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https://opensea.io

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.
40
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.

292 ms

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

828 ms

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

13 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.

363 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.

828 ms

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
15
11 PASS 2 FIX
D
Third-Party Impact
Action
78% third-party, 0 ms blocking
FIX
78% third-party, 0 ms blocking
Warning::
Third-party code accounts for 78% of page weight (384.0 KiB of 490.4 KiB)
Info::
Third-party blocking time is low (0 ms)
22%
78%
First-party Third-party
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
post-check0
pre-check0
A+
Page Weight Budget
490 KB transferred, 22 requests
PASS
490 KB transferred, 22 requests
Info::
Page weighs 911 KB (490 KB transferred)
Info::
22 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
490 KB / 2.4 MB budget
490 KB transferred
22 requests
0.10 g CO2 per page load
Other 278.0 KiB 57%
HTML 102.3 KiB 21%
JavaScript 89.5 KiB 18%
Images 12.0 KiB 2%
Other 7.0 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 12 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
424ms total JS execution
PASS
424ms total JS execution
Warning::
https://opensea.io/cdn-cgi/challenge-platform/h/b/...: 256ms CPU time
Info::
https://opensea.io/: 112ms CPU time
Info::
Unattributable: 56ms CPU time
Info::
Third-party scripts: 56ms (13% of total)

Main Thread Breakdown

Script Evaluation 61% Other 24% Style & Layout 7% Garbage Collection 3% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://opensea.io/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff8147aca76f82256ms244ms4ms1st
https://opensea.io/112ms2ms0ms1st
Unattributable56ms1ms0ms3rd
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
10 scripts, 0 KB unused
PASS
10 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://opensea.io/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff8147aca76f8272 KB—✓1st
blob:https://opensea.io/aedfde75-9342-4760-a102-b816e0ca03f70 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://opensea.io/16d52a2a-f036-4438-9c35-61839b6f599b-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d8b0ed8a-0671-4859-9e80-e8476aa108080 KB—✓3rd
blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c-0 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
22 resources · 490 KB · 0 KB savings available
PASS
22 resources · 490 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 490 KB
Warning::
15 third-party resources (78% of weight)
Info::
1 resources over 200KB
22 resources · 490.4 KiB · 15 third-party Within 1MB page-weight target
Other 56% · 275.1 KiB
Document 23% · 113.8 KiB
JavaScript 18% · 89.5 KiB
Image 2% · 12.0 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
22 requests over 2778ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 292 ms LCP 828 mshttps://opensea.io// https://opensea.io/ — 307 — 60 B — 77 ms — http/1.1https://opensea.io// https://opensea.io/ — 403 — 6.4 KiB — 27 ms — h3https://opensea.io/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff8147aca76f82/cdn-cgi/challenge-platform/h/b/orc... https://opensea.io/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9eff8147aca76f82 — 200 — 72.1 KiB — 83 ms — h3blob:https://opensea.io/aedfde75-9342-4760-a102-b816e0ca03f7opensea.io/aedfde75-9342-4760-a102-... blob:https://opensea.io/aedfde75-9342-4760-a102-b816e0ca03f7 — -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 — 62 ms — h3https://opensea.io/favicon.ico/favicon.ico https://opensea.io/favicon.ico — 403 — 7.8 KiB — 29 ms — h3https://opensea.io/favicon.ico/favicon.ico https://opensea.io/favicon.ico — 403 — 7.0 KiB — 27 ms — h3https://opensea.io/cdn-cgi/challenge-platform/h/b/flow/ov1/3741502405:1776806027:0Fi3Q_TuDIf5I1VqwTgiBtpYqLcmIrt4g33J3_hOYx8/9eff8147aca76f82/vWzfGoKhMM3zYq64VMvVW5m0Tn4VBe9Rpw3YScmP4AQ-1776807184-1.2.1.1-L2M2jH0vSF2nh4i60d0PPmS1GUT0Hc.bIwOQsZWyVusUL8kPTsfUQlIDTp7KA408/cdn-cgi/challenge-platform/h/b/flo... https://opensea.io/cdn-cgi/challenge-platform/h/b/flow/ov1/3741502405:1776806027:0Fi3Q_TuDIf5I1VqwTgiBtpYqLcmIrt4g33J3_hOYx8/9eff8147aca76f82/vWzfGoKhMM3zYq64VMvVW5m0Tn4VBe9Rpw3YScmP4AQ-1776807184-1.2.1.1-L2M2jH0vSF2nh4i60d0PPmS1GUT0Hc.bIwOQsZWyVusUL8kPTsfUQlIDTp7KA408 — 200 — 13.1 KiB — 41 ms — h3blob:https://opensea.io/16d52a2a-f036-4438-9c35-61839b6f599bopensea.io/16d52a2a-f036-4438-9c35-... blob:https://opensea.io/16d52a2a-f036-4438-9c35-61839b6f599b — 200 — -1 B — 26 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/d3hcd/0x4AAAAAAADnOjc0PNeA8qVm/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/d3hcd/0x4AAAAAAADnOjc0PNeA8qVm/light/fbE/new/normal?lang=auto — 200 — 95.9 KiB — 99 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/d8b0ed8a-0671-4859-9e80-e8476aa10808challenges.cloudflare.com/d8b0ed8a-... blob:https://challenges.cloudflare.com/d8b0ed8a-0671-4859-9e80-e8476aa10808 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2249653517:1776806029:cpnPR9arugYgpdtrlcDYvf3QVXOFNte8JQPqi0lECTw/9eff814a4d4cdec7/DvQO51mOseJ3G.8e22WApdN4Ki7UFs9.U7CLx3dHcjE-1776807185-1.2.1.1-1sZ1uBWxV_Tkr.Q6fm62Jhw0vqQVAxANtoXg3ulq9AAr9Bqk5Y.SpO_kS217X0mfchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2249653517:1776806029:cpnPR9arugYgpdtrlcDYvf3QVXOFNte8JQPqi0lECTw/9eff814a4d4cdec7/DvQO51mOseJ3G.8e22WApdN4Ki7UFs9.U7CLx3dHcjE-1776807185-1.2.1.1-1sZ1uBWxV_Tkr.Q6fm62Jhw0vqQVAxANtoXg3ulq9AAr9Bqk5Y.SpO_kS217X0mf — 200 — 260.3 KiB — 138 ms — h3blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0cchallenges.cloudflare.com/d76d8e57-... blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c — 200 — -1 B — 13 ms — blobblob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0cchallenges.cloudflare.com/d76d8e57-... blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c — 200 — -1 B — 39 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9eff814a4d4cdec7/1776807185305/ifI7e-Z0on3BOTNchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9eff814a4d4cdec7/1776807185305/ifI7e-Z0on3BOTN — 200 — 4.0 KiB — 21 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9eff814a4d4cdec7/1776807185305/8e9ef80799cbfa7e5840db6f9bcdb3775d3c8341745352497bdc86eba90cfe63/LTxWaf-B0Ii7wI5challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9eff814a4d4cdec7/1776807185305/8e9ef80799cbfa7e5840db6f9bcdb3775d3c8341745352497bdc86eba90cfe63/LTxWaf-B0Ii7wI5 — 401 — 1.7 KiB — 21 ms — h3blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0cchallenges.cloudflare.com/d76d8e57-... blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c — 200 — -1 B — 31 ms — blobblob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0cchallenges.cloudflare.com/d76d8e57-... blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c — 200 — -1 B — 26 ms — blobblob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0cchallenges.cloudflare.com/d76d8e57-... blob:https://challenges.cloudflare.com/d76d8e57-ee7d-4f94-a74f-7bc232a2ab0c — 200 — -1 B — 28 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2249653517:1776806029:cpnPR9arugYgpdtrlcDYvf3QVXOFNte8JQPqi0lECTw/9eff814a4d4cdec7/DvQO51mOseJ3G.8e22WApdN4Ki7UFs9.U7CLx3dHcjE-1776807185-1.2.1.1-1sZ1uBWxV_Tkr.Q6fm62Jhw0vqQVAxANtoXg3ulq9AAr9Bqk5Y.SpO_kS217X0mfchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2249653517:1776806029:cpnPR9arugYgpdtrlcDYvf3QVXOFNte8JQPqi0lECTw/9eff814a4d4cdec7/DvQO51mOseJ3G.8e22WApdN4Ki7UFs9.U7CLx3dHcjE-1776807185-1.2.1.1-1sZ1uBWxV_Tkr.Q6fm62Jhw0vqQVAxANtoXg3ulq9AAr9Bqk5Y.SpO_kS217X0mf — 200 — 4.6 KiB — 37 ms — h3https://opensea.io/cdn-cgi/challenge-platform/h/b/flow/ov1/3741502405:1776806027:0Fi3Q_TuDIf5I1VqwTgiBtpYqLcmIrt4g33J3_hOYx8/9eff8147aca76f82/vWzfGoKhMM3zYq64VMvVW5m0Tn4VBe9Rpw3YScmP4AQ-1776807184-1.2.1.1-L2M2jH0vSF2nh4i60d0PPmS1GUT0Hc.bIwOQsZWyVusUL8kPTsfUQlIDTp7KA408/cdn-cgi/challenge-platform/h/b/flo... https://opensea.io/cdn-cgi/challenge-platform/h/b/flow/ov1/3741502405:1776806027:0Fi3Q_TuDIf5I1VqwTgiBtpYqLcmIrt4g33J3_hOYx8/9eff8147aca76f82/vWzfGoKhMM3zYq64VMvVW5m0Tn4VBe9Rpw3YScmP4AQ-1776807184-1.2.1.1-L2M2jH0vSF2nh4i60d0PPmS1GUT0Hc.bIwOQsZWyVusUL8kPTsfUQlIDTp7KA408 — -1 — 0 B — 0 ms —
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 56ms · 0KB · $1/mo
Unattributable
Other
Optional
Execution 56ms
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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