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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

49
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
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.
77
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.

5.28 s

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

12.00 s

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

477 ms

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

0.023

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

5.42 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.

12.39 s

Page Load Progression

500 ms
1.0 s
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
16.2 MB transferred, 49 requests
FIX
16.2 MB transferred, 49 requests
Critical::
Page weighs 17.2 MB (16.2 MB transferred)
Warning::
Images are 1.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.6 MB
Info::
Fonts are 234 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 234 KB
Info::
49 HTTP requests
Info::
Estimated 3.4 g CO2 per page load
16.2 MB / 2.4 MB budget
16.2 MB transferred
49 requests
3.4 g CO2 per page load
Other 14.0 MiB 87%
Images 1.6 MiB 10%
JavaScript 308.9 KiB 2%
Fonts 234.0 KiB 1%
HTML 52.8 KiB 0%
CSS 35.3 KiB 0%
Other 1.1 KiB 0%
Other 772 B 0%
Other 596 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (16.2 MiB of 16.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4197ms total JS execution
FIX
4197ms total JS execution
Warning::
https://global.sil.org/: 1586ms CPU time
Warning::
Unattributable: 1349ms CPU time
Warning::
https://global.sil.org/cdn-cgi/challenge-platform/...: 299ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-NP2N...: 289ms CPU time
Info::
https://global.sil.org/wp-content/themes/blocksy/s...: 238ms CPU time
Warning::
Third-party scripts: 4197ms (100% of total)

Main Thread Breakdown

Other 35% Style & Layout 31% Script Evaluation 25% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://global.sil.org/1586ms249ms16ms3rd
Unattributable1349ms11ms0ms3rd
https://global.sil.org/cdn-cgi/challenge-platform/scripts/jsd/main.js299ms275ms4ms3rd
https://www.googletagmanager.com/gtag/js?id=G-NP2NCPNH1G289ms243ms45ms3rd
https://global.sil.org/wp-content/themes/blocksy/static/bundle/main.js?ver=2.1.38238ms31ms3ms3rd
https://global.sil.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1203ms63ms11ms3rd
https://giving.classy.org/embedded/api/sdk/js/84192145ms112ms30ms3rd
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312451689ms45ms4ms3rd
D
Page Weight Inventory
Action
49 resources · 16.2 MB · 112 KB savings available
FIX
49 resources · 16.2 MB · 112 KB savings available
Warning::
Page weight 15.2 MB over 1MB target
Got: 16.2 MB Expected: ≤ 1 MB
Info::
~112 KB of savings available
Warning::
48 third-party resources (100% of weight)
Info::
3 resources over 200KB
49 resources · 16.2 MiB · 48 third-party 15.2 MiB over 1MB target
Media 87% · 14.0 MiB
Image 10% · 1.6 MiB
JavaScript 2% · 308.9 KiB
Font 1% · 234.0 KiB
Document 0% · 53.2 KiB
CSS 0% · 35.3 KiB
Other 0% · 1.6 KiB

~112.3 KiB of savings available

Remove unused JavaScript: 112.3 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
https://global.sil.org/wp-content/uploads/sites/2/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 1.6 MB
0 oversized -0 KB
6 legacy format
1 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

B
JS Bundles
15 scripts, 112 KB unused
REVIEW
15 scripts, 112 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-NP2N...: 60 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://giving.classy.org/embedded/api/sdk/js/8419...: 53 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 112 KB
112 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-NP2NCPNH1G144 KB60 KB (42%)3rd
https://giving.classy.org/embedded/api/sdk/js/8419280 KB53 KB (66%)3rd
https://global.sil.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.15 KB3rd
https://global.sil.org/wp-content/plugins/google-analytics-premium/pro/assets/js/privacy-guard.min.js1 KB3rd
https://global.sil.org/wp-content/plugins/simple-banner/simple-banner.js?ver=3.2.12 KB3rd
https://global.sil.org/wp-content/themes/blocksy/static/bundle/main.js?ver=2.1.3810 KB3rd
https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_block_tabs.js?ver=3.19.71 KB3rd
https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_block_count_up.js?ver=3.19.71 KB3rd
https://global.sil.org/wp-content/plugins/google-analytics-premium/assets/js/frontend-gtag.min.js?ver=10.0.23 KB3rd
https://global.sil.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.131 KB3rd

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

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

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
6 fonts (234 KB)
PASS
6 fonts (234 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

234 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.3 s LCP 12.0 shttps://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/lora/v35/0QIvMX1D_JOuMwr7I_FMl_E.woff20QIvMX1D_JOuMwr7I_FMl_E... https://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/lora/v35/0QIvMX1D_JOuMwr7I_FMl_E.woff2 — 37.5 KiB — 930 ms — font-display: swaphttps://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/playfairdisplay/v37/nuFkD-vYSZviVYUb_rj3ij__anPXDTnogkk7yRZrPA.woff2nuFkD-vYSZviVYUb_rj3ij_... https://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/playfairdisplay/v37/nuFkD-vYSZviVYUb_rj3ij__anPXDTnogkk7yRZrPA.woff2 — 38.8 KiB — 936 ms — font-display: swaphttps://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/playfairdisplay/v37/nuFiD-vYSZviVYUb_rj3ij__anPXDTzYgEM86xQ.woff2nuFiD-vYSZviVYUb_rj3ij_... https://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/playfairdisplay/v37/nuFiD-vYSZviVYUb_rj3ij__anPXDTzYgEM86xQ.woff2 — 38.2 KiB — 935 ms — font-display: swaphttps://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/sourcesans3/v15/nwpStKy2OAdR1K-IwhWudF-R3w8aZejf5Hc.woff2nwpStKy2OAdR1K-IwhWudF-... https://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/sourcesans3/v15/nwpStKy2OAdR1K-IwhWudF-R3w8aZejf5Hc.woff2 — 28.8 KiB — 926 ms — font-display: swaphttps://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/caveat/v18/Wnz6HAc5bAfYB2Q7ZjYYiAzcPA.woff2Wnz6HAc5bAfYB2Q7ZjYYiAz... https://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/caveat/v18/Wnz6HAc5bAfYB2Q7ZjYYiAzcPA.woff2 — 73.0 KiB — 911 ms — font-display: swaphttps://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/lora/v35/0QIvMX1D_JOuM2T7I_FMl_GW8g.woff20QIvMX1D_JOuM2T7I_FMl_G... https://www.silglobal.site/wp-content/uploads/sites/2/blocksy/local-google-fonts/s/lora/v35/0QIvMX1D_JOuM2T7I_FMl_GW8g.woff2 — 17.6 KiB — 794 ms — font-display: swap
0QIvMX1D_JOuMwr7I_FMl_E... woff2 swap
Size 38 KB
Load time 930 ms
Start 479 ms
Risk FOUT — text flashes from fallback to web font
nuFkD-vYSZviVYUb_rj3ij_... woff2 swap
Size 39 KB
Load time 936 ms
Start 480 ms
Risk FOUT — text flashes from fallback to web font
nuFiD-vYSZviVYUb_rj3ij_... woff2 swap
Size 38 KB
Load time 935 ms
Start 480 ms
Risk FOUT — text flashes from fallback to web font
nwpStKy2OAdR1K-IwhWudF-... woff2 swap
Size 29 KB
Load time 926 ms
Start 480 ms
Risk FOUT — text flashes from fallback to web font
Wnz6HAc5bAfYB2Q7ZjYYiAz... woff2 swap
Size 73 KB
Load time 911 ms
Start 481 ms
Risk FOUT — text flashes from fallback to web font
0QIvMX1D_JOuM2T7I_FMl_G... woff2 swap
Size 18 KB
Load time 794 ms
Start 627 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)
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
preload
dns-prefetch
1
prefetch

1 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

Network Waterfall
49 requests over 1668ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.3 s LCP 12.0 shttps://sil.org// https://sil.org/ — 301 — 92 B — 33 ms — h2https://www.sil.org/www.sil.org/ https://www.sil.org/ — 301 — 380 B — 118 ms — h2https://global.sil.org/global.sil.org/ https://global.sil.org/ — 200 — 52.8 KiB — 87 ms — h2https://global.sil.org/wp-content/plugins/google-analytics-premium/pro/assets/js/privacy-guard.min.jsglobal.sil.org/wp-content/plugins/g... https://global.sil.org/wp-content/plugins/google-analytics-premium/pro/assets/js/privacy-guard.min.js — 200 — 584 B — 49 ms — h2https://www.googletagmanager.com/gtag/js?id=G-NP2NCPNH1Gwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-NP2NCPNH1G — 200 — 143.7 KiB — 156 ms — h2https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_blocks.css?ver=3.19.7global.sil.org/wp-content/plugins/s... https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_blocks.css?ver=3.19.7 — 200 — 13.2 KiB — 33 ms — h2https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_blocks__premium_only.css?ver=3.19.7global.sil.org/wp-content/plugins/s... https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_blocks__premium_only.css?ver=3.19.7 — 200 — 1.2 KiB — 35 ms — h2https://global.sil.org/wp-content/plugins/simple-banner/simple-banner.css?ver=3.2.1global.sil.org/wp-content/plugins/s... https://global.sil.org/wp-content/plugins/simple-banner/simple-banner.css?ver=3.2.1 — 200 — 374 B — 44 ms — h2https://global.sil.org/wp-content/themes/blocksy/style.css?ver=6.9.4global.sil.org/wp-content/themes/bl... https://global.sil.org/wp-content/themes/blocksy/style.css?ver=6.9.4 — 200 — 567 B — 37 ms — h2https://global.sil.org/wp-content/themes/blocksy/static/bundle/main.min.css?ver=2.1.38global.sil.org/wp-content/themes/bl... https://global.sil.org/wp-content/themes/blocksy/static/bundle/main.min.css?ver=2.1.38 — 200 — 17.6 KiB — 49 ms — h2https://global.sil.org/wp-content/themes/blocksy/static/bundle/stackable.min.css?ver=2.1.38global.sil.org/wp-content/themes/bl... https://global.sil.org/wp-content/themes/blocksy/static/bundle/stackable.min.css?ver=2.1.38 — 200 — 242 B — 54 ms — h2https://global.sil.org/wp-content/plugins/blocksy-companion-pro/framework/premium/static/bundle/search-input.min.css?ver=2.1.38global.sil.org/wp-content/plugins/b... https://global.sil.org/wp-content/plugins/blocksy-companion-pro/framework/premium/static/bundle/search-input.min.css?ver=2.1.38 — 200 — 213 B — 44 ms — h2https://global.sil.org/wp-content/plugins/blocksy-companion-pro/framework/premium/extensions/mega-menu/static/bundle/main.min.css?ver=2.1.38global.sil.org/wp-content/plugins/b... https://global.sil.org/wp-content/plugins/blocksy-companion-pro/framework/premium/extensions/mega-menu/static/bundle/main.min.css?ver=2.1.38 — 200 — 1.4 KiB — 34 ms — h2https://global.sil.org/wp-content/plugins/blocksy-companion-pro/framework/premium/extensions/post-types-extra/static/bundle/main.min.css?ver=2.1.38global.sil.org/wp-content/plugins/b... https://global.sil.org/wp-content/plugins/blocksy-companion-pro/framework/premium/extensions/post-types-extra/static/bundle/main.min.css?ver=2.1.38 — 200 — 541 B — 45 ms — h2https://global.sil.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1global.sil.org/wp-includes/js/jquer... https://global.sil.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 — 200 — 30.9 KiB — 55 ms — h2https://global.sil.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1global.sil.org/wp-includes/js/jquer... https://global.sil.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1 — 200 — 5.0 KiB — 52 ms — h2https://global.sil.org/wp-content/plugins/simple-banner/simple-banner.js?ver=3.2.1global.sil.org/wp-content/plugins/s... https://global.sil.org/wp-content/plugins/simple-banner/simple-banner.js?ver=3.2.1 — 200 — 2.0 KiB — 54 ms — h2https://global.sil.org/wp-content/uploads/sites/2/2024/06/sil_glyph_logo_taiheritagepro_rgb-768x413.pngglobal.sil.org/wp-content/uploads/s... https://global.sil.org/wp-content/uploads/sites/2/2024/06/sil_glyph_logo_taiheritagepro_rgb-768x413.png — 200 — 9.3 KiB — 144 ms — h3https://global.sil.org/wp-content/themes/blocksy/static/bundle/main.js?ver=2.1.38global.sil.org/wp-content/themes/bl... https://global.sil.org/wp-content/themes/blocksy/static/bundle/main.js?ver=2.1.38 — 200 — 10.4 KiB — 52 ms — h3https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_block_tabs.js?ver=3.19.7global.sil.org/wp-content/plugins/s... https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_block_tabs.js?ver=3.19.7 — 200 — 1.4 KiB — 16 ms — h3https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_block_count_up.js?ver=3.19.7global.sil.org/wp-content/plugins/s... https://global.sil.org/wp-content/plugins/stackable-ultimate-gutenberg-blocks-premium/dist/frontend_block_count_up.js?ver=3.19.7 — 200 — 1.3 KiB — 23 ms — h3https://global.sil.org/wp-content/plugins/google-analytics-premium/assets/js/frontend-gtag.min.js?ver=10.0.2global.sil.org/wp-content/plugins/g... https://global.sil.org/wp-content/plugins/google-analytics-premium/assets/js/frontend-gtag.min.js?ver=10.0.2 — 200 — 3.4 KiB — 22 ms — h3https://giving.classy.org/embedded/api/sdk/js/84192giving.classy.org/embedded/api/sdk/... https://giving.classy.org/embedded/api/sdk/js/84192 — 200 — 80.1 KiB — 152 ms — h2https://global.sil.org/wp-content/uploads/sites/2/20161002Thailand273-768x512.jpgglobal.sil.org/wp-content/uploads/s... https://global.sil.org/wp-content/uploads/sites/2/20161002Thailand273-768x512.jpg — 200 — 55.8 KiB — 156 ms — h3https://global.sil.org/wp-content/uploads/sites/2/120306-395Zeke-CAR-768x512.jpgglobal.sil.org/wp-content/uploads/s... https://global.sil.org/wp-content/uploads/sites/2/120306-395Zeke-CAR-768x512.jpg — 200 — 108.6 KiB — 155 ms — h3https://global.sil.org/wp-content/uploads/sites/2/Large_20190604Guatemala147-768x512.jpgglobal.sil.org/wp-content/uploads/s... https://global.sil.org/wp-content/uploads/sites/2/Large_20190604Guatemala147-768x512.jpg — 200 — 144.8 KiB — 377 ms — h3https://global.sil.org/wp-content/uploads/sites/2/SIL_WorldMap_RobinsonProjection_UPDATED.pngglobal.sil.org/wp-content/uploads/s... https://global.sil.org/wp-content/uploads/sites/2/SIL_WorldMap_RobinsonProjection_UPDATED.png — 200 — 108.5 KiB — 47 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
100% of JavaScript execution is third-party
First-party Third-party 4197ms · 329KB · $56/mo
global.sil.org
Other
Costly
Execution 1586ms
Transfer 53 KB
Monthly Cost $21/mo
Unattributable
Other
Costly
Execution 1349ms
Transfer 0 KB
Monthly Cost $18/mo
global.sil.org
Other
Costly
Execution 299ms
Transfer 0 KB
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 289ms
Transfer 144 KB
Unused 42%
Monthly Cost $4/mo
global.sil.org
Other
Costly
Execution 238ms
Transfer 10 KB
Monthly Cost $3/mo
global.sil.org
Other
Costly
Execution 203ms
Transfer 31 KB
Monthly Cost $3/mo
giving.classy.org
Other
Optional
Execution 145ms
Transfer 80 KB
Unused 66%
Monthly Cost $2/mo
static.cloudflareinsights.com
Other
Optional
Execution 89ms
Transfer 11 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • global.sil.org adds 1586ms and costs ~$21/month
  • Unattributable adds 1349ms and costs ~$18/month
  • global.sil.org adds 299ms and costs ~$4/month
  • Google Tag Manager adds 289ms and costs ~$4/month
  • global.sil.org adds 238ms and costs ~$3/month
  • global.sil.org adds 203ms and costs ~$3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

global.sil.org takes 1586ms 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

Unattributable takes 1349ms 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

global.sil.org takes 299ms 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

Google Tag Manager takes 289ms 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

global.sil.org takes 238ms 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

global.sil.org takes 203ms 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

66% of giving.classy.org's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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