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.
3.79 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.16 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
65 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.274
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.37 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.
11.03 s
Page Load Progression
FPage Weight BudgetAction2.7 MB transferred, 88 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
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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2412ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ufl.edu/ | 747ms | 15ms | 5ms | 3rd |
| https://www.ufl.edu/wp-content/themes/ufl-theme/assets/js/simpleParallax.min.js?ver=6.8 | 579ms | 136ms | 1ms | 3rd |
| https://www.ufl.edu/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 540ms | 261ms | 13ms | 3rd |
| Unattributable | 454ms | 8ms | 0ms | 3rd |
| https://www.ufl.edu/wp-content/themes/ufl-theme/assets/js/jquery-ui.js?ver=6.8 | 91ms | 40ms | 50ms | 3rd |
DPage Weight InventoryAction88 resources · 2.7 MB · 104 KB savings availableFIX
~104.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 88 resources | 2.7 MiB | ||||||
BImage Optimization30 images, 0 KB saveableREVIEW
BJS Bundles21 scripts, 104 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.ufl.edu/wp-content/themes/ufl-theme/assets/js/jquery-ui.js?ver=6.8 | 124 KB | 104 KB (84%) | ✗ | 3rd |
| https://www.ufl.edu/wp-content/uploads/sites/5/visualcomposer-assets/addons/popupBuilder/popupBuilder/public/dist/popup.bundle.js?ver=0-4296 | 1 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/plugins/visualcomposer/public/dist/runtime.bundle.js?ver=45.15.0 | 4 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/plugins/visualcomposer/public/dist/front.bundle.js?ver=45.15.0 | 2 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/plugins/visualcomposer/public/sources/assetsLibrary/lazyLoad/dist/lazyLoad.bundle.js?ver=45.15.0-4296 | 2 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/plugins/visualcomposer/public/sources/assetsLibrary/fullWidth/dist/fullWidth.bundle.js?ver=45.15.0-4296 | 1 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/uploads/sites/5/visualcomposer-assets/elements/basicMenu/basicMenu/public/dist/basicMenu.min.js?ver=0-4296 | 1 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/plugins/visualcomposer/public/sources/assetsLibrary/menuToggle/dist/menuToggle.bundle.js?ver=45.15.0-4296 | 1 KB | — | ✓ | 3rd |
| https://www.ufl.edu/wp-content/plugins/visualcomposer/public/sources/assetsLibrary/waypoints/dist/noframework.waypoints.min.js?ver=45.15.0-28 | 3 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingmax-age=0REVIEW
max-age=0
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading9 fonts (822 KB)PASS
Web fonts
9
822 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~563 KB and ~1126 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints8 hints, 0 missing preconnectsPASS
Current Resource Hints
8 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall88 requests over 2891msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ufl.edu www.ufl.edu | Other | 747ms | 53 KB | — | $10/mo | Costly |
www.ufl.edu www.ufl.edu | Other | 579ms | 3 KB | — | $8/mo | Costly |
www.ufl.edu www.ufl.edu | Other | 540ms | 30 KB | — | $7/mo | Costly |
Unattributable Unattributable | Other | 454ms | 0 KB | — | $6/mo | Costly |
www.ufl.edu www.ufl.edu | Other | 91ms | 124 KB | 84% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.ufl.edu adds 747ms and costs ~$10/month
- www.ufl.edu adds 579ms and costs ~$8/month
- www.ufl.edu adds 540ms and costs ~$7/month
- Unattributable adds 454ms and costs ~$6/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.ufl.edu takes 747ms 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.ufl.edu takes 579ms 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.ufl.edu takes 540ms 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 454ms 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
84% of www.ufl.edu'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