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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
90
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.

914 ms

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

1.67 s

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

0 ms

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

0.002

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

1.72 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.

1.67 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
15
11 PASS 2 REVIEW
B
Image Optimization
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Info::
All images are well-optimized
19 images 158 KB
0 oversized -0 KB
16 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
460 KB transferred, 95 requests
PASS
460 KB transferred, 95 requests
Info::
Page weighs 786 KB (460 KB transferred)
Info::
95 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
460 KB / 2.4 MB budget
460 KB transferred
95 requests
0.09 g CO2 per page load
JavaScript 278.2 KiB 61%
Images 157.9 KiB 34%
Other 12.8 KiB 3%
Other 5.5 KiB 1%
HTML 2.7 KiB 1%
CSS 2.2 KiB 0%
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 459.5 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+
JS Execution Cost
350ms total JS execution
PASS
350ms total JS execution
Info::
Unattributable: 118ms CPU time
Info::
https://archive.org/: 86ms CPU time
Info::
https://archive.org/offshoot_assets/index-j6hWQWNI...: 77ms CPU time
Info::
https://archive.org/offshoot_assets/sentry-AjyKTUQ...: 70ms CPU time
Info::
Third-party scripts: 118ms (34% of total)

Main Thread Breakdown

Script Evaluation 41% Other 34% Style & Layout 14% Rendering 8% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable118ms46ms0ms3rd
https://archive.org/86ms1ms0ms1st
https://archive.org/offshoot_assets/index-j6hWQWNI.js77ms50ms0ms1st
https://archive.org/offshoot_assets/sentry-AjyKTUQ5.js70ms34ms0ms1st
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Page Weight Inventory
95 resources · 460 KB · 0 KB savings available
PASS
95 resources · 460 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 460 KB
Info::
20 third-party resources (0% of weight)
95 resources · 459.5 KiB · 20 third-party Within 1MB page-weight target
JavaScript 61% · 278.2 KiB
Image 36% · 163.6 KiB
Other 3% · 12.8 KiB
Document 1% · 2.7 KiB
CSS 0% · 2.2 KiB
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
95 requests over 3467ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 914 ms LCP 1.7 shttps://archive.org// https://archive.org/ — 200 — 2.7 KiB — 464 ms — h2https://archive.org/offshoot_assets/index.css/offshoot_assets/index.css https://archive.org/offshoot_assets/index.css — 200 — 2.2 KiB — 170 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 — 168 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 — 168 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 — 455 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 — 188 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 — 186 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 — 185 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 — 185 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 — 183 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 — 183 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 — 178 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 — 183 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 — 291 ms — h2https://archive.org/offshoot_assets/favicon.ico/offshoot_assets/favicon.ico https://archive.org/offshoot_assets/favicon.ico — 200 — 5.5 KiB — 251 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 — 245 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 — 244 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 469 ms — h2https://archive.org/services/donations/banner.php/services/donations/banner.php https://archive.org/services/donations/banner.php — 200 — 1.7 KiB — 240 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 — 257 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 914 ms LCP 1.7 shttps://archive.org// https://archive.org/ — 200 — 2.7 KiB — 464 ms — h2https://archive.org/offshoot_assets/index.css/offshoot_assets/index.css https://archive.org/offshoot_assets/index.css — 200 — 2.2 KiB — 170 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 — 168 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 — 168 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 — 455 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 — 188 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 — 186 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 — 185 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 — 185 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 — 183 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 — 183 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 — 178 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 — 183 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 — 291 ms — h2https://archive.org/offshoot_assets/favicon.ico/offshoot_assets/favicon.ico https://archive.org/offshoot_assets/favicon.ico — 200 — 5.5 KiB — 251 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 — 245 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 — 244 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 243 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 — 469 ms — h2https://archive.org/services/donations/banner.php/services/donations/banner.php https://archive.org/services/donations/banner.php — 200 — 1.7 KiB — 240 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 — 257 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 — 257 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 — 264 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 — 250 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 — 243 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 — 240 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 — 240 ms — h2https://archive.org/offshoot_assets/media-count-service-C3Xuv6Ks.js/offshoot_assets/media-count-servic... https://archive.org/offshoot_assets/media-count-service-C3Xuv6Ks.js — 200 — 1.6 KiB — 240 ms — h2https://archive.org/offshoot_assets/page-metadata-service-Dy6JXWZk.js/offshoot_assets/page-metadata-serv... https://archive.org/offshoot_assets/page-metadata-service-Dy6JXWZk.js — 200 — 1.9 KiB — 240 ms — h2https://archive.org/offshoot_assets/home-page-DX3KTE0e.js/offshoot_assets/home-page-DX3KTE0e... https://archive.org/offshoot_assets/home-page-DX3KTE0e.js — 200 — 18.5 KiB — 240 ms — h2https://archive.org/offshoot_assets/ia-survey-extra-DSRLkba7.js/offshoot_assets/ia-survey-extra-DS... https://archive.org/offshoot_assets/ia-survey-extra-DSRLkba7.js — 200 — 12.9 KiB — 240 ms — h2https://archive.org/offshoot_assets/ia-status-indicator-Do5FGThq.js/offshoot_assets/ia-status-indicato... https://archive.org/offshoot_assets/ia-status-indicator-Do5FGThq.js — 200 — 11.5 KiB — 239 ms — h2https://archive.org/offshoot_assets/schema-org-json-ld-service-C0imuF9q.js/offshoot_assets/schema-org-json-ld... 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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 118ms · 0KB · $2/mo
Unattributable
Other
Optional
Execution 118ms
Transfer 0 KB
Monthly Cost $2/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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