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https://fanlore.org

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
2
REVIEW
5
PASS
16
INFO
4

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

Mobile Desktop
64
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.

931 ms

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

3.12 s

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

15.64 s

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

0.003

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

1.27 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.

21.42 s

Page Load Progression

482 ms
963 ms
1.4 s
1.9 s
2.4 s
2.9 s
3.4 s
3.9 s
Checks
27
16 PASS 5 REVIEW 2 FIX
D
Third-Party Impact
Action
81% third-party, 0 ms blocking
FIX
81% third-party, 0 ms blocking
Warning::
Third-party code accounts for 81% of page weight (490.7 KiB of 608.7 KiB)
Info::
Third-party blocking time is low (0 ms)
19%
81%
First-party Third-party
F
JS Execution Cost
Action
21090ms total JS execution
FIX
21090ms total JS execution
Warning::
https://fanlore.org/cdn-cgi/challenge-platform/h/b...: 19673ms CPU time
Warning::
Unattributable: 982ms CPU time
Warning::
https://challenges.cloudflare.com/turnstile/v0/b/3...: 255ms CPU time
Info::
https://fanlore.org/: 179ms CPU time
Info::
Third-party scripts: 255ms (1% of total)

Main Thread Breakdown

Script Evaluation 94% Other 4%
ScriptTotalScriptingParse/CompileParty
https://fanlore.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=a2013c42dc0f0f8519673ms19346ms37ms1st
Unattributable982ms240ms0ms1st
https://challenges.cloudflare.com/turnstile/v0/b/3104729c556c/api.js?onload=WBul8&render=explicit255ms205ms13ms3rd
https://fanlore.org/179ms19ms3ms1st
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.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
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.
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
1 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.
Warning::
Total JS execution time is 21.1 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
B
HTTP Caching
s-maxage=1200, must-revalidate, max-age=0
REVIEW
s-maxage=1200, must-revalidate, max-age=0
Info::
Cache-Control header is set
Got: s-maxage=1200, must-revalidate, max-age=0
Info::
CDN TTL: 20 minutes (s-maxage=1200)
Info::
Last-Modified header present
Cache-Control

s-maxage=1200, must-revalidate, max-age=0

DirectiveValueMeaning
s-maxage1200CDN caches for 20 minutes
must-revalidate—Must recheck with server after expiry
max-age0Cache for 0 seconds
A+
Page Weight Budget
609 KB transferred, 20 requests
PASS
609 KB transferred, 20 requests
Info::
Page weighs 1.2 MB (609 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.12 g CO2 per page load
609 KB / 2.4 MB budget
609 KB transferred
20 requests
0.12 g CO2 per page load
Other 388.3 KiB 64%
HTML 102.2 KiB 17%
JavaScript 99.1 KiB 16%
Images 12.2 KiB 2%
Other 4.8 KiB 1%
Other 2.2 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
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 12 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
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
9 scripts, 0 KB unused
PASS
9 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://fanlore.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=a2013c42dc0f0f8575 KB—✓1st
blob:https://fanlore.org/ee0c78a3-4b1f-42c5-8e7b-a32ce22a351f0 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/3104729c556c/api.js?onload=WBul8&render=explicit24 KB—✓3rd
blob:https://fanlore.org/092b9a99-b353-476c-93f8-2a255067b69e-0 KB—✓3rd
blob:https://challenges.cloudflare.com/ad077931-9811-47ee-a735-a1368442ce260 KB—✓3rd
blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962b-0 KB—✓3rd
blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962b-0 KB—✓3rd
blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962b-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d38fa9e2-1e89-4b64-ab56-4037708fac47-0 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+
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+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: s-maxage=1200, must-revalidate, max-age=0
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
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
Page Weight Inventory
20 resources · 609 KB · 0 KB savings available
PASS
20 resources · 609 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 609 KB
Warning::
14 third-party resources (81% of weight)
Info::
1 resources over 200KB
20 resources · 608.7 KiB · 14 third-party Within 1MB page-weight target
Other 64% · 390.6 KiB
Document 18% · 106.9 KiB
JavaScript 16% · 99.1 KiB
Image 2% · 12.2 KiB
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+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
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
20 requests over 3437ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 931 ms LCP 3.1 shttps://fanlore.org// https://fanlore.org/ — 307 — 61 B — 24 ms — http/1.1https://fanlore.org// https://fanlore.org/ — 403 — 3.9 KiB — 9 ms — h2https://fanlore.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=a2013c42dc0f0f85/cdn-cgi/challenge-platform/h/b/orc... https://fanlore.org/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=a2013c42dc0f0f85 — 200 — 75.1 KiB — 32 ms — h2blob:https://fanlore.org/ee0c78a3-4b1f-42c5-8e7b-a32ce22a351ffanlore.org/ee0c78a3-4b1f-42c5-8e7b... blob:https://fanlore.org/ee0c78a3-4b1f-42c5-8e7b-a32ce22a351f — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/3104729c556c/api.js?onload=WBul8&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/3104729c556c/api.js?onload=WBul8&render=explicit — 200 — 24.0 KiB — 23 ms — h3https://fanlore.org/favicon.ico/favicon.ico https://fanlore.org/favicon.ico — 403 — 6.0 KiB — 14 ms — h2https://fanlore.org/favicon.ico/favicon.ico https://fanlore.org/favicon.ico — 403 — 4.7 KiB — 10 ms — h2https://fanlore.org/cdn-cgi/challenge-platform/h/b/fo/764481460:1784877314:a7YgSV4cn-j74HPijiI4d76LGezTrFfBqsBt2UDzzDs/a2013c42dc0f0f85/x4fOGs8QqQ0z5bMNKt3cdb339iVl6YDOJpN3JFpnjWw-1784878392-1.2.1.1-in3BfrRzowX6hVFk_qkJPNkM9U0iXtgfduhebd0mQsQF0B4SMI6EaXCLMKP5R.9k/cdn-cgi/challenge-platform/h/b/fo/... https://fanlore.org/cdn-cgi/challenge-platform/h/b/fo/764481460:1784877314:a7YgSV4cn-j74HPijiI4d76LGezTrFfBqsBt2UDzzDs/a2013c42dc0f0f85/x4fOGs8QqQ0z5bMNKt3cdb339iVl6YDOJpN3JFpnjWw-1784878392-1.2.1.1-in3BfrRzowX6hVFk_qkJPNkM9U0iXtgfduhebd0mQsQF0B4SMI6EaXCLMKP5R.9k — 200 — 28.2 KiB — 27 ms — h2blob:https://fanlore.org/092b9a99-b353-476c-93f8-2a255067b69efanlore.org/092b9a99-b353-476c-93f8... blob:https://fanlore.org/092b9a99-b353-476c-93f8-2a255067b69e — 200 — -1 B — 63 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/av0/rch/l81bm/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/av0/rch/l81bm/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 98.3 KiB — 36 ms — h3blob:https://challenges.cloudflare.com/ad077931-9811-47ee-a735-a1368442ce26challenges.cloudflare.com/ad077931-... blob:https://challenges.cloudflare.com/ad077931-9811-47ee-a735-a1368442ce26 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/fo/2941238673:1784873726:hAGqk0n9_Sjzyg2wTNPNQLgjN-mV2_Te1KpatxaZQjQ/a2013c460a08edd5/8YY0FzdkYtIzx03ALFQyVs4q5X9ZyxybE9GrHTNvaLo-1784878393-1.2.1.1-4kz75nXarKQxBmGK61_KkZU.3_twbeqNXGHs0PoUSUymRLl5oV84rGdW0ZUzZN97challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/fo/2941238673:1784873726:hAGqk0n9_Sjzyg2wTNPNQLgjN-mV2_Te1KpatxaZQjQ/a2013c460a08edd5/8YY0FzdkYtIzx03ALFQyVs4q5X9ZyxybE9GrHTNvaLo-1784878393-1.2.1.1-4kz75nXarKQxBmGK61_KkZU.3_twbeqNXGHs0PoUSUymRLl5oV84rGdW0ZUzZN97 — 200 — 321.7 KiB — 140 ms — h3blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962bchallenges.cloudflare.com/b78528c8-... blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962b — 200 — -1 B — 144 ms — blobhttps://hagen.challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/i/a2013c460a08edd5/8YY0FzdkYtIzx03ALFQyVs4q5X9ZyxybE9GrHTNvaLo-1784878393-1.2.1.1-4kz75nXarKQxBmGK61_KkZU.3_twbeqNXGHs0PoUSUymRLl5oV84rGdW0ZUzZN97hagen.challenges.cloudflare.com/cdn... https://hagen.challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/i/a2013c460a08edd5/8YY0FzdkYtIzx03ALFQyVs4q5X9ZyxybE9GrHTNvaLo-1784878393-1.2.1.1-4kz75nXarKQxBmGK61_KkZU.3_twbeqNXGHs0PoUSUymRLl5oV84rGdW0ZUzZN97 — 204 — 540 B — 43 ms — h2https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/a2013c460a08edd5/1784878393750/b791e4b0d6c01099d6e4fb1e2cbec8a2da86245645210dcc9b0f4bf49bd19fed/GmlyUcMWaDzgTkmchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/a2013c460a08edd5/1784878393750/b791e4b0d6c01099d6e4fb1e2cbec8a2da86245645210dcc9b0f4bf49bd19fed/GmlyUcMWaDzgTkm — 401 — 1.7 KiB — 13 ms — h3blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962bchallenges.cloudflare.com/b78528c8-... blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962b — 200 — -1 B — 69 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/ci/a2013c460a08edd5/1784878393750/LtZHFmow9CIqtGOchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/ci/a2013c460a08edd5/1784878393750/LtZHFmow9CIqtGO — 200 — 6.1 KiB — 7 ms — h3blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962bchallenges.cloudflare.com/b78528c8-... blob:https://challenges.cloudflare.com/b78528c8-a7ea-49e2-a72f-68247f99962b — 200 — -1 B — 19 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/fo/2941238673:1784873726:hAGqk0n9_Sjzyg2wTNPNQLgjN-mV2_Te1KpatxaZQjQ/a2013c460a08edd5/8YY0FzdkYtIzx03ALFQyVs4q5X9ZyxybE9GrHTNvaLo-1784878393-1.2.1.1-4kz75nXarKQxBmGK61_KkZU.3_twbeqNXGHs0PoUSUymRLl5oV84rGdW0ZUzZN97challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/fo/2941238673:1784873726:hAGqk0n9_Sjzyg2wTNPNQLgjN-mV2_Te1KpatxaZQjQ/a2013c460a08edd5/8YY0FzdkYtIzx03ALFQyVs4q5X9ZyxybE9GrHTNvaLo-1784878393-1.2.1.1-4kz75nXarKQxBmGK61_KkZU.3_twbeqNXGHs0PoUSUymRLl5oV84rGdW0ZUzZN97 — 200 — 38.5 KiB — 33 ms — h3blob:https://challenges.cloudflare.com/d38fa9e2-1e89-4b64-ab56-4037708fac47challenges.cloudflare.com/d38fa9e2-... blob:https://challenges.cloudflare.com/d38fa9e2-1e89-4b64-ab56-4037708fac47 — 200 — -1 B — 31 ms — blob
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
1% of JavaScript execution is third-party
First-party Third-party 255ms · 24KB · $3/mo
challenges.cloudflare.com
Other
Costly
Execution 255ms
Transfer 24 KB
Monthly Cost $3/mo

These scripts may cost more than they're worth

  • challenges.cloudflare.com adds 255ms and costs ~$3/month

challenges.cloudflare.com takes 255ms 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 (2026-06-25 — 2026-07-22)

LCP (p75)

1310 ms

95% good

INP (p75)

262 ms

59% good

CLS (p75)

0.040

94% good

FCP (p75)

1235 ms

TTFB (p75)

833 ms

Image Optimization
1 images, 6 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

6 KB

1 missing dimensions 1 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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