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.
1.55 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.12 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
794 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.002
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
4.21 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.
7.72 s
Page Load Progression
FPage Weight BudgetAction11.5 MB transferred, 186 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
DJS Execution CostAction2939ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://widget.tagembed.com/widget/static/js/6651.cd87534151bbdf7909e0.chunk.js?v=202604221910 | 1829ms | 79ms | 1ms | 3rd |
| https://widget.tagembed.com/widget/static/js/main.cc9bc473309cd77d5eca.js | 342ms | 268ms | 6ms | 3rd |
| Unattributable | 307ms | 2ms | 0ms | 3rd |
| https://auburn.edu/ | 205ms | 2ms | 1ms | 1st |
| https://cdn.jsdelivr.net/npm/hls.js@1.1.4/dist/hls.min.js | 110ms | 87ms | 6ms | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 85ms | 74ms | 5ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-S96V7Q8DMB | 61ms | 50ms | 9ms | 3rd |
DJS BundlesAction40 scripts, 305 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-S96V7Q8DMB | 160 KB | 63 KB (39%) | ✓ | 3rd |
| https://auburn.edu/template/2024/_assets/js/bootstrap.bundle.min.js | 77 KB | 60 KB (79%) | ✓ | 1st |
| https://cdn.jsdelivr.net/npm/hls.js@1.1.4/dist/hls.min.js | 94 KB | 55 KB (58%) | ✓ | 3rd |
| https://widget.tagembed.com/widget/static/js/main.cc9bc473309cd77d5eca.js | 112 KB | 46 KB (41%) | ✓ | 3rd |
| https://widget.tagembed.com/widget/static/js/4079.8bf5861f57259a77378a.chunk.js?v=202604221910 | 33 KB | 31 KB (94%) | ✓ | 3rd |
| https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js | 55 KB | 27 KB (50%) | ✓ | 3rd |
| https://widget.tagembed.com/widget/static/js/2466.371f9305226a68c982dc.chunk.js?v=202604221910 | 78 KB | 23 KB (29%) | ✓ | 3rd |
| https://widget.tagembed.com/widget/static/js/3556.84de982d08df740ca411.chunk.js?v=202604221910 | 15 KB | — | ✓ | 3rd |
| https://widget.tagembed.com/widget/static/js/8740.2aaf2e4782323c86198e.chunk.js?v=202604221910 | 11 KB | — | ✓ | 3rd |
| https://script.crazyegg.com/pages/scripts/0119/6328.js | 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
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 InventoryAction186 resources · 11.5 MB · 305 KB savings availableFIX
~304.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 186 resources | 11.5 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
max-age=0, no-cache, no-store, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| must-revalidate | — | Must recheck with server after expiry |
BThird-Party Impact53% third-party, 0 ms blockingREVIEW
CImage OptimizationAction74 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
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 Loading15 fonts (597 KB)PASS
Web fonts
15
597 KB total
Render-blocking
0
of 15
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
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 ~71 KB and ~142 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall186 requests over 6056msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
widget.tagembed.com widget.tagembed.com | Other | 1829ms | 8 KB | — | $24/mo | Costly |
widget.tagembed.com widget.tagembed.com | Other | 342ms | 112 KB | 41% | $5/mo | Costly |
Unattributable Unattributable | Other | 307ms | 0 KB | — | $4/mo | Costly |
jsDelivr cdn.jsdelivr.net | CDN | 110ms | 94 KB | 58% | $1/mo | Optional |
script.crazyegg.com script.crazyegg.com | Other | 85ms | 55 KB | 50% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 61ms | 160 KB | 39% | $1/mo | Optional |
These scripts may cost more than they're worth
- widget.tagembed.com adds 1829ms and costs ~$24/month
- widget.tagembed.com adds 342ms and costs ~$5/month
- Unattributable adds 307ms and costs ~$4/month
93% 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
widget.tagembed.com takes 1829ms 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
widget.tagembed.com takes 342ms 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 307ms 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
58% of jsDelivr'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