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.
4.78 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
17.71 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
366 ms
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.
9.33 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.
18.16 s
Page Load Progression
FPage Weight BudgetAction3.1 MB transferred, 124 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
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 CostAction2756ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 537ms | 20ms | 0ms | 3rd |
| https://www.medscape.com/ | 360ms | 69ms | 25ms | 3rd |
| https://img.medscapestatic.com/medscape-core/common/js/global/medscape-script/all-scripts-no-defer.js | 358ms | 221ms | 7ms | 3rd |
| https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js | 348ms | 226ms | 56ms | 3rd |
| https://www.medscape.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 257ms | 242ms | 2ms | 3rd |
| https://assets.adobedtm.com/2c8c1e17b98c/017edbc80c83/launch-88df53f8d9c8.min.js | 210ms | 172ms | 24ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604090102/pubads_impl.js?cb=31097906 | 192ms | 135ms | 42ms | 3rd |
| https://img.medscapestatic.com/medscape-core/www-content/js/homepage/homepage.js | 141ms | 111ms | 26ms | 3rd |
| https://securepubads.g.doubleclick.net/tag/js/gpt.js | 100ms | 92ms | 8ms | 3rd |
| https://img.medscapestatic.com/pi/scripts/omniture/bi_medscape.js | 97ms | 70ms | 13ms | 3rd |
Showing top 10 of 12 scripts
DPage Weight InventoryAction124 resources · 3.1 MB · 291 KB savings availableFIX
~290.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 124 resources | 3.1 MiB | ||||||
CImage OptimizationAction80 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
CJS BundlesAction20 scripts, 291 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604090102/pubads_impl.js?cb=31097906 | 188 KB | 141 KB (75%) | ✓ | 3rd |
| https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js | 161 KB | 78 KB (48%) | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/www-content/js/homepage/homepage.js | 86 KB | 41 KB (47%) | ✓ | 3rd |
| https://img.medscapestatic.com/pi/scripts/omniture/bi_medscape.js | 53 KB | 31 KB (58%) | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/shared-all/js/vendor/medscape-vt.js | 1 KB | — | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/shared-all/js/sso-footer.js | 2 KB | — | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/shared-all/js/medscape/medscape-site.js | 4 KB | — | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/promo/js/invites-layer.js | 1 KB | — | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/common/js/global/medscape-library.js | 14 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/2c8c1e17b98c/017edbc80c83/launch-88df53f8d9c8.min.js | 60 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (224 KB)PASS
Web fonts
6
224 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 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
AHTTP Cachingmax-age=3600 (1 hour)PASS
max-age=3600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 3600 | Cache for 1 hour |
Network Waterfall124 requests over 1735msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 537ms | 0 KB | — | $7/mo | Costly |
www.medscape.com www.medscape.com | Other | 360ms | 47 KB | — | $5/mo | Costly |
img.medscapestatic.com img.medscapestatic.com | Other | 358ms | 36 KB | — | $5/mo | Costly |
surveys-static-prd.survicate-cdn.com surveys-static-prd.survicate-cdn.com | Other | 348ms | 161 KB | 48% | $5/mo | Costly |
www.medscape.com www.medscape.com | Other | 257ms | 0 KB | — | $3/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 210ms | 60 KB | — | $3/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 192ms | 188 KB | 75% | $3/mo | Optional |
img.medscapestatic.com img.medscapestatic.com | Other | 141ms | 86 KB | 47% | $2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 100ms | 34 KB | — | $1/mo | Optional |
img.medscapestatic.com img.medscapestatic.com | Other | 97ms | 53 KB | 58% | $1/mo | Optional |
img.medscapestatic.com img.medscapestatic.com | Other | 82ms | 34 KB | — | $1/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 75ms | 31 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 537ms and costs ~$7/month
- www.medscape.com adds 360ms and costs ~$5/month
- img.medscapestatic.com adds 358ms and costs ~$5/month
- surveys-static-prd.survicate-cdn.com adds 348ms and costs ~$5/month
- www.medscape.com adds 257ms and costs ~$3/month
- assets.adobedtm.com adds 210ms 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
Unattributable takes 537ms 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.medscape.com 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
img.medscapestatic.com takes 358ms 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
surveys-static-prd.survicate-cdn.com takes 348ms 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.medscape.com takes 257ms 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
assets.adobedtm.com takes 210ms 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
75% 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
58% of img.medscapestatic.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