Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.60 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.83 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
302 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.085
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.39 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.
9.26 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.2 MB transferred, 82 requestsREVIEW
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
CImage OptimizationAction27 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CJS Execution CostAction1765ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-5W8PXYYGBX&cx=c>m=4e64h1 | 414ms | 355ms | 41ms | 3rd |
| Unattributable | 360ms | 52ms | 0ms | 3rd |
| https://www.guidestar.org/ | 299ms | 22ms | 5ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N73TN3 | 273ms | 215ms | 43ms | 3rd |
| https://geo.cookie-script.com/s/5f9a2e913c6ef4fa7d92f3704da6d001.js?state=ca®ion=eu | 163ms | 115ms | 12ms | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97ms | 71ms | 26ms | 3rd |
| https://cdn.segment.com/analytics-next/bundles/schemaFilter.bundle.1b218d13fed021531d4e.js | 88ms | 84ms | 1ms | 3rd |
| https://www.guidestar.org/bundles/js/jquery?v=JVBM4Dk7eZ-fjWvmxvoCeVR5MAt_3YXn4K7MRdHsuR81 | 71ms | 55ms | 8ms | 3rd |
CJS BundlesAction20 scripts, 193 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-5W8PXYYGBX&cx=c>m=4e64h1 | 176 KB | 63 KB (36%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N73TN3 | 162 KB | 61 KB (38%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 47 KB (48%) | ✓ | 3rd |
| https://www.guidestar.org/bundles/js/jquery?v=JVBM4Dk7eZ-fjWvmxvoCeVR5MAt_3YXn4K7MRdHsuR81 | 39 KB | 22 KB (57%) | ✓ | 3rd |
| https://cdn.segment.com/analytics.js/v1/Chi5ABMK5vHsy2bZlFo72shyba0F1jJX/analytics.min.js | 29 KB | — | ✓ | 3rd |
| https://pi.pardot.com/pd.js | 2 KB | — | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.min.js | 15 KB | — | ✓ | 3rd |
| https://geo.cookie-script.com/s/5f9a2e913c6ef4fa7d92f3704da6d001.js?state=ca®ion=eu | 27 KB | — | ✓ | 3rd |
| https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js | 7 KB | — | ✓ | 3rd |
| https://dev.visualwebsiteoptimizer.com/j.php?a=738966&u=https%3A%2F%2Fwww.guidestar.org%2F&f=1&vn=1.5 | 4 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
CPage Weight InventoryAction82 resources · 1.2 MB · 193 KB savings availableREVIEW
~192.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 82 resources | 1.2 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (116 KB)PASS
Web fonts
6
116 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints1 hints, 0 missing preconnectsPASS
Current Resource Hints
1 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall82 requests over 3694msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 414ms | 176 KB | 36% | €7/mo | Costly |
Unattributable Unattributable | Other | 360ms | 0 KB | — | €6/mo | Costly |
www.guidestar.org www.guidestar.org | Other | 299ms | 8 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 273ms | 162 KB | 38% | €5/mo | Costly |
geo.cookie-script.com geo.cookie-script.com | Other | 163ms | 27 KB | — | €3/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 97ms | 97 KB | 48% | €2/mo | Optional |
Segment cdn.segment.com | Analytics | 88ms | 1 KB | — | €2/mo | Optional |
www.guidestar.org www.guidestar.org | Other | 71ms | 39 KB | 57% | €1/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 414ms and costs ~€7/month
- Unattributable adds 360ms and costs ~€6/month
- www.guidestar.org adds 299ms and costs ~€5/month
- Google Tag Manager adds 273ms and costs ~€5/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
Google Tag Manager takes 414ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 360ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.guidestar.org takes 299ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 273ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
57% of www.guidestar.org's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev