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-PZM4RWMR3R&cx=c&gtm=4e64k1176 KB69 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5BCPW62138 KB68 KB (49%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-660335109994220054 KB29 KB (53%)✓3rd
https://www.youtube.com/s/player/1bb6ee63/player_embed_es6.vflset/en_US/base.js436 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021.O/am=AAAAAABA/d=1/br=1/rs=AGKMywHzdAio_amdJjxZA_PDzRfOjLgAgQ/m=root,base317 KB—✓3rd
https://ads.arrl.org/delivery/ajs.php?zoneid=1&cb=52391942334&charset=UTF-8&loc=https%3A//www.arrl.org/1 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

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

F
Page Weight Inventory
Action
96 resources · 5.6 MB · 581 KB savings available
FIX
96 resources · 5.6 MB · 581 KB savings available
Warning::
Page weight 4.6 MB over 1MB target
Got: 5.6 MB Expected: ≤ 1 MB
Info::
~581 KB of savings available
Warning::
95 third-party resources (100% of weight)
Info::
7 resources over 200KB
96 resources · 5.6 MiB · 95 third-party 4.6 MiB over 1MB target
Image 61% · 3.4 MiB
JavaScript 33% · 1.8 MiB
CSS 4% · 205.8 KiB
Document 1% · 80.2 KiB
Font 1% · 33.9 KiB
Other 0% · 16.3 KiB

~581.0 KiB of savings available

Remove unused JavaScript: 581.0 KiB
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
47 images, 0 KB saveable
REVIEW
47 images, 0 KB saveable
Warning::
https://www.arrl.org/img/65x70/News/ARRL%20Product... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/Elecraft%20Log... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/social/wh_instagram.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/home/trophy.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/latest_1024_HM... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/misc/ota202108.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/home/diamond_logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/home/book.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/social/wh_linkedin.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/Long%20Joshua%... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/latest_256_HMI... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/images/view/Home/QST/Read_QST... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/files/image/graphics/FD26_Hom... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/files/image/graphics/Homepage... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/files/image/AWE/Homepage_Grap... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/Panther%20club... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/files/image/graphics/Teachers... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/Final%2026%20H... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/76x94/shop/images/T/xctmp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/home/info.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/76x94/shop/images/T/xctmp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/files/image/Home/ARRL_New%20B... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/76x94/shop/images/T/xctmp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/65x70/News/latest_256_HMI... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/home/news_icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/img/social/wh_twitter.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.arrl.org/files/image/graphics/Pass_the... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
47 images 3.4 MB
0 oversized -0 KB
47 legacy format
27 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

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

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

Green Hosting

No green hosting detected

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
1 fonts (34 KB)
PASS
1 fonts (34 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

34 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 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 FCP 3.4 s LCP 23.3 shttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 29 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 29 ms
Start 1.5 s
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+
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
96 requests over 40326ms
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 FCP 3.4 s LCP 23.3 shttps://arrl.org// https://arrl.org/ — 302 — 193 B — 86 ms — http/1.1https://www.arrl.org/www.arrl.org/ https://www.arrl.org/ — 200 — 12.2 KiB — 1.0 s — http/1.1https://www.arrl.org/css/style.csswww.arrl.org/css/style.css https://www.arrl.org/css/style.css — 200 — 91.3 KiB — 130 ms — http/1.1https://www.arrl.org/css/packed/fd35b8f337d3856bc83bf7a995edbf6e_1776879986.csswww.arrl.org/css/packed/fd35b8f337d... https://www.arrl.org/css/packed/fd35b8f337d3856bc83bf7a995edbf6e_1776879986.css — 200 — 10.7 KiB — 64 ms — http/1.1https://www.arrl.org/js/packed/4b1e36f83acf011ab91c2a6e757af96f_1776880331.jswww.arrl.org/js/packed/4b1e36f83acf... https://www.arrl.org/js/packed/4b1e36f83acf011ab91c2a6e757af96f_1776880331.js — 200 — 150.1 KiB — 167 ms — 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https://analytics.google.com/g/collect?v=2&tid=G-EJ3Z6E6BZ8&gtm=45je64k1v9113946314za20gzb834328947zd834328947&_p=1776901621886&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAgAAGQ&are=1&cid=922011214.1776901622&frm=0&pscdl=noapi&rcb=14&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&tag_exp=0~115616986~115938466~115938469~117266400~117512542&sid=1776901622&sct=1&seg=0&dl=https%3A%2F%2Fwww.arrl.org%2F&dt=ARRL%20-%20Home&_s=3&tfd=7040 — 204 — 48 B — 28 ms — h2https://ads.arrl.org/images/19fc40707a48c7a80f0df30320fb72d3.pngads.arrl.org/images/19fc40707a48c7a... https://ads.arrl.org/images/19fc40707a48c7a80f0df30320fb72d3.png — 200 — 533.3 KiB — 48 ms — http/1.1https://ads.arrl.org/delivery/lg.php?bannerid=498&campaignid=231&zoneid=1&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=f3ec51778dads.arrl.org/delivery/lg.php?banner... https://ads.arrl.org/delivery/lg.php?bannerid=498&campaignid=231&zoneid=1&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=f3ec51778d — 200 — 597 B — 4.9 s — http/1.1https://ads.arrl.org/delivery/ajs.php?zoneid=53&cb=67967130107&charset=UTF-8&loc=https%3A//www.arrl.org/ads.arrl.org/delivery/ajs.php?zonei... https://ads.arrl.org/delivery/ajs.php?zoneid=53&cb=67967130107&charset=UTF-8&loc=https%3A//www.arrl.org/ — 200 — 1.4 KiB — 5.0 s — http/1.1https://ads.arrl.org/images/65de059011c1ad6ad5e166412a792394.gifads.arrl.org/images/65de059011c1ad6... https://ads.arrl.org/images/65de059011c1ad6ad5e166412a792394.gif — 200 — 931.9 KiB — 61 ms — http/1.1https://ads.arrl.org/delivery/lg.php?bannerid=363&campaignid=111&zoneid=53&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=b839f948e7ads.arrl.org/delivery/lg.php?banner... https://ads.arrl.org/delivery/lg.php?bannerid=363&campaignid=111&zoneid=53&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=b839f948e7 — 200 — 596 B — 5.4 s — http/1.1https://ads.arrl.org/delivery/ajs.php?zoneid=4&cb=33407746434&charset=UTF-8&loc=https%3A//www.arrl.org/ads.arrl.org/delivery/ajs.php?zonei... https://ads.arrl.org/delivery/ajs.php?zoneid=4&cb=33407746434&charset=UTF-8&loc=https%3A//www.arrl.org/ — 200 — 1.4 KiB — 5.4 s — http/1.1https://ads.arrl.org/images/cd5673b3c9ed35cd71ebdff63937c7e2.pngads.arrl.org/images/cd5673b3c9ed35c... https://ads.arrl.org/images/cd5673b3c9ed35cd71ebdff63937c7e2.png — 200 — 406.2 KiB — 40 ms — http/1.1https://ads.arrl.org/delivery/lg.php?bannerid=499&campaignid=231&zoneid=4&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=7565b30365ads.arrl.org/delivery/lg.php?banner... https://ads.arrl.org/delivery/lg.php?bannerid=499&campaignid=231&zoneid=4&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=7565b30365 — 200 — 597 B — 8.8 s — http/1.1https://ads.arrl.org/delivery/ajs.php?zoneid=51&cb=55045269593&charset=UTF-8&loc=https%3A//www.arrl.org/ads.arrl.org/delivery/ajs.php?zonei... https://ads.arrl.org/delivery/ajs.php?zoneid=51&cb=55045269593&charset=UTF-8&loc=https%3A//www.arrl.org/ — 200 — 982 B — 8.8 s — http/1.1https://ads.arrl.org/delivery/lg.php?bannerid=0&campaignid=0&zoneid=51&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=962f282289ads.arrl.org/delivery/lg.php?banner... https://ads.arrl.org/delivery/lg.php?bannerid=0&campaignid=0&zoneid=51&loc=https%3A%2F%2Fwww.arrl.org%2F&cb=962f282289 — 200 — 596 B — 8.5 s — http/1.1https://ep1.adtrafficquality.google/getconfig/sodar?sv=200&tid=gda&tv=r20260421&st=env&sjk=4231917525961569ep1.adtrafficquality.google/getconf... https://ep1.adtrafficquality.google/getconfig/sodar?sv=200&tid=gda&tv=r20260421&st=env&sjk=4231917525961569 — 200 — 13.0 KiB — 46 ms — h3https://www.arrl.org/favicon.icowww.arrl.org/favicon.ico https://www.arrl.org/favicon.ico — 200 — 1.1 KiB — 73 ms — http/1.1https://ep2.adtrafficquality.google/sodar/sodar2.jsep2.adtrafficquality.google/sodar/s... https://ep2.adtrafficquality.google/sodar/sodar2.js — 200 — 7.9 KiB — 29 ms — h2https://ep2.adtrafficquality.google/sodar/sodar2/254/runner.htmlep2.adtrafficquality.google/sodar/s... https://ep2.adtrafficquality.google/sodar/sodar2/254/runner.html — 200 — 5.8 KiB — 27 ms — h2https://www.google.com/recaptcha/api2/aframewww.google.com/recaptcha/api2/afram... https://www.google.com/recaptcha/api2/aframe — 200 — 567 B — 44 ms — h3https://www.arrl.org/favicon.icowww.arrl.org/favicon.ico https://www.arrl.org/favicon.ico — 200 — 0 B — 2 ms — http/1.1https://www.arrl.org/favicon.icowww.arrl.org/favicon.ico https://www.arrl.org/favicon.ico — 200 — 0 B — 3 ms — http/1.1https://www.arrl.org/favicon.icowww.arrl.org/favicon.ico https://www.arrl.org/favicon.ico — 200 — 0 B — 5 ms — http/1.1https://pagead2.googlesyndication.com/bg/6u4cjZJ6xo3e9mwcSLvMY6cXkaRwmTskeynnxfNWQwA.jspagead2.googlesyndication.com/bg/6u... https://pagead2.googlesyndication.com/bg/6u4cjZJ6xo3e9mwcSLvMY6cXkaRwmTskeynnxfNWQwA.js — 200 — 21.9 KiB — 25 ms — h3https://pagead2.googlesyndication.com/pagead/sodar?id=sodar2&v=254&li=gda_r20260421&jk=4231917525961569&rc=pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/sodar?id=sodar2&v=254&li=gda_r20260421&jk=4231917525961569&rc= — 204 — 17 B — 23 ms — h3https://ep2.adtrafficquality.google/generate_204?l92t9Aep2.adtrafficquality.google/generat... https://ep2.adtrafficquality.google/generate_204?l92t9A — 204 — 40 B — 5 ms — h2https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=gda_r20260421&jk=4231917525961569&bg=!w8ClwKLNAAa1ilLUlYo7AEcBe5WfOIIfR-iwQwqn84wmXn9R-BL4IND0LCL-JzH-NHcXBLXEJr2jDXF9IIhvz0xuCW3sUn676XsHkOvaiwyVN_vDFlKL2QIAAABgUgAAAAVoAQd-ADY97gjOMtLs6eq0e-3523UVhY9h-sHn94tgI6GIxng-9Z7Vrlx3k9tpOxK67l7ZPtO6ljyIrlCZApt5gTnABXvQeVbbAvLnTUYq9qW_esxmy49X3vrWgG-TgVaP5FSyL3fk3vQz81O7i2O8VogOL4FsV9MsSkXI7b3JXOgO9c7E4nQ_TL_NNN0ojlNj9LV54EtAM_oweqsBbqtG0ILKhTnvAWV1Kkligf0wEdmfpNI175P4NhcUM9SNLIhrtCLzrGMePVwauP9E9Q-zY1fHw0s6501it2zoDEhcydkmHjrpwM8Ju9RiTLzMU_jroY5JclMAx8ohY6VCDrTZXSubbYJ1gpaMbhH3yM2MPoMDBEvqx-h73IcNDTZd_7V4wtEulzpeFdDhoHW9M50eAgwzraOnMXf4y4wsGP-QtNXedGLllVmz4k77fO49a5TN1symBdDcS0K16hv-x46mtgGhRxbv3SsFeYaDJwr1pP9zX2bJVNDqZhwT9JgOsnQjd1QsueKv3v6NWS5UtuZ3KeqIikhrizjoxFNGbHGWPKAMpsDb16wfEoL2YWfFPVXQmhuzsnWaV4tMSnSQWxzju21R3esHGgLlxr9LYsXExEXWU5Mz8ruuYbKx0BTu3JFrNwbI8_nCr5DbQZ-ZbKcz-wcub3IhS4Rr5oxENMuZzq8grfGnWjh6NQQL60QN16NHOYnan85UbTC8XuHh98ChVAMX4pnP_qjC8lkQ9r-RxO0pFXBlmcgFiIiLcxKvFArmcOVpAA1loHKC-OahQyoOB5rNthtCv7eT0GHQNij43v0LYuxgSMcCjc4nqBrebG2IEcRCEXs9azIixnu0C_PsstOHXswPxqktL2FJoSaEgWmKbMCr4k86vjL2yNypknLxyC8-dag-QZOoU8aDQkRhudYenKPguw7TPfBjHTW4QNAPUNwIBEEPkVV1DzhpWqIg_b8_en8O6j2jep1.adtrafficquality.google/pagead/... https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=gda_r20260421&jk=4231917525961569&bg=!w8ClwKLNAAa1ilLUlYo7AEcBe5WfOIIfR-iwQwqn84wmXn9R-BL4IND0LCL-JzH-NHcXBLXEJr2jDXF9IIhvz0xuCW3sUn676XsHkOvaiwyVN_vDFlKL2QIAAABgUgAAAAVoAQd-ADY97gjOMtLs6eq0e-3523UVhY9h-sHn94tgI6GIxng-9Z7Vrlx3k9tpOxK67l7ZPtO6ljyIrlCZApt5gTnABXvQeVbbAvLnTUYq9qW_esxmy49X3vrWgG-TgVaP5FSyL3fk3vQz81O7i2O8VogOL4FsV9MsSkXI7b3JXOgO9c7E4nQ_TL_NNN0ojlNj9LV54EtAM_oweqsBbqtG0ILKhTnvAWV1Kkligf0wEdmfpNI175P4NhcUM9SNLIhrtCLzrGMePVwauP9E9Q-zY1fHw0s6501it2zoDEhcydkmHjrpwM8Ju9RiTLzMU_jroY5JclMAx8ohY6VCDrTZXSubbYJ1gpaMbhH3yM2MPoMDBEvqx-h73IcNDTZd_7V4wtEulzpeFdDhoHW9M50eAgwzraOnMXf4y4wsGP-QtNXedGLllVmz4k77fO49a5TN1symBdDcS0K16hv-x46mtgGhRxbv3SsFeYaDJwr1pP9zX2bJVNDqZhwT9JgOsnQjd1QsueKv3v6NWS5UtuZ3KeqIikhrizjoxFNGbHGWPKAMpsDb16wfEoL2YWfFPVXQmhuzsnWaV4tMSnSQWxzju21R3esHGgLlxr9LYsXExEXWU5Mz8ruuYbKx0BTu3JFrNwbI8_nCr5DbQZ-ZbKcz-wcub3IhS4Rr5oxENMuZzq8grfGnWjh6NQQL60QN16NHOYnan85UbTC8XuHh98ChVAMX4pnP_qjC8lkQ9r-RxO0pFXBlmcgFiIiLcxKvFArmcOVpAA1loHKC-OahQyoOB5rNthtCv7eT0GHQNij43v0LYuxgSMcCjc4nqBrebG2IEcRCEXs9azIixnu0C_PsstOHXswPxqktL2FJoSaEgWmKbMCr4k86vjL2yNypknLxyC8-dag-QZOoU8aDQkRhudYenKPguw7TPfBjHTW4QNAPUNwIBEEPkVV1DzhpWqIg_b8_en8O6j2j — 204 — 17 B — 40 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 5149ms · 1089KB · $17/mo
cdn.informz.net
Other
Costly
Execution 1461ms
Transfer 22 KB
Monthly Cost $5/mo
Unattributable
Other
Costly
Execution 862ms
Transfer 0 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 567ms
Transfer 138 KB
Unused 49%
Monthly Cost $2/mo
pagead2.googlesyndication.com
Other
Costly
Execution 505ms
Transfer 177 KB
Unused 77%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 472ms
Transfer 176 KB
Unused 39%
Monthly Cost $2/mo
www.arrl.org
Other
Costly
Execution 432ms
Transfer 12 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Costly
Execution 409ms
Transfer 176 KB
Unused 39%
Monthly Cost $1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 176ms
Transfer 54 KB
Unused 53%
Monthly Cost $1/mo
www.arrl.org
Other
Optional
Execution 115ms
Transfer 150 KB
Unused 64%
Monthly Cost $0/mo
Google Tag Manager
Tag Manager
Optional
Execution 99ms
Transfer 176 KB
Unused 65%
Monthly Cost $0/mo
ep2.adtrafficquality.google
Other
Optional
Execution 50ms
Transfer 8 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • cdn.informz.net adds 1461ms and costs ~$5/month
  • Unattributable adds 862ms and costs ~$3/month
  • Google Tag Manager adds 567ms and costs ~$2/month
  • pagead2.googlesyndication.com adds 505ms and costs ~$2/month
  • Google Tag Manager adds 472ms and costs ~$2/month
  • www.arrl.org adds 432ms and costs ~$1/month
  • Google Tag Manager adds 409ms and costs ~$1/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

cdn.informz.net takes 1461ms 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

Unattributable takes 862ms 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

Google Tag Manager takes 567ms 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

pagead2.googlesyndication.com takes 505ms 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

77% of pagead2.googlesyndication.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Google Tag Manager takes 472ms 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

www.arrl.org takes 432ms 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

Google Tag Manager takes 409ms 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

53% of pagead2.googlesyndication.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

64% of www.arrl.org's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

65% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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.

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