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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
0
PASS
11
INFO
2

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
45
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.

284 ms

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

912 ms

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

24 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.

434 ms

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

912 ms

Page Load Progression

432 ms
865 ms
1.3 s
1.7 s
2.2 s
2.6 s
3.0 s
3.5 s
Checks
15
11 PASS 2 FIX
D
Third-Party Impact
Action
80% third-party, 0 ms blocking
FIX
80% third-party, 0 ms blocking
Warning::
Third-party code accounts for 80% of page weight (420.5 KiB of 524.7 KiB)
Info::
Third-party blocking time is low (0 ms)
20%
80%
First-party Third-party
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.

A+
Page Weight Budget
525 KB transferred, 24 requests
PASS
525 KB transferred, 24 requests
Info::
Page weighs 944 KB (525 KB transferred)
Info::
24 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
525 KB / 2.4 MB budget
525 KB transferred
24 requests
0.11 g CO2 per page load
Other 316.9 KiB 60%
HTML 100.0 KiB 19%
JavaScript 92.3 KiB 18%
Other 6.9 KiB 1%
Images 6.9 KiB 1%
Other 1.7 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 7 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
413ms total JS execution
PASS
413ms total JS execution
Warning::
https://aei.org/cdn-cgi/challenge-platform/h/b/orc...: 361ms CPU time
Info::
Unattributable: 52ms CPU time
Info::
Third-party scripts: 52ms (13% of total)

Main Thread Breakdown

Script Evaluation 80% Other 13%
ScriptTotalScriptingParse/CompileParty
https://aei.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f075ca7ae5bebb2361ms345ms5ms1st
Unattributable52ms2ms0ms3rd
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
12 scripts, 0 KB unused
PASS
12 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://aei.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js4 KB—✓1st
https://aei.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f075ca7ae5bebb271 KB—✓1st
blob:https://aei.org/d8f63145-5eff-4d75-8b40-bf54f53d40020 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://aei.org/9c40eed6-1ff8-4b0b-80f3-8c0d220b6d69-0 KB—✓3rd
blob:https://challenges.cloudflare.com/e979a299-5c2e-42f3-9a21-4cff955cf1d20 KB—✓3rd
blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e620 KB—✓3rd
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
24 resources · 525 KB · 0 KB savings available
PASS
24 resources · 525 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 525 KB
Warning::
16 third-party resources (80% of weight)
Info::
1 resources over 200KB
24 resources · 524.7 KiB · 16 third-party Within 1MB page-weight target
Other 61% · 318.6 KiB
Document 20% · 106.9 KiB
JavaScript 18% · 92.3 KiB
Image 1% · 6.9 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
24 requests over 3030ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 284 ms LCP 912 mshttps://aei.org// https://aei.org/ — 307 — 57 B — 64 ms — http/1.1https://aei.org// https://aei.org/ — 403 — 3.4 KiB — 23 ms — h2https://aei.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js/cdn-cgi/scripts/7d0fa10a/cloudflar... https://aei.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js — 200 — 3.9 KiB — 22 ms — h2https://aei.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f075ca7ae5bebb2/cdn-cgi/challenge-platform/h/b/orc... https://aei.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f075ca7ae5bebb2 — 200 — 71.0 KiB — 34 ms — h2https://aei.org/favicon.ico/favicon.ico https://aei.org/favicon.ico — 403 — 3.5 KiB — 28 ms — h2blob:https://aei.org/d8f63145-5eff-4d75-8b40-bf54f53d4002aei.org/d8f63145-5eff-4d75-8b40-bf5... blob:https://aei.org/d8f63145-5eff-4d75-8b40-bf54f53d4002 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit — 200 — 17.4 KiB — 63 ms — h3https://aei.org/favicon.ico/favicon.ico https://aei.org/favicon.ico — 403 — 5.4 KiB — 25 ms — h2https://aei.org/favicon.ico/favicon.ico https://aei.org/favicon.ico — 403 — 3.4 KiB — 36 ms — h2https://aei.org/cdn-cgi/challenge-platform/h/b/flow/ov1/2574961096:1776888745:P4hk-3o_RhsRQQX88q8VNO601T4pZszmFrMeGiReD2Q/9f075ca7ae5bebb2/72izKOS63HJeB8Ga2G4H8EKDq1_WvDNZa87vagDTKjU-1776889570-1.2.1.1-0oKvE1awqFtgARkg76MrvsrKaw4WNYRstw6OEC9vZMLai06WtY1ssHl7j3ICJ1tP/cdn-cgi/challenge-platform/h/b/flo... https://aei.org/cdn-cgi/challenge-platform/h/b/flow/ov1/2574961096:1776888745:P4hk-3o_RhsRQQX88q8VNO601T4pZszmFrMeGiReD2Q/9f075ca7ae5bebb2/72izKOS63HJeB8Ga2G4H8EKDq1_WvDNZa87vagDTKjU-1776889570-1.2.1.1-0oKvE1awqFtgARkg76MrvsrKaw4WNYRstw6OEC9vZMLai06WtY1ssHl7j3ICJ1tP — 200 — 13.5 KiB — 34 ms — h2blob:https://aei.org/9c40eed6-1ff8-4b0b-80f3-8c0d220b6d69aei.org/9c40eed6-1ff8-4b0b-80f3-8c0... blob:https://aei.org/9c40eed6-1ff8-4b0b-80f3-8c0d220b6d69 — 200 — -1 B — 32 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/jizsp/0x4AAAAAAAAjq6WYeRDKmebM/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/jizsp/0x4AAAAAAAAjq6WYeRDKmebM/light/fbE/new/normal?lang=auto — 200 — 96.6 KiB — 109 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1 — 200 — 208 B — 21 ms — h3blob:https://challenges.cloudflare.com/e979a299-5c2e-42f3-9a21-4cff955cf1d2challenges.cloudflare.com/e979a299-... blob:https://challenges.cloudflare.com/e979a299-5c2e-42f3-9a21-4cff955cf1d2 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2461874605:1776885205:fNEyEjrf0sS0M46VGAbg94TJe9j7x0rcIXeX7-8JsUc/9f075caa4e9d6f27/iwvUkw7urtPnsRiVIBGWuiLXT9N_bQRe.2P8ioQvE9g-1776889570-1.2.1.1-fbHBLq6iV.5nzNOuaYf5VdU6fTlx5d888obDaQs7Mgcz7rZ.igu2ySR6Gy5GC.rYchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2461874605:1776885205:fNEyEjrf0sS0M46VGAbg94TJe9j7x0rcIXeX7-8JsUc/9f075caa4e9d6f27/iwvUkw7urtPnsRiVIBGWuiLXT9N_bQRe.2P8ioQvE9g-1776889570-1.2.1.1-fbHBLq6iV.5nzNOuaYf5VdU6fTlx5d888obDaQs7Mgcz7rZ.igu2ySR6Gy5GC.rY — 200 — 280.6 KiB — 167 ms — h3blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62challenges.cloudflare.com/d3c0a543-... blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62 — 200 — -1 B — 18 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9f075caa4e9d6f27/1776889571241/E8_M1rIRBY-Qhfichallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9f075caa4e9d6f27/1776889571241/E8_M1rIRBY-Qhfi — 200 — 1.3 KiB — 22 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9f075caa4e9d6f27/1776889571242/a56e5c58426c4fe96828640677207ccb14d3f141dffbcce3cd2fd8b93c67ce22/1D7k6bB6i34K-cfchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9f075caa4e9d6f27/1776889571242/a56e5c58426c4fe96828640677207ccb14d3f141dffbcce3cd2fd8b93c67ce22/1D7k6bB6i34K-cf — 401 — 1.7 KiB — 22 ms — h3blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62challenges.cloudflare.com/d3c0a543-... blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62 — 200 — -1 B — 16 ms — blobblob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62challenges.cloudflare.com/d3c0a543-... blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62 — 200 — -1 B — 30 ms — blobblob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62challenges.cloudflare.com/d3c0a543-... blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62 — -1 — 0 B — 0 ms — blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62challenges.cloudflare.com/d3c0a543-... blob:https://challenges.cloudflare.com/d3c0a543-f3be-4f97-81ea-4f9deb923e62 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2461874605:1776885205:fNEyEjrf0sS0M46VGAbg94TJe9j7x0rcIXeX7-8JsUc/9f075caa4e9d6f27/iwvUkw7urtPnsRiVIBGWuiLXT9N_bQRe.2P8ioQvE9g-1776889570-1.2.1.1-fbHBLq6iV.5nzNOuaYf5VdU6fTlx5d888obDaQs7Mgcz7rZ.igu2ySR6Gy5GC.rYchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2461874605:1776885205:fNEyEjrf0sS0M46VGAbg94TJe9j7x0rcIXeX7-8JsUc/9f075caa4e9d6f27/iwvUkw7urtPnsRiVIBGWuiLXT9N_bQRe.2P8ioQvE9g-1776889570-1.2.1.1-fbHBLq6iV.5nzNOuaYf5VdU6fTlx5d888obDaQs7Mgcz7rZ.igu2ySR6Gy5GC.rY — 200 — 22.8 KiB — 59 ms — h3blob:https://challenges.cloudflare.com/6328b97f-2ba3-4a2b-acfb-02991debdc22challenges.cloudflare.com/6328b97f-... blob:https://challenges.cloudflare.com/6328b97f-2ba3-4a2b-acfb-02991debdc22 — 200 — -1 B — 17 ms — blob
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
13% of JavaScript execution is third-party
First-party Third-party 52ms · 0KB · $1/mo
Unattributable
Other
Optional
Execution 52ms
Transfer 0 KB
Monthly Cost $1/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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