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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
3
REVIEW
5
PASS
5
INFO
2

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

Mobile Desktop
65
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

2.69 s

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

3.36 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.

0.057

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.04 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.

3.36 s

Page Load Progression

455 ms
910 ms
1.4 s
1.8 s
2.3 s
2.7 s
3.2 s
3.6 s
Checks
15
5 PASS 5 REVIEW 3 FIX
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 (1.5 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
40 resources · 1.5 MB · 99 KB savings available
FIX
40 resources · 1.5 MB · 99 KB savings available
Warning::
Page weight 489 KB over 1MB target
Got: 1.5 MB Expected: ≤ 1 MB
Info::
~99 KB of savings available
Warning::
39 third-party resources (100% of weight)
Info::
2 resources over 200KB
40 resources · 1.5 MiB · 39 third-party 489.3 KiB over 1MB target
JavaScript 35% · 525.2 KiB
Font 24% · 370.4 KiB
CSS 19% · 285.1 KiB
Image 16% · 239.0 KiB
Document 6% · 90.2 KiB
Other 0% · 3.3 KiB

~99.4 KiB of savings available

Remove unused JavaScript: 99.4 KiB
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.

B
Page Weight Budget
1.5 MB transferred, 40 requests
REVIEW
1.5 MB transferred, 40 requests
Info::
Page weighs 2.4 MB (1.5 MB transferred)
Warning::
JavaScript is 525 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 525 KB
Info::
Fonts are 332 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 332 KB
Info::
CSS is 285 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 285 KB
Info::
40 HTTP requests
Info::
Estimated 0.31 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
40 requests
0.31 g CO2 per page load
JavaScript 525.2 KiB 35%
Fonts 331.7 KiB 22%
CSS 285.1 KiB 19%
Other 201.9 KiB 13%
HTML 89.8 KiB 6%
Images 76.4 KiB 5%
Other 2.1 KiB 0%
Other 1.1 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

B
Image Optimization
3 images, 0 KB saveable
REVIEW
3 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.
3 images 76 KB
0 oversized -0 KB
3 legacy format
1 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

B
JS Execution Cost
536ms total JS execution
REVIEW
536ms total JS execution
Info::
https://dotnet.microsoft.com/en-us/apps/aspnet: 124ms CPU time
Info::
Unattributable: 118ms CPU time
Info::
https://dotnet.microsoft.com/static/js/main.min.js...: 93ms CPU time
Info::
https://js.monitor.azure.com/scripts/b/ai.3.min.js: 72ms CPU time
Info::
https://uhf.microsoft.com/statics/20260421.16.02/j...: 71ms CPU time
Warning::
Third-party scripts: 536ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Other 23% Style & Layout 15% Parse HTML & CSS 6% Script Parsing & Compilation 6% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://dotnet.microsoft.com/en-us/apps/aspnet124ms6ms1ms3rd
Unattributable118ms10ms0ms3rd
https://dotnet.microsoft.com/static/js/main.min.js?v=6VTgZMA9byKuNVNnUSMA8SzBB9MuqRoJlNVCooNxlu493ms80ms1ms3rd
https://js.monitor.azure.com/scripts/b/ai.3.min.js72ms57ms7ms3rd
https://uhf.microsoft.com/statics/20260421.16.02/js/index-Cifsy-6O.js71ms46ms0ms3rd
https://dotnet.microsoft.com/static/js/cookie-consent.min.js?v=cPwRYK_KXC_97Lbz_R3EFgGKqN3we23dMoCDF5iaWgQ58ms57ms0ms3rd
B
JS Bundles
12 scripts, 99 KB unused
REVIEW
12 scripts, 99 KB unused
Warning::
https://dotnet.microsoft.com/static/js/general.min...: 51 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.monitor.azure.com/scripts/b/ai.3.min.js: 28 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.monitor.azure.com/scripts/c/ms.analytic...: 20 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 99 KB
99 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://dotnet.microsoft.com/static/js/general.min.js?v=crDs_3gNR-ZIa2Eev4LJJO8V0OuAtjVqGkIfRK0oSy870 KB51 KB (74%)✓3rd
https://js.monitor.azure.com/scripts/b/ai.3.min.js67 KB28 KB (42%)✓3rd
https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.js60 KB20 KB (34%)✓3rd
https://dotnet.microsoft.com/static/js/cookie-consent.min.js?v=cPwRYK_KXC_97Lbz_R3EFgGKqN3we23dMoCDF5iaWgQ4 KB—✓3rd
https://dotnet.microsoft.com/static/js/culture-selector.min.js?v=GE6nshQOS7i_CIDhmaS7j-Dhs9UjMawW6Ff-bpkns2E2 KB—✓3rd
https://uhf.microsoft.com/statics/20260421.16.02/js/entry.js2 KB—✓3rd
https://dotnet.microsoft.com/static/js/theme-toggle.min.js?v=ClfBS9u6I4w4prx1z3mrn-N4g7EmhBStfKxrMi9QxQ42 KB—✓3rd
https://dotnet.microsoft.com/static/js/main.min.js?v=6VTgZMA9byKuNVNnUSMA8SzBB9MuqRoJlNVCooNxlu413 KB—✓3rd
https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js274 KB—✓3rd
https://dotnet.microsoft.com/static/js/cda-tracker.min.js?v=SyYaSyIMxBKYbravFr4rQISs39K6Wu_jyNMP-TEkBgE1 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
11 fonts (370 KB)
PASS
11 fonts (370 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

370 KB total

Render-blocking

0

of 11

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 2.7 s LCP 3.4 shttps://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woffspace-grotesk-v12-latin... https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff — 14.7 KiB — 634 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff2space-grotesk-v12-latin... https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff2 — 11.7 KiB — 638 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woffopen-sans-v34-latin-reg... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff — 20.9 KiB — 809 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff2open-sans-v34-latin-reg... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff2 — 16.9 KiB — 603 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woffopen-sans-v34-latin-600... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff — 20.8 KiB — 781 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff2open-sans-v34-latin-600... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff2 — 16.9 KiB — 787 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woffopen-sans-v34-latin-700... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff — 20.3 KiB — 746 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff2open-sans-v34-latin-700... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff2 — 16.5 KiB — 606 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.woffdotnetmdl2-icons-061622... https://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.woff — 14.5 KiB — 177 ms — font-display: swaphttps://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.ttfdotnetmdl2-icons-061622... https://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.ttf — 24.2 KiB — 179 ms — font-display: swapdata:font/woff;base64,d09GRgABAAAAAwPAAA4AAAAGHZAAA7MzAAAAAAAAAAAAAAAAAAAAAAAAAABPUy8yAAABRAAAAEgAA…woff;base64,d09GRgABAAA... data:font/woff;base64,d09GRgABAAAAAwPAAA4AAAAGHZAAA7MzAAAAAAAAAAAAAAAAAAAAAAAAAABPUy8yAAABRAAAAEgAA… — 192.9 KiB — 71 ms — font-display: swap
space-grotesk-v12-latin... woff swap
Size 15 KB
Load time 634 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
space-grotesk-v12-latin... woff2 swap
Size 12 KB
Load time 638 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
open-sans-v34-latin-reg... woff swap
Size 21 KB
Load time 809 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
open-sans-v34-latin-reg... woff2 swap
Size 17 KB
Load time 603 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
open-sans-v34-latin-600... woff swap
Size 21 KB
Load time 781 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
open-sans-v34-latin-600... woff2 swap
Size 17 KB
Load time 787 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
open-sans-v34-latin-700... woff swap
Size 20 KB
Load time 746 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
open-sans-v34-latin-700... woff2 swap
Size 17 KB
Load time 606 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
dotnetmdl2-icons-061622... woff swap
Size 15 KB
Load time 177 ms
Start 2.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
dotnetmdl2-icons-061622... ttf swap
Size 24 KB
Load time 179 ms
Start 2.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
woff;base64,d09GRgABAAA... woff swap
Size 193 KB
Load time 71 ms
Start 3.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~189 KB and ~378 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
40 requests over 6774ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.7 s LCP 3.4 shttps://asp.net// https://asp.net/ — 301 — 124 B — 277 ms — h2https://www.asp.net/www.asp.net/ https://www.asp.net/ — 302 — 434 B — 656 ms — h2https://dotnet.microsoft.com/en-us/apps/aspnetdotnet.microsoft.com/en-us/apps/asp... https://dotnet.microsoft.com/en-us/apps/aspnet — 200 — 89.8 KiB — 923 ms — h2https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woffdotnet.microsoft.com/static/fonts/s... https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff — 200 — 14.7 KiB — 634 ms — h2https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff2dotnet.microsoft.com/static/fonts/s... https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff2 — 200 — 11.7 KiB — 638 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woffdotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff — 200 — 20.9 KiB — 809 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff2dotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff2 — 200 — 16.9 KiB — 603 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woffdotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff — 200 — 20.8 KiB — 781 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff2dotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff2 — 200 — 16.9 KiB — 787 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woffdotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff — 200 — 20.3 KiB — 746 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff2dotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff2 — 200 — 16.5 KiB — 606 ms — h2https://uhf.microsoft.com/statics/20260421.16.02/css/style-BpAANDpw.cssuhf.microsoft.com/statics/20260421.... https://uhf.microsoft.com/statics/20260421.16.02/css/style-BpAANDpw.css — 200 — 226.0 KiB — 30 ms — h2https://dotnet.microsoft.com/static/css/bootstrap-custom.min.css?v=IftXf1dte1yxkBhZUaoYiwhE96WxlRnUdGyBghFOM70dotnet.microsoft.com/static/css/boo... https://dotnet.microsoft.com/static/css/bootstrap-custom.min.css?v=IftXf1dte1yxkBhZUaoYiwhE96WxlRnUdGyBghFOM70 — 200 — 59.1 KiB — 859 ms — h2https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.jsjs.monitor.azure.com/scripts/c/ms.a... https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.js — 200 — 59.9 KiB — 73 ms — h2https://dotnet.microsoft.com/static/js/cookie-consent.min.js?v=cPwRYK_KXC_97Lbz_R3EFgGKqN3we23dMoCDF5iaWgQdotnet.microsoft.com/static/js/cook... https://dotnet.microsoft.com/static/js/cookie-consent.min.js?v=cPwRYK_KXC_97Lbz_R3EFgGKqN3we23dMoCDF5iaWgQ — 200 — 3.5 KiB — 640 ms — h2https://uhf.microsoft.com/images/microsoft/RE1Mu3b.pnguhf.microsoft.com/images/microsoft/... https://uhf.microsoft.com/images/microsoft/RE1Mu3b.png — 200 — 4.2 KiB — 4 ms — h2https://dotnet.microsoft.com/static/js/culture-selector.min.js?v=GE6nshQOS7i_CIDhmaS7j-Dhs9UjMawW6Ff-bpkns2Edotnet.microsoft.com/static/js/cult... https://dotnet.microsoft.com/static/js/culture-selector.min.js?v=GE6nshQOS7i_CIDhmaS7j-Dhs9UjMawW6Ff-bpkns2E — 200 — 1.6 KiB — 634 ms — h2https://uhf.microsoft.com/statics/20260421.16.02/js/entry.jsuhf.microsoft.com/statics/20260421.... https://uhf.microsoft.com/statics/20260421.16.02/js/entry.js — 200 — 1.8 KiB — 9 ms — h2https://dotnet.microsoft.com/static/js/theme-toggle.min.js?v=ClfBS9u6I4w4prx1z3mrn-N4g7EmhBStfKxrMi9QxQ4dotnet.microsoft.com/static/js/them... https://dotnet.microsoft.com/static/js/theme-toggle.min.js?v=ClfBS9u6I4w4prx1z3mrn-N4g7EmhBStfKxrMi9QxQ4 — 200 — 2.2 KiB — 585 ms — h2https://dotnet.microsoft.com/static/js/general.min.js?v=crDs_3gNR-ZIa2Eev4LJJO8V0OuAtjVqGkIfRK0oSy8dotnet.microsoft.com/static/js/gene... https://dotnet.microsoft.com/static/js/general.min.js?v=crDs_3gNR-ZIa2Eev4LJJO8V0OuAtjVqGkIfRK0oSy8 — 200 — 69.8 KiB — 431 ms — h2https://dotnet.microsoft.com/static/js/main.min.js?v=6VTgZMA9byKuNVNnUSMA8SzBB9MuqRoJlNVCooNxlu4dotnet.microsoft.com/static/js/main... https://dotnet.microsoft.com/static/js/main.min.js?v=6VTgZMA9byKuNVNnUSMA8SzBB9MuqRoJlNVCooNxlu4 — 200 — 12.6 KiB — 176 ms — h2https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.jswcpstatic.microsoft.com/mscc/lib/v2... https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js — 200 — 273.7 KiB — 252 ms — h2https://dotnet.microsoft.com/static/js/cda-tracker.min.js?v=SyYaSyIMxBKYbravFr4rQISs39K6Wu_jyNMP-TEkBgEdotnet.microsoft.com/static/js/cda-... https://dotnet.microsoft.com/static/js/cda-tracker.min.js?v=SyYaSyIMxBKYbravFr4rQISs39K6Wu_jyNMP-TEkBgE — 200 — 1.2 KiB — 165 ms — h2https://dotnet.microsoft.com/static/js/footer.min.js?v=RVslb4HZMiuSbGsDzcAsIhvWLZgw2HmQR-fsPOHkfMQdotnet.microsoft.com/static/js/foot... https://dotnet.microsoft.com/static/js/footer.min.js?v=RVslb4HZMiuSbGsDzcAsIhvWLZgw2HmQR-fsPOHkfMQ — 200 — 937 B — 182 ms — h2https://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.woffdotnet.microsoft.com/static/fonts/d... https://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.woff — 200 — 14.5 KiB — 177 ms — h2https://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.ttfdotnet.microsoft.com/static/fonts/d... https://dotnet.microsoft.com/static/fonts/dotnetmdl2-icons-061622.ttf — 200 — 24.2 KiB — 179 ms — h2https://dotnet.microsoft.com/blob-assets/images/illustrations/swimlane-blazor-ui-build.svgdotnet.microsoft.com/blob-assets/im... https://dotnet.microsoft.com/blob-assets/images/illustrations/swimlane-blazor-ui-build.svg — 200 — 10.8 KiB — 642 ms — h2https://uhf.microsoft.com/statics/20260421.16.02/js/index-Cifsy-6O.jsuhf.microsoft.com/statics/20260421.... https://uhf.microsoft.com/statics/20260421.16.02/js/index-Cifsy-6O.js — 200 — 31.4 KiB — 13 ms — h2https://js.monitor.azure.com/scripts/b/ai.3.min.jsjs.monitor.azure.com/scripts/b/ai.3... https://js.monitor.azure.com/scripts/b/ai.3.min.js — 200 — 66.6 KiB — 78 ms — h2https://uhf-exp-fd-gbcrdgggfbggh0g3.b02.azurefd.net/api/v1/tasuhf-exp-fd-gbcrdgggfbggh0g3.b02.azu... https://uhf-exp-fd-gbcrdgggfbggh0g3.b02.azurefd.net/api/v1/tas — 204 — 0 B — 118 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.7 s LCP 3.4 shttps://asp.net// https://asp.net/ — 301 — 124 B — 277 ms — h2https://www.asp.net/www.asp.net/ https://www.asp.net/ — 302 — 434 B — 656 ms — h2https://dotnet.microsoft.com/en-us/apps/aspnetdotnet.microsoft.com/en-us/apps/asp... https://dotnet.microsoft.com/en-us/apps/aspnet — 200 — 89.8 KiB — 923 ms — h2https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woffdotnet.microsoft.com/static/fonts/s... https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff — 200 — 14.7 KiB — 634 ms — h2https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff2dotnet.microsoft.com/static/fonts/s... https://dotnet.microsoft.com/static/fonts/space-grotesk-v12-latin-700.woff2 — 200 — 11.7 KiB — 638 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woffdotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff — 200 — 20.9 KiB — 809 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff2dotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-regular.woff2 — 200 — 16.9 KiB — 603 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woffdotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff — 200 — 20.8 KiB — 781 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff2dotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-600.woff2 — 200 — 16.9 KiB — 787 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woffdotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff — 200 — 20.3 KiB — 746 ms — h2https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff2dotnet.microsoft.com/static/fonts/o... https://dotnet.microsoft.com/static/fonts/open-sans-v34-latin-700.woff2 — 200 — 16.5 KiB — 606 ms — h2https://uhf.microsoft.com/statics/20260421.16.02/css/style-BpAANDpw.cssuhf.microsoft.com/statics/20260421.... https://uhf.microsoft.com/statics/20260421.16.02/css/style-BpAANDpw.css — 200 — 226.0 KiB — 30 ms — h2https://dotnet.microsoft.com/static/css/bootstrap-custom.min.css?v=IftXf1dte1yxkBhZUaoYiwhE96WxlRnUdGyBghFOM70dotnet.microsoft.com/static/css/boo... https://dotnet.microsoft.com/static/css/bootstrap-custom.min.css?v=IftXf1dte1yxkBhZUaoYiwhE96WxlRnUdGyBghFOM70 — 200 — 59.1 KiB — 859 ms — h2https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.jsjs.monitor.azure.com/scripts/c/ms.a... https://js.monitor.azure.com/scripts/c/ms.analytics-web-4.min.js — 200 — 59.9 KiB — 73 ms — h2https://dotnet.microsoft.com/static/js/cookie-consent.min.js?v=cPwRYK_KXC_97Lbz_R3EFgGKqN3we23dMoCDF5iaWgQdotnet.microsoft.com/static/js/cook... https://dotnet.microsoft.com/static/js/cookie-consent.min.js?v=cPwRYK_KXC_97Lbz_R3EFgGKqN3we23dMoCDF5iaWgQ — 200 — 3.5 KiB — 640 ms — h2https://uhf.microsoft.com/images/microsoft/RE1Mu3b.pnguhf.microsoft.com/images/microsoft/... https://uhf.microsoft.com/images/microsoft/RE1Mu3b.png — 200 — 4.2 KiB — 4 ms — h2https://dotnet.microsoft.com/static/js/culture-selector.min.js?v=GE6nshQOS7i_CIDhmaS7j-Dhs9UjMawW6Ff-bpkns2Edotnet.microsoft.com/static/js/cult... https://dotnet.microsoft.com/static/js/culture-selector.min.js?v=GE6nshQOS7i_CIDhmaS7j-Dhs9UjMawW6Ff-bpkns2E — 200 — 1.6 KiB — 634 ms — h2https://uhf.microsoft.com/statics/20260421.16.02/js/entry.jsuhf.microsoft.com/statics/20260421.... https://uhf.microsoft.com/statics/20260421.16.02/js/entry.js — 200 — 1.8 KiB — 9 ms — h2https://dotnet.microsoft.com/static/js/theme-toggle.min.js?v=ClfBS9u6I4w4prx1z3mrn-N4g7EmhBStfKxrMi9QxQ4dotnet.microsoft.com/static/js/them... 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datahttps://uhf-exp-fd-gbcrdgggfbggh0g3.b02.azurefd.net/api/v1/tasuhf-exp-fd-gbcrdgggfbggh0g3.b02.azu... https://uhf-exp-fd-gbcrdgggfbggh0g3.b02.azurefd.net/api/v1/tas — 200 — 842 B — 28 ms — h2https://js.monitor.azure.com/scripts/b/ai.config.1.cfg.jsonjs.monitor.azure.com/scripts/b/ai.c... https://js.monitor.azure.com/scripts/b/ai.config.1.cfg.json — 200 — 1.3 KiB — 18 ms — h2https://dotnet.microsoft.com/favicon.icodotnet.microsoft.com/favicon.ico https://dotnet.microsoft.com/favicon.ico — 200 — 162.6 KiB — 292 ms — h2https://dotnet.microsoft.com/blob-assets/images/illustrations/swimlane-aspnet-extends-dotnet.svgdotnet.microsoft.com/blob-assets/im... https://dotnet.microsoft.com/blob-assets/images/illustrations/swimlane-aspnet-extends-dotnet.svg — 200 — 61.3 KiB — 319 ms — h2https://westus2-0.in.applicationinsights.azure.com/v2/trackwestus2-0.in.applicationinsights.az... https://westus2-0.in.applicationinsights.azure.com/v2/track — 204 — 0 B — 754 ms — h2https://westus2-0.in.applicationinsights.azure.com/v2/trackwestus2-0.in.applicationinsights.az... https://westus2-0.in.applicationinsights.azure.com/v2/track — 200 — 166 B — 269 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=0browser.events.data.microsoft.com/O... https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=0 — 200 — 0 B — 540 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=0browser.events.data.microsoft.com/O... https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=0 — 200 — 762 B — 574 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=0browser.events.data.microsoft.com/O... 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 536ms · 204KB · $7/mo
dotnet.microsoft.com
Other
Optional
Execution 124ms
Transfer 90 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 118ms
Transfer 0 KB
Monthly Cost $2/mo
dotnet.microsoft.com
Other
Optional
Execution 93ms
Transfer 13 KB
Monthly Cost $1/mo
js.monitor.azure.com
Other
Optional
Execution 72ms
Transfer 67 KB
Unused 42%
Monthly Cost $1/mo
uhf.microsoft.com
Other
Optional
Execution 71ms
Transfer 31 KB
Monthly Cost $1/mo
dotnet.microsoft.com
Other
Optional
Execution 58ms
Transfer 4 KB
Monthly Cost $1/mo

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

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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