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.
2.03 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.55 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
426 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.008
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.68 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.
7.68 s
Page Load Progression
652 ms
1.3 s
2.0 s 2.6 s 3.3 s
3.9 s
4.6 s
5.2 sFPage Weight BudgetAction4.0 MB transferred, 374 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
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 CostAction2781ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ama-assn.org/ | 636ms | 136ms | 5ms | 3rd |
| Unattributable | 520ms | 112ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PKMFTL7&l=gaDataLayer | 385ms | 336ms | 24ms | 3rd |
| https://cdn.quantummetric.com/qscripts/quantum-ama.js | 175ms | 164ms | 7ms | 3rd |
| https://cdn.optimizely.com/js/1063362107.js | 113ms | 93ms | 10ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-308377546&l=gaDataLayer&cx=c>m=4e64h1 | 86ms | 70ms | 15ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-806434910&l=gaDataLayer&cx=c>m=4e64h1 | 85ms | 75ms | 10ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 84ms | 63ms | 20ms | 3rd |
| https://cdn.aimtell.com/trackpush/trackpush.min.js | 82ms | 73ms | 1ms | 3rd |
| https://www.ama-assn.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 79ms | 76ms | 0ms | 3rd |
Showing top 10 of 18 scripts
FJS BundlesAction155 scripts, 952 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-ZW7W3DGP5K&l=gaDataLayer&cx=c>m=4e64h1 | 166 KB | 69 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NGYQD9R7ZM&l=gaDataLayer&cx=c>m=4e64h1 | 170 KB | 68 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-GCYLTYGWMZ&l=gaDataLayer&cx=c>m=4e64h1 | 161 KB | 66 KB (41%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202504.1.0/otBannerSdk.js | 118 KB | 62 KB (53%) | ✓ | 3rd |
| https://cdn.optimizely.com/js/1063362107.js | 134 KB | 62 KB (46%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-806434910&l=gaDataLayer&cx=c>m=4e64h1 | 145 KB | 56 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-8896215&l=gaDataLayer&cx=c>m=4e64h1 | 130 KB | 56 KB (43%) | ✓ | 3rd |
| https://cdn.inpwrd.net/track/1.0.0/bundle.min.js | 94 KB | 55 KB (59%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-308377546&l=gaDataLayer&cx=c>m=4e64h1 | 137 KB | 55 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-770824921&l=gaDataLayer&cx=c>m=4e64h1 | 138 KB | 55 KB (40%) | ✓ | 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 InventoryAction374 resources · 4.0 MB · 952 KB savings availableFIX
~951.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 374 resources | 4.0 MiB | ||||||
CImage OptimizationAction69 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
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 Loading16 fonts (468 KB)PASS
Web fonts
16
468 KB total
Render-blocking
0
of 16
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 ~174 KB and ~348 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
AHTTP Cachingmax-age=1209600 (2 weeks)PASS
max-age=1209600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 1209600 | Cache for 2 weeks |
Network Waterfall374 requests over 5673msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ama-assn.org www.ama-assn.org | Other | 636ms | 60 KB | — | $12/mo | Costly |
Unattributable Unattributable | Other | 520ms | 0 KB | — | $10/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 385ms | 205 KB | 26% | $7/mo | Costly |
cdn.quantummetric.com cdn.quantummetric.com | Other | 175ms | 110 KB | 28% | $3/mo | Optional |
Optimizely cdn.optimizely.com | A/B Testing | 113ms | 134 KB | 46% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 86ms | 137 KB | 40% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 85ms | 145 KB | 39% | $2/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 84ms | 110 KB | 50% | $2/mo | Optional |
cdn.aimtell.com cdn.aimtell.com | Other | 82ms | 14 KB | — | $2/mo | Optional |
www.ama-assn.org www.ama-assn.org | Other | 79ms | 0 KB | — | $1/mo | Optional |
cdn.evgnet.com cdn.evgnet.com | Other | 78ms | 46 KB | 45% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 77ms | 170 KB | 40% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 67ms | 161 KB | 41% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 67ms | 138 KB | 39% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 63ms | 166 KB | 41% | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 63ms | 118 KB | 53% | $1/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 61ms | 130 KB | 43% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 58ms | 138 KB | 40% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.ama-assn.org adds 636ms and costs ~$12/month
- Unattributable adds 520ms and costs ~$10/month
- Google Tag Manager adds 385ms and costs ~$7/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
www.ama-assn.org takes 636ms 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 520ms 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 385ms 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
53% of OneTrust'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