Skip to content
https://www.visualstudio.com

Performance

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

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

Mobile Desktop
44
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.

9.49 s

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

26.86 s

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

463 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.

12.68 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.

27.02 s

Page Load Progression

663 ms
1.3 s
2.0 s
2.7 s
3.3 s
4.0 s
4.6 s
5.3 s
Checks
14
5 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
7.1 MB transferred, 102 requests
FIX
7.1 MB transferred, 102 requests
Critical::
Page weighs 9.2 MB (7.1 MB transferred)
Warning::
Images are 2.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.5 MB
Warning::
JavaScript is 1022 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1022 KB
Warning::
102 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
102 requests
1.5 g CO2 per page load
Other 3.1 MiB 44%
Images 2.5 MiB 36%
JavaScript 1022.5 KiB 14%
Fonts 197.8 KiB 3%
CSS 164.8 KiB 2%
HTML 68.4 KiB 1%
Other 18.9 KiB 0%
Other 3.2 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
JS Execution Cost
Action
4558ms total JS execution
FIX
4558ms total JS execution
Warning::
https://visualstudio.microsoft.com/wp-content/uplo...: 1360ms CPU time
Warning::
Unattributable: 899ms CPU time
Warning::
https://visualstudio.microsoft.com/: 665ms CPU time
Warning::
https://visualstudio.microsoft.com/wp-content/plug...: 268ms CPU time
Info::
https://scripts.clarity.ms/0.8.59/clarity.js: 241ms CPU time
Warning::
Third-party scripts: 4558ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 29% Style & Layout 16% Script Parsing & Compilation 8% Rendering 6% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://visualstudio.microsoft.com/wp-content/uploads/fusion-scripts/c75bede5d1d99a50d805f72c5e34a73e.min.js?ver=3.14.21360ms299ms81ms3rd
Unattributable899ms11ms0ms3rd
https://visualstudio.microsoft.com/665ms200ms44ms3rd
https://visualstudio.microsoft.com/wp-content/plugins/vscom-core/assets/js/vscom.min.js?1766099541268ms157ms2ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js241ms206ms11ms3rd
https://visualstudio.microsoft.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1238ms180ms11ms3rd
https://mktdplp102cdn.azureedge.net/public/latest/js/form-loader.js?v=1.60.1066.0176ms59ms46ms3rd
https://mem.gfx.ms/scripts/me/MeControl/10.25136.1/en-US/meBoot.min.js167ms116ms41ms3rd
https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js131ms43ms85ms3rd
https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.js130ms88ms28ms3rd

Showing top 10 of 14 scripts

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
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
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://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.
20 images 2.5 MB
0 oversized -0 KB
7 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 Bundles
Action
18 scripts, 278 KB unused
REVIEW
18 scripts, 278 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://mktdplp102cdn.azureedge.net/public/latest/...: 116 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.microsoft.com/onerfstatics/marketingsi...: 26 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 278 KB
278 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://mktdplp102cdn.azureedge.net/public/latest/js/form-loader.js?v=1.60.1066.0281 KB116 KB (43%)✓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 (73%)✓3rd
https://visualstudio.microsoft.com/wp-content/plugins/vscom-dom-ready-js/js/vscomDomReady.min.js?ver=16674981941 KB—✓3rd
https://www.clarity.ms/tag/jmjgcz3l72?ref=wordpress1 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://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.js60 KB—✓3rd
https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js274 KB—✓3rd
https://mem.gfx.ms/meversion?partner=VisualStudio&market=en-us&uhf=110 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

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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s FCP 9.5 s LCP 26.9 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://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/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://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/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
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
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
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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
2
preload
1
dns-prefetch
—
prefetch
—

3 resource hints configured

Network Waterfall
102 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 4558ms · 1120KB · $26/mo
visualstudio.microsoft.com
Other
Costly
Execution 1360ms
Transfer 173 KB
Unused 79%
Monthly Cost $8/mo
Unattributable
Other
Costly
Execution 899ms
Transfer 0 KB
Monthly Cost $5/mo
visualstudio.microsoft.com
Other
Costly
Execution 665ms
Transfer 56 KB
Monthly Cost $4/mo
visualstudio.microsoft.com
Other
Costly
Execution 268ms
Transfer 6 KB
Monthly Cost $2/mo
Microsoft Clarity
Session Replay
Costly
Execution 241ms
Transfer 26 KB
Monthly Cost $1/mo
visualstudio.microsoft.com
Other
Costly
Execution 238ms
Transfer 31 KB
Monthly Cost $1/mo
mktdplp102cdn.azureedge.net
Other
Optional
Execution 176ms
Transfer 281 KB
Unused 43%
Monthly Cost $1/mo
mem.gfx.ms
Other
Optional
Execution 167ms
Transfer 61 KB
Monthly Cost $1/mo
wcpstatic.microsoft.com
Other
Optional
Execution 131ms
Transfer 274 KB
Monthly Cost $1/mo
js.monitor.azure.com
Other
Optional
Execution 130ms
Transfer 60 KB
Monthly Cost $1/mo
www.microsoft.com
Other
Optional
Execution 97ms
Transfer 37 KB
Unused 73%
Monthly Cost $1/mo
mem.gfx.ms
Other
Optional
Execution 70ms
Transfer 10 KB
Monthly Cost $0/mo
mem.gfx.ms
Other
Optional
Execution 64ms
Transfer 16 KB
Monthly Cost $0/mo
visualstudio.microsoft.com
Other
Optional
Execution 50ms
Transfer 90 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • visualstudio.microsoft.com adds 1360ms and costs ~$8/month
  • Unattributable adds 899ms and costs ~$5/month
  • visualstudio.microsoft.com adds 665ms and costs ~$4/month
  • visualstudio.microsoft.com adds 268ms and costs ~$2/month
  • Microsoft Clarity adds 241ms and costs ~$1/month
  • visualstudio.microsoft.com adds 238ms 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 1360ms 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 899ms 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 665ms 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 268ms 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

Microsoft Clarity takes 241ms 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 238ms 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

73% of www.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

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.

Send Feedback