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.
2.90 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.63 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.15 s
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.
3.88 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.
13.43 s
Page Load Progression
DPage Weight BudgetAction2.3 MB transferred, 62 requestsFIX
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
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
DThird-Party ImpactAction99% third-party, 0 ms blockingFIX
FJS Execution CostAction5049ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js | 875ms | 669ms | 202ms | 3rd |
| Unattributable | 871ms | 11ms | 0ms | 3rd |
| https://diabetesjournals.org/ | 478ms | 75ms | 10ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-FTXWEM50WN&cx=c>m=4e64h1 | 426ms | 350ms | 71ms | 3rd |
| https://ada.silverchair-cdn.com/Themes/Client/app/jsdist/v-639116339596819122/site.min.js | 426ms | 173ms | 74ms | 3rd |
| https://diabetesjournals.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 402ms | 386ms | 4ms | 1st |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945 | 319ms | 223ms | 93ms | 3rd |
| https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js | 273ms | 212ms | 14ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5QJGFRR | 260ms | 200ms | 56ms | 3rd |
| https://play.cadmore.media/js/GALLERY_V2.js | 158ms | 144ms | 3ms | 3rd |
Showing top 10 of 15 scripts
FJS BundlesAction24 scripts, 526 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945 | 188 KB | 144 KB (77%) | ✓ | 3rd |
| https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js | 252 KB | 122 KB (49%) | ✓ | 3rd |
| https://ada.silverchair-cdn.com/Themes/Client/app/jsdist/v-639116339596819122/site.min.js | 136 KB | 108 KB (80%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-FTXWEM50WN&cx=c>m=4e64h1 | 157 KB | 64 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5QJGFRR | 123 KB | 62 KB (50%) | ✓ | 3rd |
| https://platform-api.sharethis.com/js/sharethis.js | 47 KB | 27 KB (59%) | ✗ | 3rd |
| https://play.cadmore.media/js/PLAYLIST_V2.js | 7 KB | — | ✗ | 3rd |
| https://ada.silverchair-cdn.com/Themes/Silver/app/vendor/v-639102489972463725/jquery-migrate-3.1.0.min.js | 4 KB | — | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/tag/js/gpt.js | 34 KB | — | ✓ | 3rd |
| https://widgets.figshare.com/static/figshare.js | 36 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
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 InventoryAction62 resources · 2.3 MB · 526 KB savings availableFIX
~526.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 62 resources | 2.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction14 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (21 KB)PASS
Web fonts
1
21 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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 ~6 KB and ~12 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall62 requests over 7852msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
jsDelivr cdn.jsdelivr.net | CDN | 875ms | 252 KB | 49% | $12/mo | Costly |
Unattributable Unattributable | Other | 871ms | 0 KB | — | $12/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 426ms | 157 KB | 41% | $6/mo | Costly |
ada.silverchair-cdn.com ada.silverchair-cdn.com | Other | 426ms | 136 KB | 80% | $6/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 319ms | 188 KB | 77% | $4/mo | Costly |
ajax.googleapis.com ajax.googleapis.com | Other | 273ms | 31 KB | — | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 260ms | 123 KB | 50% | $3/mo | Costly |
play.cadmore.media play.cadmore.media | Other | 158ms | 5 KB | — | $2/mo | Optional |
widgets.figshare.com widgets.figshare.com | Other | 147ms | 36 KB | — | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 130ms | 34 KB | — | $2/mo | Optional |
aim-tag.hcn.health aim-tag.hcn.health | Other | 116ms | 29 KB | — | $2/mo | Optional |
platform-api.sharethis.com platform-api.sharethis.com | Other | 88ms | 47 KB | 59% | $1/mo | Optional |
play.cadmore.media play.cadmore.media | Other | 80ms | 7 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- jsDelivr adds 875ms and costs ~$12/month
- Unattributable adds 871ms and costs ~$12/month
- Google Tag Manager adds 426ms and costs ~$6/month
- ada.silverchair-cdn.com adds 426ms and costs ~$6/month
- securepubads.g.doubleclick.net adds 319ms and costs ~$4/month
- ajax.googleapis.com adds 273ms and costs ~$4/month
- Google Tag Manager adds 260ms and costs ~$3/month
83% 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
jsDelivr takes 875ms 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 871ms 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 426ms 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
ada.silverchair-cdn.com takes 426ms 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
80% of ada.silverchair-cdn.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
securepubads.g.doubleclick.net takes 319ms 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
77% of securepubads.g.doubleclick.net'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
ajax.googleapis.com 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
Google Tag Manager takes 260ms 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
50% of Google Tag Manager'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
59% of platform-api.sharethis.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