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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
3
REVIEW
4
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
74
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.20 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.67 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 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.

2.02 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.

4.01 s

Page Load Progression

582 ms
1.2 s
1.7 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
14
5 PASS 4 REVIEW 3 FIX
F
Page Weight Budget
Action
7.1 MB transferred, 105 requests
FIX
7.1 MB transferred, 105 requests
Critical::
Page weighs 9.2 MB (7.1 MB transferred)
Warning::
Images are 2.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.6 MB
Warning::
JavaScript is 741 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 741 KB
Warning::
105 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.5 g CO2 per page load
7.1 MB / 2.4 MB budget
7.1 MB transferred
105 requests
1.5 g CO2 per page load
Other 3.4 MiB 48%
Images 2.6 MiB 36%
JavaScript 741.4 KiB 10%
Fonts 197.8 KiB 3%
CSS 164.8 KiB 2%
HTML 64.6 KiB 1%
Other 3.1 KiB 0%
Other 2.0 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

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.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (7.1 MiB of 7.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://uhf.microsoft.com/images/microsoft/RE1Mu3b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://visualstudio.microsoft.com/wp-content/uplo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://visualstudio.microsoft.com/wp-content/uplo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://visualstudio.microsoft.com/wp-content/uplo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://visualstudio.microsoft.com/wp-content/uplo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://visualstudio.microsoft.com/wp-content/uplo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://visualstudio.microsoft.com/wp-content/uplo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 2.6 MB
0 oversized -0 KB
8 legacy format
7 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1018ms total JS execution
REVIEW
1018ms total JS execution
Warning::
https://visualstudio.microsoft.com/: 317ms CPU time
Info::
https://visualstudio.microsoft.com/wp-content/uplo...: 245ms CPU time
Info::
Unattributable: 211ms CPU time
Info::
https://visualstudio.microsoft.com/wp-includes/js/...: 98ms CPU time
Info::
https://scripts.clarity.ms/0.8.59/clarity.js: 75ms CPU time
Warning::
Third-party scripts: 1018ms (100% of total)

Main Thread Breakdown

Script Evaluation 38% Other 28% Style & Layout 17% Script Parsing & Compilation 8% Parse HTML & CSS 4% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://visualstudio.microsoft.com/317ms73ms11ms3rd
https://visualstudio.microsoft.com/wp-content/uploads/fusion-scripts/c75bede5d1d99a50d805f72c5e34a73e.min.js?ver=3.14.2245ms70ms25ms3rd
Unattributable211ms4ms0ms3rd
https://visualstudio.microsoft.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.198ms69ms3ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js75ms59ms3ms3rd
https://mem.gfx.ms/scripts/me/MeControl/10.25136.1/en-US/meBoot.min.js73ms61ms9ms3rd
C
JS Bundles
Action
17 scripts, 161 KB unused
REVIEW
17 scripts, 161 KB unused
Warning::
https://visualstudio.microsoft.com/wp-content/uplo...: 135 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.microsoft.com/onerfstatics/marketingsi...: 26 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 161 KB
161 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://visualstudio.microsoft.com/wp-content/uploads/fusion-scripts/c75bede5d1d99a50d805f72c5e34a73e.min.js?ver=3.14.2173 KB135 KB (79%)✓3rd
https://www.microsoft.com/onerfstatics/marketingsites-neu-prod/shell/_scrf/js/themes=default/54-af9f9f/fb-2be034/21-f9d187/b0-50721e/d8-97d509/40-0bd7f9/ea-f1669e/9d-c6ea39/62-a72447/3e-a4ee50/7c-0bd6a1/60-37309a/db-bc0148/dc-7e9864/6d-c07ea1/6f-dafe8c/f6-aa5278/e6-5f3533/6d-1e7ed0/b7-cadaa7/62-2741f0/ca-40b7b0/4e-ee3a55/3e-f5c39b/c3-6454d7/f9-7592d3/d0-e64f3e/92-10345d/79-499886/7e-cda2d3/e7-1fe854/66-9d711a/38-b93a9e/de-884374/1f-100dea/33-abe4df/8f-61bee0?ver=2.0&_cf=02242021_3231&iife=137 KB26 KB (72%)✓3rd
https://visualstudio.microsoft.com/wp-content/plugins/vscom-dom-ready-js/js/vscomDomReady.min.js?ver=16674981941 KB—✓3rd
https://mem.gfx.ms/meversion?partner=VisualStudio&market=en-us&uhf=110 KB—✓3rd
https://visualstudio.microsoft.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.131 KB—✓3rd
https://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/assets/js/common.min.js?17664290382 KB—✓3rd
https://visualstudio.microsoft.com/wp-content/plugins/vscom-fusion-extension/js/dropdown-menu.min.js?ver=6.9.12 KB—✓3rd
https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js274 KB—✓3rd
https://visualstudio.microsoft.com/wp-content/plugins/vscom-utility-plugin/js/utility.min.js?ver=16757954841 KB—✓3rd
https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.js60 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
7 fonts (198 KB)
PASS
7 fonts (198 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

198 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.2 s LCP 3.7 shttps://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/fonts/segoeui-regular.woff2segoeui-regular.woff2 https://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/fonts/segoeui-regular.woff2 — 36.3 KiB — 0 ms — font-display: swaphttps://visualstudio.microsoft.com/wp-content/uploads/2025/09/segoeui-regular.woff2segoeui-regular.woff2 https://visualstudio.microsoft.com/wp-content/uploads/2025/09/segoeui-regular.woff2 — 36.3 KiB — 0 ms — font-display: swaphttps://visualstudio.microsoft.com/wp-content/uploads/2025/09/segoeui-semibold.woff2segoeui-semibold.woff2 https://visualstudio.microsoft.com/wp-content/uploads/2025/09/segoeui-semibold.woff2 — 31.9 KiB — 0 ms — font-display: swaphttps://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/fonts/segoeui-semibold.woff2segoeui-semibold.woff2 https://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/fonts/segoeui-semibold.woff2 — 31.8 KiB — 0 ms — font-display: swaphttps://www.microsoft.com/mwf/_h/v3.54/mwf.app/fonts/mwfmdl2-v3.54.woffmwfmdl2-v3.54.woff https://www.microsoft.com/mwf/_h/v3.54/mwf.app/fonts/mwfmdl2-v3.54.woff — 26.4 KiB — 0 ms — font-display: swaphttps://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/fonts/icons/vscom.ttfvscom.ttf https://visualstudio.microsoft.com/wp-content/themes/Avada-Child-Theme/fonts/icons/vscom.ttf — 1.7 KiB — 0 ms — font-display: swaphttps://c.s-microsoft.com/static/fonts/segoe-ui/west-european/normal/latest.woff2latest.woff2 https://c.s-microsoft.com/static/fonts/segoe-ui/west-european/normal/latest.woff2 — 33.5 KiB — 0 ms — font-display: swap
segoeui-regular.woff2 woff2 swap
Size 36 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
segoeui-regular.woff2 woff2 swap
Size 36 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
segoeui-semibold.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
segoeui-semibold.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
mwfmdl2-v3.54.woff woff swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
vscom.ttf ttf swap
Size 2 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
latest.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
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 ~8 KB and ~16 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
105 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1018ms · 347KB · $6/mo
visualstudio.microsoft.com
Other
Costly
Execution 317ms
Transfer 56 KB
Monthly Cost $2/mo
visualstudio.microsoft.com
Other
Costly
Execution 245ms
Transfer 173 KB
Unused 79%
Monthly Cost $1/mo
Unattributable
Other
Costly
Execution 211ms
Transfer 0 KB
Monthly Cost $1/mo
visualstudio.microsoft.com
Other
Optional
Execution 98ms
Transfer 31 KB
Monthly Cost $1/mo
Microsoft Clarity
Session Replay
Optional
Execution 75ms
Transfer 26 KB
Monthly Cost $0/mo
mem.gfx.ms
Other
Optional
Execution 73ms
Transfer 61 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • visualstudio.microsoft.com adds 317ms and costs ~$2/month
  • visualstudio.microsoft.com adds 245ms and costs ~$1/month
  • Unattributable adds 211ms and costs ~$1/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

visualstudio.microsoft.com takes 317ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

visualstudio.microsoft.com takes 245ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

79% of visualstudio.microsoft.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Unattributable takes 211ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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