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.
1.16 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.98 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
21 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.032
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.20 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.
2.18 s
Page Load Progression
375 ms
750 ms
1.1 s 1.5 s 1.9 s 2.2 s 2.6 s
3.0 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction57 resources · 1.5 MB · 82 KB savings availableFIX
~82.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 57 resources | 1.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.5 MB transferred, 57 requestsREVIEW
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
BImage Optimization27 images, 0 KB saveableREVIEW
BJS Bundles11 scripts, 82 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://gtm-tagging-1.mtu.edu/gtm.js?id=GTM-K6W7S4L9 | 169 KB | 59 KB (35%) | ✓ | 3rd |
| https://www.mtu.edu/mtu_resources/assets/js/app.js | 37 KB | 23 KB (62%) | ✗ | 3rd |
| https://www.mtu.edu/_assets/compiled/program-search/index.js | 7 KB | — | ✓ | 3rd |
| https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js | 31 KB | — | ✓ | 3rd |
| https://www.mtu.edu/mtu_resources/script/n/ieWarn.js | 1 KB | — | ✓ | 3rd |
| https://www.mtu.edu/_resources/js/ug-hidden-inline-rfi.js | 4 KB | — | ✓ | 3rd |
| https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.js | 23 KB | — | ✓ | 3rd |
| https://gtm-tagging-1.mtu.edu/gtag/js?id=G-4700E3SK7B&cx=c>m=4e64k0&sign=94047269401b534baa58b0e8938315a3d65a7afd9e1d2665fc40e9380b08832f_20260422 | 0 KB | — | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K6W7S4L9>g_health=1 | 0 KB | — | ✓ | 3rd |
| https://go.mtu.edu/ping | 0 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+JS Execution Cost444ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.mtu.edu/ | 163ms | 4ms | 1ms | 3rd |
| https://gtm-tagging-1.mtu.edu/gtag/js?id=G-4700E3SK7B&cx=c>m=4e64k0&sign=94047269401b534baa58b0e8938315a3d65a7afd9e1d2665fc40e9380b08832f_20260422 | 132ms | 110ms | 13ms | 3rd |
| Unattributable | 79ms | 4ms | 0ms | 3rd |
| https://gtm-tagging-1.mtu.edu/gtm.js?id=GTM-K6W7S4L9 | 69ms | 57ms | 10ms | 3rd |
A+Font Loading2 fonts (86 KB)PASS
Web fonts
2
86 KB total
Render-blocking
0
of 2
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 Waterfall57 requests over 5252msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.mtu.edu www.mtu.edu | Other | 163ms | 22 KB | — | $2/mo | Optional |
gtm-tagging-1.mtu.edu gtm-tagging-1.mtu.edu | Other | 132ms | 0 KB | — | $2/mo | Optional |
Unattributable Unattributable | Other | 79ms | 0 KB | — | $1/mo | Optional |
gtm-tagging-1.mtu.edu gtm-tagging-1.mtu.edu | Other | 69ms | 169 KB | 35% | $1/mo | Optional |
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