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.
1.01 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.85 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.01 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.
2.03 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 sDPage Weight BudgetAction2.5 MB transferred, 43 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction43 resources · 2.5 MB · 44 KB savings availableFIX
~43.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 43 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization29 images, 0 KB saveableREVIEW
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 Cost389ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://teams.live.com/free?source=skype | 204ms | 7ms | 0ms | 3rd |
| Unattributable | 96ms | 2ms | 0ms | 3rd |
| https://statics.teams.cdn.live.net/teams-modular-packages/hashed-assets/688-aefeb25c1246ebc0.js | 89ms | 80ms | 2ms | 3rd |
A+Font LoadingNo web fonts (system fonts)PASS
A+JS Bundles5 scripts, 44 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://statics.teams.cdn.live.net/teams-modular-packages/hashed-assets/688-aefeb25c1246ebc0.js | 33 KB | 24 KB (74%) | ✓ | 3rd |
| https://statics.teams.cdn.live.net/teams-modular-packages/hashed-assets/661-edceffffc9127949.js | 60 KB | 20 KB (34%) | ✓ | 3rd |
| https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js | 274 KB | — | ✓ | 3rd |
| https://statics.teams.cdn.live.net/teams-modular-packages/hashed-assets/unauth-fbe3727c016f3dea.js | 7 KB | — | ✓ | 3rd |
| https://statics.teams.cdn.live.net/teams-modular-packages/hashed-assets/authCallback-0e93e6e8e0459ec7.js | 5 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
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall43 requests over 3636msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
teams.live.com teams.live.com | Other | 204ms | 14 KB | — | $3/mo | Costly |
Unattributable Unattributable | Other | 96ms | 0 KB | — | $1/mo | Optional |
statics.teams.cdn.live.net statics.teams.cdn.live.net | Other | 89ms | 33 KB | 74% | $1/mo | Optional |
These scripts may cost more than they're worth
- teams.live.com adds 204ms 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
teams.live.com takes 204ms 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
74% of statics.teams.cdn.live.net'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