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.
641 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
525 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.011
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.70 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.
9.09 s
Page Load Progression
FPage Weight BudgetAction5.5 MB transferred, 326 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 ImpactAction73% third-party, 0 ms blockingFIX
DJS Execution CostAction3122ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 714ms | 40ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PT2TCFXN | 498ms | 429ms | 33ms | 3rd |
| https://diabetes.org/ | 303ms | 6ms | 1ms | 1st |
| https://diabetes.org/sites/default/files/js/js_Oljhyr60UmGdyJlX1mV7ztKQAtq6sLgqT1j9GdoVEwA.js?scope=footer&delta=0&language=en&theme=diabetespro&include=eJx1UtGSgyAM_CEon8REiIgicRLo1b-_tE5vzk59yWR3kV0SIYIfe40MWbBvDs7YQIyNoO7u3dxGptoMiGDzuc4YGrGb5YaTeGk5LLsfoFZkP4sZsDXt8LGRYPRjLgrFQW_kpQ9rbldHEuoVUK7kkusivgt6mOFhAhXigR5OGoVlorLKro-gFf8kDasfofvAJkKDAjuyG3CCeyYWEzOoL8rG5AJwtFpIzcoXRacBeg-fJWI8EXjH2i4OT8hkj5l9NypQU4eEVgWd90kTBA6TvWf8OfNFV2G1xg-3vgVac032FUlMIkoFfYPkkpZPfHvN90SuZkURzaOLZvevN1SxcZfmA9GSlSu6DfVyB7ZvbI7UHrbsn_-CJtqKBnQXvHk-T3RjY665oZfAVIp7sfbN2oP9BTjeHWU | 170ms | 114ms | 6ms | 1st |
| https://static.fundraiseup.com/link-v2.0cc05dda47c51ab7.js | 157ms | 82ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-JQDP2V81FZ&cx=c>m=4e64h1h1 | 145ms | 104ms | 34ms | 3rd |
| https://connect.facebook.net/signals/config/1079868055521730?v=2.9.303&r=stable&domain=diabetes.org&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168 | 112ms | 93ms | 12ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1069977158&cx=c>m=4e64h1h1 | 110ms | 95ms | 14ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10994078208&cx=c>m=4e64h1h1 | 97ms | 78ms | 18ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 93ms | 74ms | 15ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction85 scripts, 1.6 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://static.fundraiseup.com/checkout.9e2624d0be733d7f.js | 410 KB | 366 KB (89%) | ✓ | 3rd |
| https://static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js | 112 KB | 112 KB (100%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1070296966 | 150 KB | 107 KB (71%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-12833848 | 150 KB | 107 KB (71%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1069977158 | 147 KB | 105 KB (72%) | ✓ | 3rd |
| https://static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js | 105 KB | 87 KB (83%) | ✓ | 3rd |
| https://diabetes.org/sites/default/files/js/js_eqmCcXdl8sRCo6NdUo8-L5LPHXDtCUo1hk5eaVvggqY.js?scope=footer&delta=3&language=en&theme=diabetespro&include=eJx1UtGSgyAM_CEon8REiIgicRLo1b-_tE5vzk59yWR3kV0SIYIfe40MWbBvDs7YQIyNoO7u3dxGptoMiGDzuc4YGrGb5YaTeGk5LLsfoFZkP4sZsDXt8LGRYPRjLgrFQW_kpQ9rbldHEuoVUK7kkusivgt6mOFhAhXigR5OGoVlorLKro-gFf8kDasfofvAJkKDAjuyG3CCeyYWEzOoL8rG5AJwtFpIzcoXRacBeg-fJWI8EXjH2i4OT8hkj5l9NypQU4eEVgWd90kTBA6TvWf8OfNFV2G1xg-3vgVac032FUlMIkoFfYPkkpZPfHvN90SuZkURzaOLZvevN1SxcZfmA9GSlSu6DfVyB7ZvbI7UHrbsn_-CJtqKBnQXvHk-T3RjY665oZfAVIp7sfbN2oP9BTjeHWU | 124 KB | 83 KB (67%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-JQDP2V81FZ&cx=c>m=4e64h1h1 | 178 KB | 67 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-12516592&cx=c>m=4e64h1h1 | 129 KB | 61 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-10227227&cx=c>m=4e64h1h1 | 129 KB | 57 KB (44%) | ✓ | 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 InventoryAction326 resources · 5.5 MB · 1.6 MB savings availableFIX
~1.6 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 326 resources | 5.5 MiB | ||||||
CImage OptimizationAction91 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading8 fonts (593 KB)PASS
Web fonts
8
593 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~160 KB and ~320 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A+HTTP Cachingmax-age=604800 (1 week)PASS
max-age=604800, public
| Directive | Value | Meaning |
|---|---|---|
| max-age | 604800 | Cache for 1 week |
| public | — | Any cache may store this response |
Network Waterfall326 requests over 9214msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 714ms | 0 KB | — | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 498ms | 202 KB | 26% | €3/mo | Costly |
static.fundraiseup.com static.fundraiseup.com | Other | 157ms | 1 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 145ms | 178 KB | 37% | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 112ms | 122 KB | 22% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 110ms | 147 KB | 36% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 97ms | 138 KB | 40% | €1/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 93ms | 110 KB | 52% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 84ms | 129 KB | 44% | €1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 84ms | 10 KB | — | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 83ms | 97 KB | 36% | €1/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 81ms | 105 KB | 83% | €1/mo | Optional |
Microsoft Clarity scripts.clarity.ms | Session Replay | 80ms | 26 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 72ms | 151 KB | 35% | €0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 68ms | 129 KB | 47% | €0/mo | Optional |
cdn.fundraiseup.com cdn.fundraiseup.com | Other | 59ms | 66 KB | 32% | €0/mo | Optional |
static.fundraiseup.com static.fundraiseup.com | Other | 59ms | 410 KB | 89% | €0/mo | Optional |
siteintercept.qualtrics.com siteintercept.qualtrics.com | Other | 54ms | 19 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 714ms and costs ~€5/month
- Google Tag Manager adds 498ms and costs ~€3/month
85% 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
Unattributable takes 714ms 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 498ms 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
52% of analytics.tiktok.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
83% 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
89% 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