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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
3
PASS
12
INFO
2

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

Mobile Desktop
87
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.

1.53 s

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

3.75 s

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

92 ms

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

0.001

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

3.46 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.

4.31 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
17
12 PASS 3 REVIEW
B
Image Optimization
15 images, 0 KB saveable
REVIEW
15 images, 0 KB saveable
Info::
All images are well-optimized
15 images 120 KB
0 oversized -0 KB
12 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1310ms total JS execution
REVIEW
1310ms total JS execution
Warning::
Unattributable: 449ms CPU time
Warning::
https://archive.org/offshoot_assets/index-j6hWQWNI...: 324ms CPU time
Info::
https://archive.org/offshoot_assets/sentry-AjyKTUQ...: 244ms CPU time
Info::
https://archive.org/: 243ms CPU time
Info::
https://archive.org/offshoot_assets/index-Boc4ICmW...: 50ms CPU time
Info::
Third-party scripts: 449ms (34% of total)

Main Thread Breakdown

Script Evaluation 45% Other 32% Style & Layout 12% Rendering 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable449ms205ms0ms3rd
https://archive.org/offshoot_assets/index-j6hWQWNI.js324ms225ms1ms1st
https://archive.org/offshoot_assets/sentry-AjyKTUQ5.js244ms125ms0ms1st
https://archive.org/243ms4ms1ms1st
https://archive.org/offshoot_assets/index-Boc4ICmW.js50ms40ms0ms1st
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
422 KB transferred, 91 requests
PASS
422 KB transferred, 91 requests
Info::
Page weighs 754 KB (422 KB transferred)
Info::
91 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
422 KB / 2.4 MB budget
422 KB transferred
91 requests
0.09 g CO2 per page load
JavaScript 278.2 KiB 66%
Images 120.3 KiB 29%
Other 12.8 KiB 3%
Other 5.5 KiB 1%
HTML 2.7 KiB 1%
CSS 2.2 KiB 1%
Other 243 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
0% third-party, 0 ms blocking
PASS
0% third-party, 0 ms blocking
Info::
Third-party code accounts for 0% of page weight (750 B of 422.0 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
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
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
49 scripts, 0 KB unused
PASS
49 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://archive.org/offshoot_assets/vendor/lit/polyfill-support.js3 KB—✓1st
https://archive.org/offshoot_assets/vendor/@webcomponents/webcomponentsjs@2.6.0/webcomponents-loader.js4 KB—✓1st
https://archive.org/offshoot_assets/index-j6hWQWNI.js70 KB—✓1st
https://apollo.archive.org/js/container_ZUUaFed2.js0 KB—✓3rd
https://archive.org/offshoot_assets/psa-banners-C3jbCo50.js3 KB—✓1st
https://archive.org/offshoot_assets/unsafe-html-G0Mu11OI.js2 KB—✓1st
https://archive.org/offshoot_assets/alert-banner-DBpSCuAb.js3 KB—✓1st
https://archive.org/offshoot_assets/index-CH1gycJE.js10 KB—✓1st
https://archive.org/offshoot_assets/icon-close-BOLRcH9m.js2 KB—✓1st
https://archive.org/offshoot_assets/app-services-IVqL_J5Q.js4 KB—✓1st
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 resource hints configured

A+
Page Weight Inventory
91 resources · 422 KB · 0 KB savings available
PASS
91 resources · 422 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 422 KB
Info::
20 third-party resources (0% of weight)
91 resources · 422.0 KiB · 20 third-party Within 1MB page-weight target
JavaScript 66% · 278.2 KiB
Image 30% · 126.1 KiB
Other 3% · 12.8 KiB
Document 1% · 2.7 KiB
CSS 1% · 2.2 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+
HTTP Caching
max-age=900 (15 minutes)
PASS
max-age=900 (15 minutes)
Info::
Cache-Control header is set
Got: max-age=900
Info::
Effective TTL: 15 minutes (max-age=900)
Info::
Last-Modified header present
Cache-Control

max-age=900

DirectiveValueMeaning
max-age900Cache for 15 minutes
Effective TTL: 900 seconds
Network Waterfall
91 requests over 2684ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.5 s LCP 3.8 shttps://archive.org// https://archive.org/ — 200 — 2.7 KiB — 457 ms — h2https://archive.org/offshoot_assets/index.css/offshoot_assets/index.css https://archive.org/offshoot_assets/index.css — 200 — 2.2 KiB — 173 ms — h2https://archive.org/offshoot_assets/vendor/lit/polyfill-support.js/offshoot_assets/vendor/lit/polyfil... https://archive.org/offshoot_assets/vendor/lit/polyfill-support.js — 200 — 2.8 KiB — 173 ms — h2https://archive.org/offshoot_assets/vendor/@webcomponents/webcomponentsjs@2.6.0/webcomponents-loader.js/offshoot_assets/vendor/@webcompone... https://archive.org/offshoot_assets/vendor/@webcomponents/webcomponentsjs@2.6.0/webcomponents-loader.js — 200 — 3.7 KiB — 173 ms — h2https://archive.org/offshoot_assets/index-j6hWQWNI.js/offshoot_assets/index-j6hWQWNI.js https://archive.org/offshoot_assets/index-j6hWQWNI.js — 200 — 69.7 KiB — 459 ms — h2https://apollo.archive.org/js/container_ZUUaFed2.jsapollo.archive.org/js/container_ZUU... https://apollo.archive.org/js/container_ZUUaFed2.js — 204 — 128 B — 327 ms — h2https://archive.org/offshoot_assets/psa-banners-C3jbCo50.js/offshoot_assets/psa-banners-C3jbCo... https://archive.org/offshoot_assets/psa-banners-C3jbCo50.js — 200 — 2.5 KiB — 181 ms — h2https://archive.org/offshoot_assets/unsafe-html-G0Mu11OI.js/offshoot_assets/unsafe-html-G0Mu11... https://archive.org/offshoot_assets/unsafe-html-G0Mu11OI.js — 200 — 1.8 KiB — 181 ms — h2https://archive.org/offshoot_assets/alert-banner-DBpSCuAb.js/offshoot_assets/alert-banner-DBpSC... https://archive.org/offshoot_assets/alert-banner-DBpSCuAb.js — 200 — 2.6 KiB — 181 ms — h2https://archive.org/offshoot_assets/index-CH1gycJE.js/offshoot_assets/index-CH1gycJE.js https://archive.org/offshoot_assets/index-CH1gycJE.js — 200 — 9.6 KiB — 179 ms — h2https://archive.org/offshoot_assets/icon-close-BOLRcH9m.js/offshoot_assets/icon-close-BOLRcH9... https://archive.org/offshoot_assets/icon-close-BOLRcH9m.js — 200 — 1.9 KiB — 179 ms — h2https://archive.org/offshoot_assets/app-services-IVqL_J5Q.js/offshoot_assets/app-services-IVqL_... https://archive.org/offshoot_assets/app-services-IVqL_J5Q.js — 200 — 4.3 KiB — 174 ms — h2https://archive.org/offshoot_assets/sentry-AjyKTUQ5.js/offshoot_assets/sentry-AjyKTUQ5.js https://archive.org/offshoot_assets/sentry-AjyKTUQ5.js — 200 — 38.4 KiB — 178 ms — h2https://archive.org/offshoot_assets/exports-8TZx4202.js/offshoot_assets/exports-8TZx4202.j... https://archive.org/offshoot_assets/exports-8TZx4202.js — 200 — 14.8 KiB — 287 ms — h2https://archive.org/offshoot_assets/index-D3NNTP1P.js/offshoot_assets/index-D3NNTP1P.js https://archive.org/offshoot_assets/index-D3NNTP1P.js — 200 — 2.9 KiB — 199 ms — h2https://archive.org/offshoot_assets/key-value-store-manager-Mi0FNXSY.js/offshoot_assets/key-value-store-ma... https://archive.org/offshoot_assets/key-value-store-manager-Mi0FNXSY.js — 200 — 1.9 KiB — 199 ms — h2https://archive.org/offshoot_assets/index-Boc4ICmW.js/offshoot_assets/index-Boc4ICmW.js https://archive.org/offshoot_assets/index-Boc4ICmW.js — 200 — 1.8 KiB — 199 ms — h2https://archive.org/offshoot_assets/psa-banner-service-Bwoqluw9.js/offshoot_assets/psa-banner-service... https://archive.org/offshoot_assets/psa-banner-service-Bwoqluw9.js — 200 — 1.8 KiB — 199 ms — h2https://archive.org/offshoot_assets/localization-manager-BNVmDrZM.js/offshoot_assets/localization-manag... https://archive.org/offshoot_assets/localization-manager-BNVmDrZM.js — 200 — 2.0 KiB — 199 ms — h2https://archive.org/offshoot_assets/index-BxCKNB1V.js/offshoot_assets/index-BxCKNB1V.js https://archive.org/offshoot_assets/index-BxCKNB1V.js — 200 — 1.5 KiB — 199 ms — h2https://archive.org/offshoot_assets/config-service-Cdv7C7Hs.js/offshoot_assets/config-service-Cdv... https://archive.org/offshoot_assets/config-service-Cdv7C7Hs.js — 200 — 1.6 KiB — 198 ms — h2https://archive.org/offshoot_assets/theme-manager-BL05_SYf.js/offshoot_assets/theme-manager-BL05... https://archive.org/offshoot_assets/theme-manager-BL05_SYf.js — 200 — 2.4 KiB — 197 ms — h2https://archive.org/offshoot_assets/theme-option-BPtoJbAF.js/offshoot_assets/theme-option-BPtoJ... https://archive.org/offshoot_assets/theme-option-BPtoJbAF.js — 200 — 1.4 KiB — 197 ms — h2https://archive.org/offshoot_assets/index-Cb0lFAYT.js/offshoot_assets/index-Cb0lFAYT.js https://archive.org/offshoot_assets/index-Cb0lFAYT.js — 200 — 2.5 KiB — 197 ms — h2https://archive.org/offshoot_assets/string-Bnnka0r4.js/offshoot_assets/string-Bnnka0r4.js https://archive.org/offshoot_assets/string-Bnnka0r4.js — 200 — 2.0 KiB — 197 ms — h2https://archive.org/offshoot_assets/index-B4ldL3oW.js/offshoot_assets/index-B4ldL3oW.js https://archive.org/offshoot_assets/index-B4ldL3oW.js — 200 — 1.7 KiB — 197 ms — h2https://sink.archive.org/api/2/envelope/?sentry_version=7&sentry_key=f36cc7e0e3484c2ab9aa70f5999ee9ca&sentry_client=sentry.javascript.browser%2F9.46.0sink.archive.org/api/2/envelope/?se... https://sink.archive.org/api/2/envelope/?sentry_version=7&sentry_key=f36cc7e0e3484c2ab9aa70f5999ee9ca&sentry_client=sentry.javascript.browser%2F9.46.0 — 200 — 379 B — 642 ms — h2https://archive.org/offshoot_assets/favicon.ico/offshoot_assets/favicon.ico https://archive.org/offshoot_assets/favicon.ico — 200 — 5.5 KiB — 153 ms — h2https://archive.org/services/donations/banner.php/services/donations/banner.php https://archive.org/services/donations/banner.php — 200 — 1.7 KiB — 209 ms — h2https://archive.org/offshoot_assets/index-DBgiameD.js/offshoot_assets/index-DBgiameD.js https://archive.org/offshoot_assets/index-DBgiameD.js — 200 — 2.5 KiB — 210 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.5 s LCP 3.8 shttps://archive.org// https://archive.org/ — 200 — 2.7 KiB — 457 ms — h2https://archive.org/offshoot_assets/index.css/offshoot_assets/index.css https://archive.org/offshoot_assets/index.css — 200 — 2.2 KiB — 173 ms — h2https://archive.org/offshoot_assets/vendor/lit/polyfill-support.js/offshoot_assets/vendor/lit/polyfil... https://archive.org/offshoot_assets/vendor/lit/polyfill-support.js — 200 — 2.8 KiB — 173 ms — h2https://archive.org/offshoot_assets/vendor/@webcomponents/webcomponentsjs@2.6.0/webcomponents-loader.js/offshoot_assets/vendor/@webcompone... https://archive.org/offshoot_assets/vendor/@webcomponents/webcomponentsjs@2.6.0/webcomponents-loader.js — 200 — 3.7 KiB — 173 ms — h2https://archive.org/offshoot_assets/index-j6hWQWNI.js/offshoot_assets/index-j6hWQWNI.js https://archive.org/offshoot_assets/index-j6hWQWNI.js — 200 — 69.7 KiB — 459 ms — h2https://apollo.archive.org/js/container_ZUUaFed2.jsapollo.archive.org/js/container_ZUU... https://apollo.archive.org/js/container_ZUUaFed2.js — 204 — 128 B — 327 ms — h2https://archive.org/offshoot_assets/psa-banners-C3jbCo50.js/offshoot_assets/psa-banners-C3jbCo... https://archive.org/offshoot_assets/psa-banners-C3jbCo50.js — 200 — 2.5 KiB — 181 ms — h2https://archive.org/offshoot_assets/unsafe-html-G0Mu11OI.js/offshoot_assets/unsafe-html-G0Mu11... https://archive.org/offshoot_assets/unsafe-html-G0Mu11OI.js — 200 — 1.8 KiB — 181 ms — h2https://archive.org/offshoot_assets/alert-banner-DBpSCuAb.js/offshoot_assets/alert-banner-DBpSC... https://archive.org/offshoot_assets/alert-banner-DBpSCuAb.js — 200 — 2.6 KiB — 181 ms — h2https://archive.org/offshoot_assets/index-CH1gycJE.js/offshoot_assets/index-CH1gycJE.js https://archive.org/offshoot_assets/index-CH1gycJE.js — 200 — 9.6 KiB — 179 ms — h2https://archive.org/offshoot_assets/icon-close-BOLRcH9m.js/offshoot_assets/icon-close-BOLRcH9... https://archive.org/offshoot_assets/icon-close-BOLRcH9m.js — 200 — 1.9 KiB — 179 ms — h2https://archive.org/offshoot_assets/app-services-IVqL_J5Q.js/offshoot_assets/app-services-IVqL_... https://archive.org/offshoot_assets/app-services-IVqL_J5Q.js — 200 — 4.3 KiB — 174 ms — h2https://archive.org/offshoot_assets/sentry-AjyKTUQ5.js/offshoot_assets/sentry-AjyKTUQ5.js https://archive.org/offshoot_assets/sentry-AjyKTUQ5.js — 200 — 38.4 KiB — 178 ms — h2https://archive.org/offshoot_assets/exports-8TZx4202.js/offshoot_assets/exports-8TZx4202.j... https://archive.org/offshoot_assets/exports-8TZx4202.js — 200 — 14.8 KiB — 287 ms — h2https://archive.org/offshoot_assets/index-D3NNTP1P.js/offshoot_assets/index-D3NNTP1P.js https://archive.org/offshoot_assets/index-D3NNTP1P.js — 200 — 2.9 KiB — 199 ms — h2https://archive.org/offshoot_assets/key-value-store-manager-Mi0FNXSY.js/offshoot_assets/key-value-store-ma... https://archive.org/offshoot_assets/key-value-store-manager-Mi0FNXSY.js — 200 — 1.9 KiB — 199 ms — h2https://archive.org/offshoot_assets/index-Boc4ICmW.js/offshoot_assets/index-Boc4ICmW.js https://archive.org/offshoot_assets/index-Boc4ICmW.js — 200 — 1.8 KiB — 199 ms — h2https://archive.org/offshoot_assets/psa-banner-service-Bwoqluw9.js/offshoot_assets/psa-banner-service... https://archive.org/offshoot_assets/psa-banner-service-Bwoqluw9.js — 200 — 1.8 KiB — 199 ms — h2https://archive.org/offshoot_assets/localization-manager-BNVmDrZM.js/offshoot_assets/localization-manag... https://archive.org/offshoot_assets/localization-manager-BNVmDrZM.js — 200 — 2.0 KiB — 199 ms — h2https://archive.org/offshoot_assets/index-BxCKNB1V.js/offshoot_assets/index-BxCKNB1V.js https://archive.org/offshoot_assets/index-BxCKNB1V.js — 200 — 1.5 KiB — 199 ms — h2https://archive.org/offshoot_assets/config-service-Cdv7C7Hs.js/offshoot_assets/config-service-Cdv... https://archive.org/offshoot_assets/config-service-Cdv7C7Hs.js — 200 — 1.6 KiB — 198 ms — h2https://archive.org/offshoot_assets/theme-manager-BL05_SYf.js/offshoot_assets/theme-manager-BL05... https://archive.org/offshoot_assets/theme-manager-BL05_SYf.js — 200 — 2.4 KiB — 197 ms — h2https://archive.org/offshoot_assets/theme-option-BPtoJbAF.js/offshoot_assets/theme-option-BPtoJ... https://archive.org/offshoot_assets/theme-option-BPtoJbAF.js — 200 — 1.4 KiB — 197 ms — h2https://archive.org/offshoot_assets/index-Cb0lFAYT.js/offshoot_assets/index-Cb0lFAYT.js https://archive.org/offshoot_assets/index-Cb0lFAYT.js — 200 — 2.5 KiB — 197 ms — h2https://archive.org/offshoot_assets/string-Bnnka0r4.js/offshoot_assets/string-Bnnka0r4.js https://archive.org/offshoot_assets/string-Bnnka0r4.js — 200 — 2.0 KiB — 197 ms — h2https://archive.org/offshoot_assets/index-B4ldL3oW.js/offshoot_assets/index-B4ldL3oW.js https://archive.org/offshoot_assets/index-B4ldL3oW.js — 200 — 1.7 KiB — 197 ms — h2https://sink.archive.org/api/2/envelope/?sentry_version=7&sentry_key=f36cc7e0e3484c2ab9aa70f5999ee9ca&sentry_client=sentry.javascript.browser%2F9.46.0sink.archive.org/api/2/envelope/?se... https://sink.archive.org/api/2/envelope/?sentry_version=7&sentry_key=f36cc7e0e3484c2ab9aa70f5999ee9ca&sentry_client=sentry.javascript.browser%2F9.46.0 — 200 — 379 B — 642 ms — h2https://archive.org/offshoot_assets/favicon.ico/offshoot_assets/favicon.ico https://archive.org/offshoot_assets/favicon.ico — 200 — 5.5 KiB — 153 ms — h2https://archive.org/services/donations/banner.php/services/donations/banner.php https://archive.org/services/donations/banner.php — 200 — 1.7 KiB — 209 ms — h2https://archive.org/offshoot_assets/index-DBgiameD.js/offshoot_assets/index-DBgiameD.js https://archive.org/offshoot_assets/index-DBgiameD.js — 200 — 2.5 KiB — 210 ms — h2https://archive.org/offshoot_assets/review-Re2iy7ma.js/offshoot_assets/review-Re2iy7ma.js https://archive.org/offshoot_assets/review-Re2iy7ma.js — 200 — 4.4 KiB — 210 ms — h2https://archive.org/services/offshoot/config.php?key=feature.zendesk_enabled/services/offshoot/config.php?key=f... https://archive.org/services/offshoot/config.php?key=feature.zendesk_enabled — 200 — 1.4 KiB — 225 ms — h2https://archive.org/offshoot_assets/index-sdPy9THC.js/offshoot_assets/index-sdPy9THC.js https://archive.org/offshoot_assets/index-sdPy9THC.js — 200 — 2.0 KiB — 204 ms — h2https://archive.org/offshoot_assets/app-footer-D_qhFNwS.js/offshoot_assets/app-footer-D_qhFNw... https://archive.org/offshoot_assets/app-footer-D_qhFNwS.js — 200 — 1.9 KiB — 199 ms — h2https://archive.org/offshoot_assets/lightdom-tunnel-ClJ3oxlo.js/offshoot_assets/lightdom-tunnel-Cl... https://archive.org/offshoot_assets/lightdom-tunnel-ClJ3oxlo.js — 200 — 1.8 KiB — 197 ms — h2https://archive.org/offshoot_assets/abtest-manager-BAlYYYju.js/offshoot_assets/abtest-manager-BAl... https://archive.org/offshoot_assets/abtest-manager-BAlYYYju.js — 200 — 1.9 KiB — 214 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
34% of JavaScript execution is third-party
First-party Third-party 449ms · 0KB · $6/mo
Unattributable
Other
Costly
Execution 449ms
Transfer 0 KB
Monthly Cost $6/mo

These scripts may cost more than they're worth

  • Unattributable adds 449ms and costs ~$6/month

Unattributable takes 449ms 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

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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