Performance
· 15 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.
1.02 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.75 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
191 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.156
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.73 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.
7.05 s
Page Load Progression
FPage Weight BudgetAction5.4 MB transferred, 286 requestsFIX
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
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
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.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2788ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=2026042207 | 450ms | 214ms | 6ms | 3rd |
| Unattributable | 371ms | 12ms | 0ms | 3rd |
| https://static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js | 312ms | 267ms | 13ms | 3rd |
| https://www.edf.org/ | 293ms | 7ms | 2ms | 3rd |
| https://js.stripe.com/v3/ | 230ms | 167ms | 46ms | 3rd |
| https://cdn.fundraiseup.com/widget/AQBHBSYR | 195ms | 179ms | 5ms | 3rd |
| https://admin-pipeline.upsun-us-2.observability-pipeline.blackfire.io/js/probe.js | 179ms | 139ms | 2ms | 3rd |
| https://static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js | 120ms | 101ms | 7ms | 3rd |
| https://static.fundraiseup.com/donation-form.41b66f2219e57ec2.js | 106ms | 92ms | 3ms | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/d4db359b93044eca900e8363b7f9fd2e.js | 103ms | 99ms | 3ms | 3rd |
Showing top 10 of 16 scripts
FJS BundlesAction98 scripts, 834 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://static.fundraiseup.com/checkout.621abe447e62aa70.js | 411 KB | 246 KB (60%) | ✓ | 3rd |
| https://js.stripe.com/v3/ | 221 KB | 134 KB (61%) | ✓ | 3rd |
| https://js.stripe.com/v3/ | 0 KB | 134 KB (61%) | ✓ | 3rd |
| https://static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js | 112 KB | 87 KB (78%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-4390944 | 131 KB | 53 KB (41%) | ✓ | 3rd |
| https://static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js | 105 KB | 50 KB (48%) | ✓ | 3rd |
| https://www.paypal.com/sdk/js?client-id=Afbm69ig8nMRLmZKS-QoONq7qIHPqlpYJ1l3vyxE_la-UZPU_eEkKH2HRpHFkl7SNJ8a_eKvDkcT9-My&merchant-id=L2AJ4MELBNEV4¤cy=USD&disable-funding=venmo&locale=en_US&intent=tokenize&vault=true | 98 KB | 44 KB (46%) | ✓ | 3rd |
| https://admin-pipeline.upsun-us-2.observability-pipeline.blackfire.io/js/probe.js | 97 KB | 32 KB (33%) | ✓ | 3rd |
| https://assets.edfcdn.org/assets/global/dist/js/utilities.min.js?v=2026042207 | 85 KB | 28 KB (33%) | ✓ | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/d4db359b93044eca900e8363b7f9fd2e.js | 56 KB | 26 KB (47%) | ✓ | 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
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
FPage Weight InventoryAction286 resources · 5.4 MB · 834 KB savings availableFIX
~834.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 286 resources | 5.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization68 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
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 Loading11 fonts (219 KB)PASS
Web fonts
11
219 KB total
Render-blocking
0
of 11
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 HintsNo optimization neededPASS
Network Waterfall286 requests over 7687msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
assets.edfcdn.org assets.edfcdn.org | Other | 450ms | 85 KB | 33% | €5/mo | Costly |
Unattributable Unattributable | Other | 371ms | 0 KB | — | €4/mo | Costly |
static.fundraiseup.com static.fundraiseup.com | Other | 312ms | 105 KB | 48% | €3/mo | Costly |
www.edf.org www.edf.org | Other | 293ms | 253 KB | — | €3/mo | Costly |
Stripe js.stripe.com | Payment | 230ms | 0 KB | 61% | €2/mo | Essential |
cdn.fundraiseup.com cdn.fundraiseup.com | Other | 195ms | 65 KB | — | €2/mo | Optional |
admin-pipeline.upsun-us-2.observability-pipeline.blackfire.io admin-pipeline.upsun-us-2.observability-pipeline.blackfire.io | Other | 179ms | 97 KB | 33% | €2/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 120ms | 112 KB | 78% | €1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 106ms | 37 KB | — | €1/mo | Optional |
script.crazyegg.com script.crazyegg.com | Other | 103ms | 56 KB | 47% | €1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 93ms | 411 KB | 60% | €1/mo | Optional |
PayPal www.paypal.com | Payment | 93ms | 98 KB | 46% | €1/mo | Essential |
Microsoft Clarity scripts.clarity.ms | Session Replay | 72ms | 26 KB | — | €1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 68ms | 37 KB | — | €1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 51ms | 16 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 51ms | 131 KB | 41% | €1/mo | Optional |
These scripts may cost more than they're worth
- assets.edfcdn.org adds 450ms and costs ~€5/month
- Unattributable adds 371ms and costs ~€4/month
- static.fundraiseup.com adds 312ms and costs ~€3/month
- www.edf.org adds 293ms and costs ~€3/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
assets.edfcdn.org takes 450ms 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 371ms 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
static.fundraiseup.com takes 312ms 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.edf.org takes 293ms 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
61% of Stripe'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
78% of static.fundraiseup.com'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
60% of static.fundraiseup.com'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