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.
933 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.35 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
11 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.057
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.97 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.
8.41 s
Page Load Progression
FPage Weight BudgetAction14.7 MB transferred, 134 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
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
DPage Weight InventoryAction134 resources · 14.7 MB · 113 KB savings availableFIX
~112.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 134 resources | 14.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction24 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
BJS Execution Cost946ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ssrn.com/ssrn/ | 269ms | 1ms | 1ms | 3rd |
| https://www.ssrn.com/_next/static/chunks/117-178354e50e9d31d2.js | 261ms | 151ms | 2ms | 3rd |
| Unattributable | 174ms | 36ms | 0ms | 3rd |
| https://cdn.ssrn.com/ssrn-header-widget/static/js/main.js | 117ms | 78ms | 13ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js | 71ms | 40ms | 11ms | 3rd |
| https://www.ssrn.com/_next/static/chunks/fd9d1056-4917a1c645b02215.js | 54ms | 31ms | 5ms | 3rd |
BJS Bundles14 scripts, 113 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js | 119 KB | 63 KB (53%) | ✓ | 3rd |
| https://cdn.ssrn.com/ssrn-header-widget/static/js/main.js | 143 KB | 50 KB (35%) | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/142-59b58a8ccf274b9a.js | 45 KB | — | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/fd9d1056-4917a1c645b02215.js | 53 KB | — | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/117-178354e50e9d31d2.js | 31 KB | — | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/main-app-74e1b89d688e8afd.js | 0 KB | — | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/otSDKStub.js | 9 KB | — | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/667-6e8a9aee61851cfd.js | 3 KB | — | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/app/layout-c4655cd09d65bda4.js | 9 KB | — | ✓ | 3rd |
| https://www.ssrn.com/_next/static/chunks/270-4917c068f98cd316.js | 25 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
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 Loading3 fonts (108 KB)PASS
Web fonts
3
108 KB total
Render-blocking
0
of 3
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
Network Waterfall134 requests over 2931msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ssrn.com www.ssrn.com | Other | 269ms | 70 KB | — | $4/mo | Costly |
www.ssrn.com www.ssrn.com | Other | 261ms | 31 KB | — | $3/mo | Costly |
Unattributable Unattributable | Other | 174ms | 0 KB | — | $2/mo | Optional |
cdn.ssrn.com cdn.ssrn.com | Other | 117ms | 143 KB | 35% | $2/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 71ms | 119 KB | 53% | $1/mo | Essential |
www.ssrn.com www.ssrn.com | Other | 54ms | 53 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.ssrn.com adds 269ms and costs ~$4/month
- www.ssrn.com adds 261ms 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.ssrn.com takes 269ms 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.ssrn.com takes 261ms 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