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.
3.17 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.10 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
217 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.120
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.96 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.
6.38 s
Page Load Progression
FPage Weight BudgetAction22.6 MB transferred, 116 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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
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
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization36 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
CJS Execution CostAction1850ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 613ms | 7ms | 0ms | 3rd |
| https://kit.fontawesome.com/6b94619235.js | 462ms | 442ms | 1ms | 3rd |
| https://lsu.edu/ | 410ms | 13ms | 1ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-LKQWZFFFYP&cx=c>m=4e64k0h2 | 133ms | 110ms | 20ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5FR2GLX | 92ms | 74ms | 16ms | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 81ms | 69ms | 6ms | 3rd |
| https://lsu.edu/_resources/js/jquery.js | 60ms | 44ms | 10ms | 1st |
CJS BundlesAction25 scripts, 267 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-5FR2GLX | 156 KB | 71 KB (46%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-LKQWZFFFYP&cx=c>m=4e64k0h2 | 174 KB | 61 KB (35%) | ✓ | 3rd |
| https://lsu.edu/_resources/js/jquery.js | 86 KB | 41 KB (49%) | ✓ | 1st |
| https://lsu.edu/_resources_fierce/js/slick.min.js | 42 KB | 39 KB (94%) | ✓ | 1st |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 55 KB | 28 KB (51%) | ✓ | 3rd |
| https://platform-api.sharethis.com/js/sharethis.js | 47 KB | 26 KB (56%) | ✗ | 3rd |
| https://buttons-config.sharethis.com/js/5b0d65b460e2e90011e287db.js | 1 KB | — | ✓ | 3rd |
| https://script.crazyegg.com/pages/scripts/0127/0244.js | 3 KB | — | ✓ | 3rd |
| https://lsu.edu/_resources_fierce/js/lsu.js?v=3.9 | 15 KB | — | ✗ | 1st |
| https://calendar.lsu.edu/widget/view?schools=lsu&types=132837&days=31&num=5&container=localist-widget-94794086&template=lsu-card | 30 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
CPage Weight InventoryAction116 resources · 22.6 MB · 267 KB savings availableREVIEW
~267.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 116 resources | 22.6 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party Impact14% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading12 fonts (333 KB)PASS
Web fonts
12
333 KB total
Render-blocking
0
of 12
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 Waterfall116 requests over 7287msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 613ms | 0 KB | — | $8/mo | Costly |
kit.fontawesome.com kit.fontawesome.com | Other | 462ms | 6 KB | — | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 133ms | 174 KB | 35% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 92ms | 156 KB | 46% | $1/mo | Optional |
script.crazyegg.com script.crazyegg.com | Other | 81ms | 55 KB | 51% | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 613ms and costs ~$8/month
- kit.fontawesome.com adds 462ms and costs ~$6/month
75% 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 613ms 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
kit.fontawesome.com takes 462ms 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
51% of script.crazyegg.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