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.
1.14 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.63 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
110 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.218
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.10 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.
4.22 s
Page Load Progression
FPage Weight BudgetAction3.6 MB transferred, 142 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 BundlesAction24 scripts, 348 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964 | 188 KB | 141 KB (75%) | ✓ | 3rd |
| https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js | 161 KB | 77 KB (48%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 124 KB | 58 KB (47%) | ✓ | 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://securepubads.g.doubleclick.net/tag/js/gpt.js | 34 KB | — | ✓ | 3rd |
| https://cdn.mouseflow.com/projects/766bdc67-82c4-445a-9a95-1d209d0510f6.js | 18 KB | — | ✓ | 3rd |
| https://img.medscapestatic.com/medscape-core/shared-all/js/cp/cp.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
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
DPage Weight InventoryAction142 resources · 3.6 MB · 348 KB savings availableFIX
~347.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 142 resources | 3.6 MiB | ||||||
CImage OptimizationAction86 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
BJS Execution Cost986ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.medscape.com/ | 252ms | 19ms | 5ms | 3rd |
| Unattributable | 179ms | 6ms | 0ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otTCF.js | 123ms | 103ms | 2ms | 3rd |
| https://img.medscapestatic.com/medscape-core/common/js/global/medscape-script/all-scripts-no-defer.js | 89ms | 57ms | 2ms | 3rd |
| https://assets.adobedtm.com/2c8c1e17b98c/017edbc80c83/launch-88df53f8d9c8.min.js | 88ms | 80ms | 6ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 74ms | 45ms | 9ms | 3rd |
| https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js | 68ms | 54ms | 12ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964 | 59ms | 44ms | 12ms | 3rd |
| https://www.medscape.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 54ms | 51ms | 1ms | 3rd |
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+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 Waterfall142 requests over 1686msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.medscape.com www.medscape.com | Other | 252ms | 46 KB | — | $3/mo | Costly |
Unattributable Unattributable | Other | 179ms | 0 KB | — | $2/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 123ms | 18 KB | — | $2/mo | Essential |
img.medscapestatic.com img.medscapestatic.com | Other | 89ms | 36 KB | — | $1/mo | Optional |
assets.adobedtm.com assets.adobedtm.com | Other | 88ms | 60 KB | — | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 74ms | 124 KB | 47% | $1/mo | Essential |
surveys-static-prd.survicate-cdn.com surveys-static-prd.survicate-cdn.com | Other | 68ms | 161 KB | 48% | $1/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 59ms | 188 KB | 75% | $1/mo | Optional |
www.medscape.com www.medscape.com | Other | 54ms | 0 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.medscape.com adds 252ms 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
www.medscape.com takes 252ms 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