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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
0
REVIEW
6
PASS
9
INFO
2

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

Mobile Desktop
58
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

5.34 s

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

7.94 s

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

151 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.

6.53 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.

8.05 s

Page Load Progression

581 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
17
9 PASS 6 REVIEW
B
Page Weight Budget
1.1 MB transferred, 101 requests
REVIEW
1.1 MB transferred, 101 requests
Info::
Page weighs 3.3 MB (1.1 MB transferred)
Info::
CSS is 289 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 289 KB
Warning::
101 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.24 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
101 requests
0.24 g CO2 per page load
Images 381.0 KiB 33%
JavaScript 378.6 KiB 33%
CSS 289.3 KiB 25%
Fonts 70.6 KiB 6%
HTML 36.5 KiB 3%
Other 1.9 KiB 0%
Other 1.2 KiB 0%
Other 745 B 0%
0 2.4 MB 4.9 MB
Under budget

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

B
Third-Party Impact
40% third-party, 0 ms blocking
REVIEW
40% third-party, 0 ms blocking
Info::
Third-party code accounts for 40% of page weight (466.4 KiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
60%
40%
First-party Third-party
C
Image Optimization
Action
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
Warning::
https://i0.wp.com/opensource.org/wp-content/upload... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i0.wp.com/opensource.org/wp-content/upload... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i0.wp.com/opensource.org/wp-content/upload... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i0.wp.com/opensource.org/wp-content/upload... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i0.wp.com/opensource.org/wp-content/upload... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
23 images 381 KB
0 oversized -0 KB
13 legacy format
5 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1802ms total JS execution
REVIEW
1802ms total JS execution
Warning::
Unattributable: 459ms CPU time
Warning::
https://opensource.org/: 423ms CPU time
Warning::
https://opensource.org/cdn-cgi/challenge-platform/...: 289ms CPU time
Warning::
https://opensource.org/wp-content/plugins/coblocks...: 280ms CPU time
Info::
https://opensource.org/wp-content/plugins/jetpack/...: 104ms CPU time
Info::
Third-party scripts: 531ms (29% of total)

Main Thread Breakdown

Script Evaluation 30% Other 29% Style & Layout 25% Parse HTML & CSS 8% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
Unattributable459ms14ms0ms3rd
https://opensource.org/423ms38ms10ms1st
https://opensource.org/cdn-cgi/challenge-platform/scripts/jsd/main.js289ms195ms2ms1st
https://opensource.org/wp-content/plugins/coblocks/dist/js/coblocks-tinyswiper-initializer.js?ver=3.1.17280ms32ms1ms1st
https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.defaultVendors.js?minify=false&ver=12bb4b11004800566abc104ms96ms7ms1st
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.js72ms56ms7ms3rd
https://opensource.org/wp-content/themes/osi/assets/js/build/theme.js?ver=172479807371ms29ms1ms1st
https://opensource.org/wp-content/plugins/events-manager/includes/js/events-manager.js?ver=7.2.3.154ms17ms37ms1st
https://opensource.org/wp-content/uploads/136772de92/pa-u3bOjrGiXDsYr3K8pYyfj.js50ms20ms1ms1st
B
JS Bundles
39 scripts, 107 KB unused
REVIEW
39 scripts, 107 KB unused
Warning::
https://opensource.org/wp-content/plugins/events-m...: 107 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://opensource.org/wp-content/plugins/events-m...: unminified — 14 KB could be saved
Info::
Total unused JavaScript: 107 KB
107 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://opensource.org/wp-content/plugins/events-manager/includes/js/events-manager.js?ver=7.2.3.1118 KB107 KB (91%)✗1st
https://opensource.org/wp-content/plugins/gutenberg/build/scripts/hooks/index.min.js?ver=7496969728ca0f95732d2 KB—✓1st
https://opensource.org/wp-content/plugins/contact-form-7/includes/swv/js/index.js?ver=6.1.54 KB—✓1st
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/mouse.min.js1 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/sortable.min.js7 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/datepicker.min.js11 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/resizable.min.js6 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/draggable.min.js5 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/controlgroup.min.js2 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/checkboxradio.min.js2 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
101 resources · 1.1 MB · 107 KB savings available
REVIEW
101 resources · 1.1 MB · 107 KB savings available
Warning::
Page weight 136 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~107 KB of savings available
Warning::
35 third-party resources (40% of weight)
101 resources · 1.1 MiB · 35 third-party 135.9 KiB over 1MB target
Image 33% · 382.2 KiB
JavaScript 33% · 378.6 KiB
CSS 25% · 289.3 KiB
Font 6% · 70.6 KiB
Document 3% · 36.5 KiB
Other 0% · 2.6 KiB

~107.1 KiB of savings available

Remove unused JavaScript: 107.1 KiB
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
3 fonts (71 KB)
PASS
3 fonts (71 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

71 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 5.3 s LCP 7.9 sdata:font/woff;base64,d09GRgABAAAAADakAA0AAAAAVqwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABGRlRNAAA2iAAAABoAA…woff;base64,d09GRgABAAA... data:font/woff;base64,d09GRgABAAAAADakAA0AAAAAVqwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABGRlRNAAA2iAAAABoAA… — 13.7 KiB — 44 ms — font-display: swaphttps://opensource.org/wp-content/themes/osi/assets/fonts/libre-franklin/libre-franklin-100-900.woff2libre-franklin-100-900.... https://opensource.org/wp-content/themes/osi/assets/fonts/libre-franklin/libre-franklin-100-900.woff2 — 26.9 KiB — 28 ms — font-display: swaphttps://opensource.org/wp-content/themes/osi/assets/fonts/libre-franklin/libre-franklin-100-900-italic.woff2libre-franklin-100-900-... https://opensource.org/wp-content/themes/osi/assets/fonts/libre-franklin/libre-franklin-100-900-italic.woff2 — 30.0 KiB — 34 ms — font-display: swap
woff;base64,d09GRgABAAA... woff swap
Size 14 KB
Load time 44 ms
Start 387 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
libre-franklin-100-900.... woff2 swap
Size 27 KB
Load time 28 ms
Start 429 ms
Risk FOUT — text flashes from fallback to web font
libre-franklin-100-900-... woff2 swap
Size 30 KB
Load time 34 ms
Start 429 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~4 KB and ~8 ms

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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
2
preload
—
dns-prefetch
2
prefetch
—

4 resource hints configured

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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A+
HTTP Caching
max-age=240 (4 minutes)
PASS
max-age=240 (4 minutes)
Info::
Cache-Control header is set
Got: max-age=240, must-revalidate
Info::
Effective TTL: 4 minutes (max-age=240)
Info::
Last-Modified header present
Cache-Control

max-age=240, must-revalidate

DirectiveValueMeaning
max-age240Cache for 4 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 240 seconds
Network Waterfall
101 requests over 4508ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 5.3 s LCP 7.9 shttps://opensource.org// https://opensource.org/ — 200 — 36.5 KiB — 85 ms — h2https://opensource.org/wp-content/plugins/gutenberg/build/styles/block-library/style.min.css?ver=22.9.0/wp-content/plugins/gutenberg/build... https://opensource.org/wp-content/plugins/gutenberg/build/styles/block-library/style.min.css?ver=22.9.0 — 200 — 18.3 KiB — 48 ms — h2https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-forms/dist/contact-form/css/jetpack-forms-layout.css?ver=15.8-a.5/wp-content/plugins/jetpack/jetpack... https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-forms/dist/contact-form/css/jetpack-forms-layout.css?ver=15.8-a.5 — 200 — 1.2 KiB — 42 ms — h2https://opensource.org/wp-content/plugins/timeline-block/includes/cool-timeline-block/dist/style-index.css/wp-content/plugins/timeline-block/... https://opensource.org/wp-content/plugins/timeline-block/includes/cool-timeline-block/dist/style-index.css — 200 — 4.0 KiB — 66 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/mediaelement/mediaelementplayer-legacy.min.cssc0.wp.com/c/6.9.4/wp-includes/js/me... https://c0.wp.com/c/6.9.4/wp-includes/js/mediaelement/mediaelementplayer-legacy.min.css — 200 — 2.9 KiB — 26 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/mediaelement/wp-mediaelement.min.cssc0.wp.com/c/6.9.4/wp-includes/js/me... https://c0.wp.com/c/6.9.4/wp-includes/js/mediaelement/wp-mediaelement.min.css — 200 — 1.4 KiB — 29 ms — h2https://opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-1.css?ver=3.1.17/wp-content/plugins/coblocks/dist/s... https://opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-1.css?ver=3.1.17 — 200 — 31.9 KiB — 70 ms — h2https://opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-extensions.css?ver=3.1.17/wp-content/plugins/coblocks/dist/s... https://opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-extensions.css?ver=3.1.17 — 200 — 3.4 KiB — 61 ms — h2https://opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-animation.css?ver=2677611078ee87eb3b1c/wp-content/plugins/coblocks/dist/s... https://opensource.org/wp-content/plugins/coblocks/dist/style-coblocks-animation.css?ver=2677611078ee87eb3b1c — 200 — 1.1 KiB — 43 ms — h2https://opensource.org/wp-content/mu-plugins/osi-editor-tweaks/build/styles/theme/theme.scss.css?ver=1.0.0/wp-content/mu-plugins/osi-editor-t... https://opensource.org/wp-content/mu-plugins/osi-editor-tweaks/build/styles/theme/theme.scss.css?ver=1.0.0 — 200 — 1.1 KiB — 66 ms — h2https://opensource.org/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=6.1.5/wp-content/plugins/contact-form-7/... https://opensource.org/wp-content/plugins/contact-form-7/includes/css/styles.css?ver=6.1.5 — 200 — 1.1 KiB — 62 ms — h2https://opensource.org/wp-content/plugins/events-manager/includes/css/events-manager.min.css?ver=7.2.3.1/wp-content/plugins/events-manager/... https://opensource.org/wp-content/plugins/events-manager/includes/css/events-manager.min.css?ver=7.2.3.1 — 200 — 49.2 KiB — 106 ms — h2https://opensource.org/wp-content/plugins/events-manager-pro/includes/css/events-manager-pro.css?ver=3.7.2.3/wp-content/plugins/events-manager-... https://opensource.org/wp-content/plugins/events-manager-pro/includes/css/events-manager-pro.css?ver=3.7.2.3 — 200 — 1.2 KiB — 79 ms — h2https://opensource.org/wp-content/plugins/indieweb/static/css/indieweb.css?ver=5.1.1/wp-content/plugins/indieweb/static... https://opensource.org/wp-content/plugins/indieweb/static/css/indieweb.css?ver=5.1.1 — 200 — 28.9 KiB — 84 ms — h2https://opensource.org/wp-content/plugins/webmention/assets/css/webmention.css?ver=5.7.0/wp-content/plugins/webmention/asse... https://opensource.org/wp-content/plugins/webmention/assets/css/webmention.css?ver=5.7.0 — 200 — 595 B — 73 ms — h2https://opensource.org/wp-content/plugins/wp-discourse/css/comments.css?ver=1769798368/wp-content/plugins/wp-discourse/cs... https://opensource.org/wp-content/plugins/wp-discourse/css/comments.css?ver=1769798368 — 200 — 1.0 KiB — 80 ms — h2https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.css?minify=false&ver=d2b75ca9909f29a1a53c/wp-content/plugins/jetpack/jetpack... https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.css?minify=false&ver=d2b75ca9909f29a1a53c — 200 — 5.1 KiB — 66 ms — h2https://opensource.org/wp-content/plugins/complianz-gdpr/assets/css/cookieblocker.min.css?ver=1776710359/wp-content/plugins/complianz-gdpr/... https://opensource.org/wp-content/plugins/complianz-gdpr/assets/css/cookieblocker.min.css?ver=1776710359 — 200 — 904 B — 75 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/css/dashicons.min.cssc0.wp.com/c/6.9.4/wp-includes/css/d... https://c0.wp.com/c/6.9.4/wp-includes/css/dashicons.min.css — 200 — 34.8 KiB — 67 ms — h2https://opensource.org/wp-content/plugins/gutenberg/build/styles/components/style.min.css?ver=22.9.0/wp-content/plugins/gutenberg/build... https://opensource.org/wp-content/plugins/gutenberg/build/styles/components/style.min.css?ver=22.9.0 — 200 — 14.4 KiB — 113 ms — h2https://opensource.org/wp-content/plugins/coblocks/includes/Dependencies/GoDaddy/Styles/build/latest.css?ver=2.0.2/wp-content/plugins/coblocks/includ... https://opensource.org/wp-content/plugins/coblocks/includes/Dependencies/GoDaddy/Styles/build/latest.css?ver=2.0.2 — 200 — 1.5 KiB — 114 ms — h2https://opensource.org/wp-content/themes/osi/style.css?ver=1750065233/wp-content/themes/osi/style.css?ve... https://opensource.org/wp-content/themes/osi/style.css?ver=1750065233 — 200 — 28.0 KiB — 100 ms — h2https://unpkg.com/swiper@11/swiper-bundle.min.css?ver=1750065233unpkg.com/swiper@11/swiper-bundle.m... https://unpkg.com/swiper@11/swiper-bundle.min.css?ver=1750065233 — 302 — 317 B — 165 ms — h3https://opensource.org/wp-content/plugins/jetpack/_inc/genericons/genericons/genericons.css?ver=3.1/wp-content/plugins/jetpack/_inc/ge... https://opensource.org/wp-content/plugins/jetpack/_inc/genericons/genericons/genericons.css?ver=3.1 — 200 — 15.8 KiB — 113 ms — h2https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-classic-theme-helper/src/social-menu/social-menu.css?ver=1.0/wp-content/plugins/jetpack/jetpack... https://opensource.org/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-classic-theme-helper/src/social-menu/social-menu.css?ver=1.0 — 200 — 1.0 KiB — 79 ms — h2https://opensource.org/wp-content/plugins/nelio-content-premium/includes/features/series/default.css?ver=4.3.2/wp-content/plugins/nelio-content-p... https://opensource.org/wp-content/plugins/nelio-content-premium/includes/features/series/default.css?ver=4.3.2 — 200 — 321 B — 113 ms — h2https://opensource.org/wp-content/plugins/syndication-links/css/syn.min.css?ver=4.5.3/wp-content/plugins/syndication-lin... https://opensource.org/wp-content/plugins/syndication-links/css/syn.min.css?ver=4.5.3 — 200 — 32.2 KiB — 113 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.jsc0.wp.com/c/6.9.4/wp-includes/js/jq... https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.js — 200 — 31.1 KiB — 25 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery-migrate.min.jsc0.wp.com/c/6.9.4/wp-includes/js/jq... https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery-migrate.min.js — 200 — 5.3 KiB — 25 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/core.min.jsc0.wp.com/c/6.9.4/wp-includes/js/jq... https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/ui/core.min.js — 200 — 7.5 KiB — 25 ms — h2
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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
29% of JavaScript execution is third-party
First-party Third-party 531ms · 31KB · $3/mo
Unattributable
Other
Costly
Execution 459ms
Transfer 0 KB
Monthly Cost $3/mo
c0.wp.com
Other
Optional
Execution 72ms
Transfer 31 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • Unattributable adds 459ms and costs ~$3/month

Unattributable takes 459ms 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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