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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
77
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.

1.06 s

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

1.19 s

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

11 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.021

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

1.47 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.

5.44 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 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
17.2 MB transferred, 51 requests
FIX
17.2 MB transferred, 51 requests
Critical::
Page weighs 19.6 MB (17.2 MB transferred)
Warning::
Images are 5.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.5 MB
Warning::
JavaScript is 1010 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1010 KB
Info::
51 HTTP requests
Info::
Estimated 3.6 g CO2 per page load
17.2 MB / 2.4 MB budget
17.2 MB transferred
51 requests
3.6 g CO2 per page load
Other 10.5 MiB 61%
Images 5.5 MiB 32%
JavaScript 1010.2 KiB 6%
CSS 91.5 KiB 1%
HTML 49.0 KiB 0%
Fonts 47.4 KiB 0%
Other 9.6 KiB 0%
Other 3.8 KiB 0%
Other 3.3 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

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 (17.2 MiB of 17.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
15 scripts, 466 KB unused
FIX
15 scripts, 466 KB unused
Warning::
https://res.cdn.office.net/admincenter/admin-main/...: 290 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://res.cdn.office.net/officehub/bundles/unaut...: 94 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-co...: 33 KB unused (14%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://res.cdn.office.net/officehub/bundles/unaut...: 24 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://res.cdn.office.net/officehub/bundles/unaut...: 24 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 466 KB
466 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://res.cdn.office.net/admincenter/admin-main/2026.4.2.8/floodgate.en.bundle.js332 KB290 KB (88%)✓3rd
https://res.cdn.office.net/officehub/bundles/unauth-mcm-scripts-6378fb4b6f.js187 KB94 KB (51%)✓3rd
https://wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js274 KB33 KB (14%)✓3rd
https://res.cdn.office.net/officehub/bundles/unauth-936aa5c11c.js64 KB24 KB (38%)✓3rd
https://res.cdn.office.net/officehub/bundles/unauth-vendor-f0ab3fa70e.js35 KB24 KB (71%)✓3rd
https://res.cdn.office.net/officehub/bundles/otel-logger-39618b5914375db48ab3.js37 KB—✓3rd
https://res.cdn.office.net/officehub/bundles/microsoft-clarity-ff3e2df9ac.js2 KB—✓3rd
https://res.cdn.office.net/officehub/bundles/unauth-mcm-faq-3ed592771b.js1 KB—✓3rd
https://res.cdn.office.net/officehub/bundles/unauth-mcm-prompt-carousel-dcd5fb7ee0.js4 KB—✓3rd
https://res.cdn.office.net/officehub/bundles/unauth-page-performance-fe909b4df2.js2 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

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

F
Page Weight Inventory
Action
51 resources · 17.2 MB · 466 KB savings available
FIX
51 resources · 17.2 MB · 466 KB savings available
Warning::
Page weight 16.2 MB over 1MB target
Got: 17.2 MB Expected: ≤ 1 MB
Info::
~466 KB of savings available
Warning::
50 third-party resources (100% of weight)
Info::
9 resources over 200KB
51 resources · 17.2 MiB · 50 third-party 16.2 MiB over 1MB target
Media 61% · 10.5 MiB
Image 32% · 5.5 MiB
JavaScript 6% · 1010.2 KiB
CSS 1% · 91.5 KiB
Document 0% · 49.0 KiB
Font 0% · 47.4 KiB
Other 0% · 7.3 KiB

~466.2 KiB of savings available

Remove unused JavaScript: 466.2 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
Image Optimization
10 images, 0 KB saveable
REVIEW
10 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.
10 images 5.5 MB
0 oversized -0 KB
10 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
980ms total JS execution
REVIEW
980ms total JS execution
Warning::
https://res.cdn.office.net/officehub/bundles/unaut...: 260ms CPU time
Warning::
https://m365.cloud.microsoft/: 259ms CPU time
Info::
Unattributable: 205ms CPU time
Info::
https://res.cdn.office.net/admincenter/admin-main/...: 79ms CPU time
Info::
https://scripts.clarity.ms/0.8.59/clarity.js: 66ms CPU time
Warning::
Third-party scripts: 980ms (100% of total)

Main Thread Breakdown

Script Evaluation 31% Other 31% Rendering 18% Style & Layout 10% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://res.cdn.office.net/officehub/bundles/unauth-936aa5c11c.js260ms84ms4ms3rd
https://m365.cloud.microsoft/259ms9ms3ms3rd
Unattributable205ms3ms0ms3rd
https://res.cdn.office.net/admincenter/admin-main/2026.4.2.8/floodgate.en.bundle.js79ms49ms28ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js66ms60ms2ms3rd
https://res.cdn.office.net/officehub/bundles/unauth-vendor-f0ab3fa70e.js58ms50ms6ms3rd
https://res.cdn.office.net/officehub/bundles/unauth-mcm-scripts-6378fb4b6f.js53ms36ms15ms3rd
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
4 fonts (47 KB)
PASS
4 fonts (47 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

47 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 1.1 s LCP 1.2 shttps://res.cdn.office.net/officehub/versionless/webfonts/segoeui_light.woff2segoeui_light.woff2 https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_light.woff2 — 11.1 KiB — 24 ms — font-display: swaphttps://res.cdn.office.net/officehub/versionless/webfonts/segoeui_regular.woff2segoeui_regular.woff2 https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_regular.woff2 — 11.7 KiB — 27 ms — font-display: swaphttps://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semibold.woff2segoeui_semibold.woff2 https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semibold.woff2 — 11.9 KiB — 30 ms — font-display: swaphttps://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semilight.woff2segoeui_semilight.woff2 https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semilight.woff2 — 12.7 KiB — 24 ms — font-display: swap
segoeui_light.woff2 woff2 swap
Size 11 KB
Load time 24 ms
Start 297 ms
Risk FOUT — text flashes from fallback to web font
segoeui_regular.woff2 woff2 swap
Size 12 KB
Load time 27 ms
Start 297 ms
Risk FOUT — text flashes from fallback to web font
segoeui_semibold.woff2 woff2 swap
Size 12 KB
Load time 30 ms
Start 297 ms
Risk FOUT — text flashes from fallback to web font
segoeui_semilight.woff2 woff2 swap
Size 13 KB
Load time 24 ms
Start 298 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)
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
51 requests over 4155ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.1 s LCP 1.2 shttps://cloud.microsoft// https://cloud.microsoft/ — 301 — 133 B — 94 ms — h2https://m365.cloud.microsoft/m365.cloud.microsoft/ https://m365.cloud.microsoft/ — 200 — 49.0 KiB — 224 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-3a910e427c.cssres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-3a910e427c.css — 200 — 82.2 KiB — 33 ms — h2https://www.microsoft.com/onerfstatics/marketingsites-neu-prod/west-european/shell/_scrf/css/themes=default.device=uplevel_web_pc/63-57d110/c9-be0100/a6-e969ef/43-9f2e7c/82-8b5456/a0-5d3913/4f-460e79/ae-f1ac0c?ver=2.0&_cf=02242021_3231www.microsoft.com/onerfstatics/mark... https://www.microsoft.com/onerfstatics/marketingsites-neu-prod/west-european/shell/_scrf/css/themes=default.device=uplevel_web_pc/63-57d110/c9-be0100/a6-e969ef/43-9f2e7c/82-8b5456/a0-5d3913/4f-460e79/ae-f1ac0c?ver=2.0&_cf=02242021_3231 — -1 — 0 B — 37 ms — https://res.cdn.office.net/officehub/bundles/sharedfontstyles-f7f2466ff5.cssres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/sharedfontstyles-f7f2466ff5.css — 200 — 1.1 KiB — 29 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_light.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_light.woff2 — 200 — 11.1 KiB — 24 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_regular.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_regular.woff2 — 200 — 11.7 KiB — 27 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semibold.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semibold.woff2 — 200 — 11.9 KiB — 30 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semilight.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semilight.woff2 — 200 — 12.7 KiB — 24 ms — h2https://res.cdn.office.net/officehub/bundles/microsoft-clarity-ff3e2df9ac.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/microsoft-clarity-ff3e2df9ac.js — 200 — 2.3 KiB — 27 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 — 80 ms — h2https://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=1www.microsoft.com/onerfstatics/mark... 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=1 — -1 — 0 B — 79 ms — https://res.cdn.office.net/officehub/bundles/unauth-mcm-bebop-0200c4778d.cssres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-mcm-bebop-0200c4778d.css — 200 — 8.1 KiB — 13 ms — h2https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/bebop-hero-5936ea4e84.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/bebop-hero-5936ea4e84.png — 200 — 2.5 MiB — 114 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth/copilot-app-4b262e7e56.svgres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth/copilot-app-4b262e7e56.svg — 200 — 1.3 KiB — 14 ms — h3https://res.cdn.office.net/officehub/bundles/unauth-mcm-prompt-carousel-dcd5fb7ee0.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-mcm-prompt-carousel-dcd5fb7ee0.js — 200 — 4.1 KiB — 14 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-mcm-faq-3ed592771b.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-mcm-faq-3ed592771b.js — 200 — 1.5 KiB — 18 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-vendor-f0ab3fa70e.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-vendor-f0ab3fa70e.js — 200 — 35.1 KiB — 39 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-936aa5c11c.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-936aa5c11c.js — 200 — 64.4 KiB — 41 ms — h2https://res.cdn.office.net/officehub/bundles/otel-logger-39618b5914375db48ab3.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/otel-logger-39618b5914375db48ab3.js — 200 — 36.5 KiB — 42 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 — 333 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-mcm-scripts-6378fb4b6f.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-mcm-scripts-6378fb4b6f.js — 200 — 186.7 KiB — 49 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-page-performance-fe909b4df2.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-page-performance-fe909b4df2.js — 200 — 1.7 KiB — 44 ms — h2https://res.cdn.office.net/officehub/images/content/images/unauth/powerpoint-17c3d2817a.svgres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth/powerpoint-17c3d2817a.svg — 200 — 820 B — 73 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module1-bebop-0f779c4db3.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module1-bebop-0f779c4db3.png — 200 — 916.6 KiB — 182 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module2-bebop-320aac71b9.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module2-bebop-320aac71b9.png — 200 — 478.7 KiB — 164 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module3-bebop-6219dbdf9b.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module3-bebop-6219dbdf9b.png — 200 — 727.6 KiB — 174 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module4-bebop-256e4924c5.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module4-bebop-256e4924c5.png — 200 — 733.1 KiB — 177 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-desktop-download-20473760ce.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-desktop-download-20473760ce.png — 200 — 114.8 KiB — 120 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/mcm-qr-code-c70a54f5a0.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/mcm-qr-code-c70a54f5a0.png — 200 — 84.9 KiB — 117 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.1 s LCP 1.2 shttps://cloud.microsoft// https://cloud.microsoft/ — 301 — 133 B — 94 ms — h2https://m365.cloud.microsoft/m365.cloud.microsoft/ https://m365.cloud.microsoft/ — 200 — 49.0 KiB — 224 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-3a910e427c.cssres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-3a910e427c.css — 200 — 82.2 KiB — 33 ms — h2https://www.microsoft.com/onerfstatics/marketingsites-neu-prod/west-european/shell/_scrf/css/themes=default.device=uplevel_web_pc/63-57d110/c9-be0100/a6-e969ef/43-9f2e7c/82-8b5456/a0-5d3913/4f-460e79/ae-f1ac0c?ver=2.0&_cf=02242021_3231www.microsoft.com/onerfstatics/mark... https://www.microsoft.com/onerfstatics/marketingsites-neu-prod/west-european/shell/_scrf/css/themes=default.device=uplevel_web_pc/63-57d110/c9-be0100/a6-e969ef/43-9f2e7c/82-8b5456/a0-5d3913/4f-460e79/ae-f1ac0c?ver=2.0&_cf=02242021_3231 — -1 — 0 B — 37 ms — https://res.cdn.office.net/officehub/bundles/sharedfontstyles-f7f2466ff5.cssres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/sharedfontstyles-f7f2466ff5.css — 200 — 1.1 KiB — 29 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_light.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_light.woff2 — 200 — 11.1 KiB — 24 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_regular.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_regular.woff2 — 200 — 11.7 KiB — 27 ms — h2https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semibold.woff2res.cdn.office.net/officehub/versio... https://res.cdn.office.net/officehub/versionless/webfonts/segoeui_semibold.woff2 — 200 — 11.9 KiB — 30 ms — 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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=1 — -1 — 0 B — 79 ms — https://res.cdn.office.net/officehub/bundles/unauth-mcm-bebop-0200c4778d.cssres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-mcm-bebop-0200c4778d.css — 200 — 8.1 KiB — 13 ms — h2https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/bebop-hero-5936ea4e84.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/bebop-hero-5936ea4e84.png — 200 — 2.5 MiB — 114 ms — 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h2https://res.cdn.office.net/officehub/bundles/unauth-936aa5c11c.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-936aa5c11c.js — 200 — 64.4 KiB — 41 ms — h2https://res.cdn.office.net/officehub/bundles/otel-logger-39618b5914375db48ab3.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/otel-logger-39618b5914375db48ab3.js — 200 — 36.5 KiB — 42 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 — 333 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-mcm-scripts-6378fb4b6f.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-mcm-scripts-6378fb4b6f.js — 200 — 186.7 KiB — 49 ms — h2https://res.cdn.office.net/officehub/bundles/unauth-page-performance-fe909b4df2.jsres.cdn.office.net/officehub/bundle... https://res.cdn.office.net/officehub/bundles/unauth-page-performance-fe909b4df2.js — 200 — 1.7 KiB — 44 ms — h2https://res.cdn.office.net/officehub/images/content/images/unauth/powerpoint-17c3d2817a.svgres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth/powerpoint-17c3d2817a.svg — 200 — 820 B — 73 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module1-bebop-0f779c4db3.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module1-bebop-0f779c4db3.png — 200 — 916.6 KiB — 182 ms — h3https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module2-bebop-320aac71b9.pngres.cdn.office.net/officehub/images... https://res.cdn.office.net/officehub/images/content/images/unauth-mcm/hero-module2-bebop-320aac71b9.png — 200 — 478.7 KiB — 164 ms — 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https://admin.microsoft.com/api/instrument/logclient — 204 — 224 B — 463 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2browser.events.data.microsoft.com/O... https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2 — 200 — 0 B — 951 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 — 451 B — 183 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2browser.events.data.microsoft.com/O... https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2 — 200 — 0 B — 974 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2browser.events.data.microsoft.com/O... https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2 — 200 — 109 B — 203 ms — h2https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2browser.events.data.microsoft.com/O... https://browser.events.data.microsoft.com/OneCollector/1.0/?cors=true&content-type=application/x-json-stream&w=2 — 200 — 93 B — 105 ms — h2
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 980ms · 693KB · $6/mo
res.cdn.office.net
Other
Costly
Execution 260ms
Transfer 64 KB
Unused 38%
Monthly Cost $1/mo
m365.cloud.microsoft
Other
Costly
Execution 259ms
Transfer 49 KB
Monthly Cost $1/mo
Unattributable
Other
Costly
Execution 205ms
Transfer 0 KB
Monthly Cost $1/mo
res.cdn.office.net
Other
Optional
Execution 79ms
Transfer 332 KB
Unused 88%
Monthly Cost $0/mo
Microsoft Clarity
Session Replay
Optional
Execution 66ms
Transfer 26 KB
Monthly Cost $0/mo
res.cdn.office.net
Other
Optional
Execution 58ms
Transfer 35 KB
Unused 71%
Monthly Cost $0/mo
res.cdn.office.net
Other
Optional
Execution 53ms
Transfer 187 KB
Unused 51%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • res.cdn.office.net adds 260ms and costs ~$1/month
  • m365.cloud.microsoft adds 259ms and costs ~$1/month
  • Unattributable adds 205ms 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

res.cdn.office.net takes 260ms 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

m365.cloud.microsoft takes 259ms 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

Unattributable takes 205ms 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

88% of res.cdn.office.net'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

71% of res.cdn.office.net'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

51% of res.cdn.office.net'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.

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