speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

microsoft.com

https://www.microsoft.com/

26PERF 96A11Y 50BEST 92SEO !AXE ✗CWV

Ranks Overall #1,753 Big Tech #15

Data from Oct 8, 2026, 11:25 PM UTC old, older than this category's 3 days freshness target Measured every 2 days · 21 runs since Aug 28, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This data is old.

Sites are measured on a rolling schedule, so figures here are the newest successful measurement rather than a reading taken just now. Comparisons against other sites may span different points in time.

This URL redirects to https://www.microsoft.com/en-us.

The site’s front door pointing at the page it serves there — a locale or CMS landing path, not a move. The origin is still the address of the site, so history stays under it rather than forking to a path that depends on where the measurement ran. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Uses ReactReactLit 3.3.3Lit 3.3.3

Filmstrip LAB Unthrottled

How the page drew during the measured load, at 8 points across 7.88 s. Compare this filmstrip against another site.

  1. 986 ms
  2. 1.97 s
  3. 2.96 s
  4. 3.94 s
  5. 4.93 s
  6. 5.91 s
  7. 6.90 s
  8. 7.88 s

Lighthouse Scores LAB Simulated

26
Performance
no change
96
Accessibility
↓ -4 (-4%)
50
Best Practices
↓ -4 (-7.4%)
92
SEO
no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-09 → 2026-10-06), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 27.01 s poor ↓ -2666 ms (-9%) 16.04 s – 43.03 s 3.15 s needs work 61.7% 22.8% 15.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 1.37 s poor 55.2% 11.8% 33%
CLS CWV Cumulative Layout Shift 0.023 good ↑ +0.016 (+228.6%) 0 – 0.612 0.120 needs work 74.3% 10.9% 14.8%
TBT Total Blocking Time 2.94 s poor ↓ -471 ms (-13.8%) 1.06 s – 3.41 s n/a —
FCP First Contentful Paint 7.52 s poor ↓ -1590 ms (-17.5%) 4.82 s – 10.29 s 2.56 s needs work 55.2% 26.4% 18.4%
Speed Index 13.64 s poor ↑ +731 ms (+5.7%) 7.86 s – 13.64 s n/a —
TTFB Time to First Byte 652 ms good ↓ -33 ms (-4.8%) 627 ms – 689 ms 1.36 s needs work 44% 42% 14%

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

resource load delay 1.50 s
element render delay 873 ms
time to first byte 201 ms
resource load duration 14 ms

LCP LAB Simulated vs LCP FIELD

Lab 27.01 s
Field p75 3.15 s

The lab LCP is 8.58× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 7.59 MB ↑ +1307.2 kB (+21.4%) significant 3.72 MB – 7.67 MB
Requests 279 ↓ -4 (-1.4%) 243 – 332
Third-party Weight 1.03 MB ↑ +432.2 kB (+75.9%) significant 519 kB – 1.03 MB
Third-party CPU 487 ms ↑ +9 ms (+1.9%) 234 ms – 1.07 s
Unused JS 891 kB ↑ +249.3 kB (+40.1%) significant 634 kB – 891 kB
Unused CSS 247 kB ↑ +82 B 190 kB – 247 kB

By resource type

Type Transfer Share Size Requests
image 44.1% 3.26 MB 43
script 42.5% 3.14 MB 173
other 6.4% 472 kB 37
stylesheet 3.8% 281 kB 13
font 2.6% 192 kB 9
document 0.7% 48.2 kB 3
Total 7.59 MB 279

Third parties 15 entities

Entity Transfer Size Main thread Simulated
Adobe Scene7 other 448 kB 0 ms
Clicktale script 222 kB 266 ms
s-microsoft.com font 180 kB 0 ms
Google Tag Manager script 91.2 kB 21 ms
Clarity 33.8 kB 172 ms
All 15 1.03 MB 487 ms

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

Scripts disabled
As rendered

88.5% of pixels differ — the page changes substantially. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 33.02 s ↑ +4560 ms (+16%) 13.02 s – 36.23 s
Long Tasks 20 → no change 20 – 20
DOM Elements 4,412 ↑ +489 (+12.5%) significant 2,397 – 4,412
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 2 → no change 0 – 2
A11y Failures 2 ↑ +1 (+100%) significant 1 – 2
A11y Failing Nodes 7 ↑ +2 (+40%) significant 4 – 7

Main thread work

Task Time Share Duration Simulated
script evaluation 82% 27.10 s
other 8% 2.70 s
style layout 5% 1.69 s
script parse compile 2% 804 ms
garbage collection 1% 320 ms
parse HTML 1% 224 ms
paint composite render 1% 182 ms
Total 33.02 s

Axe violations axe-core 4.13.0, full rule set

2 violating nodes across 2 rules, 1794 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical button-name — Buttons must have discernible text 1 node
    Offending element
    1. .sa-default-entry-button 
      <button class="sa-default-entry-button" aria-labelledby="sa-default-entry-text" data-m="{&quot;cN&quot;:&quot;Need Help? Lets Chat&quot;,&quot;ecn&quot;:&quot;Need Help? Lets Chat&quot;,&quot;pa&quot…
  • minor empty-heading — Headings should not be empty 1 node
    Offending element
    1. #base-ui-shell-oc2524 > .msstore-chatonpage[data-action-type="hybridInputAndPills"] > .msstore-chatonpage__heading-container > h2 
      <h2 style="color: #fefefe"> </h2>

Accessibility failures 2 of 37 audits

  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 6 nodes
  • button-name — Buttons do not have an accessible name 1 node

Best Practices failures 6 of 20 audits

  • deprecations — Uses deprecated APIs 1 item
  • third-party-cookies — Uses third-party cookies 24 items
  • image-aspect-ratio — Displays images with incorrect aspect ratio 1 item
  • errors-in-console — Browser errors were logged to the console 7 items
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item
  • valid-source-maps — Missing source maps for large first-party JavaScript 3 items

SEO failures 1 of 10 audits

  • link-text — Links do not have descriptive text 5 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 7 console errors

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-10-03 3.14 s 1.35 s 0.120 2.55 s 1.36 s
2026-09-26 3.11 s 1.30 s 0.120 2.52 s 1.36 s
2026-09-19 3.09 s 1.26 s 0.120 2.50 s 1.36 s
2026-09-12 3.08 s 1.26 s 0.110 2.49 s 1.37 s
2026-09-05 3.07 s 1.28 s 0.110 2.49 s 1.38 s
2026-08-29 3.08 s 1.32 s 0.110 2.49 s 1.39 s
2026-08-22 3.10 s 1.43 s 0.110 2.50 s 1.39 s
2026-08-15 3.13 s 1.50 s 0.100 2.53 s 1.40 s
2026-08-08 3.15 s 1.50 s 0.100 2.56 s 1.40 s
2026-08-01 3.16 s 1.54 s 0.110 2.59 s 1.39 s
2026-07-25 3.15 s 1.55 s 0.120 2.61 s 1.39 s
2026-07-18 3.14 s 1.56 s 0.130 2.63 s 1.40 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 8, 2026, 11:25 PM UTC 26 27.01 s 0.023 2.94 s 7.59 MB 3/3 ±11 2,507 +1% 124.7s Wayback
Oct 6, 2026, 10:55 PM UTC 26 29.67 s 0.007 3.41 s 6.25 MB 3/3 ±6 2,787 +12% 111.2s Wayback
Oct 3, 2026, 8:58 PM UTC 4 36.43 s 0.612 2.88 s 6.56 MB 3/3 ±23 2,663 +7% 117.6s Wayback
Oct 1, 2026, 2:12 PM UTC 27 24.59 s 0.015 3.14 s 6.43 MB 3/3 ±21 2,449 -2% 128.3s Wayback
Sep 29, 2026, 11:11 AM UTC 27 27.51 s 0.013 2.56 s 6.62 MB 3/3 ±23 2,504 +1% 121.6s Wayback
Sep 26, 2026, 9:13 AM UTC 35 16.04 s 0.026 1.06 s 3.72 MB 3/3 ±9 3,048 +23% 128.4s Wayback
Sep 23, 2026, 10:42 PM UTC 26 24.08 s 0.001 2.90 s 6.33 MB 3/3 ±9 2,472 -1% 132.4s Wayback
Sep 21, 2026, 7:58 PM UTC 26 28.34 s 0.014 2.77 s 6.18 MB 3/3 ±23 2,455 -1% 155.3s Wayback
Sep 19, 2026, 4:16 PM UTC 28 33.42 s 0.005 1.83 s 6.56 MB 3/3 ±2 3,459 +39% 124.1s Wayback
Sep 17, 2026, 11:02 AM UTC 26 26.25 s 0.013 2.94 s 6.62 MB 3/3 ±23 2,472 -1% 158.7s Wayback
Sep 15, 2026, 5:54 AM UTC 26 26.23 s 0.013 2.74 s 6.62 MB 3/3 ±22 2,476 0% 152.4s Wayback
Sep 13, 2026, 3:31 AM UTC 28 23.18 s 0.015 2.34 s 6.60 MB 3/3 ±2 2,983 +20% 147s Wayback
Sep 11, 2026, 3:12 AM UTC 4 37.73 s 0.601 2.65 s 6.59 MB 3/3 ±24 2,248 -10% 116.2s Wayback
Sep 8, 2026, 11:52 PM UTC 28 33.28 s 0 1.89 s 6.81 MB 3/3 ±3 2,977 +20% 72.1s Wayback
Sep 6, 2026, 11:41 PM UTC 27 27.01 s 0.011 2.72 s 7.48 MB 3/3 ±22 2,453 -1% 82.8s Wayback
Sep 4, 2026, 9:25 PM UTC 26 43.03 s 0.053 2.91 s 7.67 MB 3/3 ±22 2,545 +2% 88s Wayback
Sep 4, 2026, 10:49 AM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 40.1s
Sep 3, 2026, 6:53 AM UTC 27 34.23 s 0.008 2.09 s 7.48 MB 3/3 ±2 3,266 +31% 72.4s Wayback
Sep 2, 2026, 3:03 AM UTC 27 24.85 s 0.013 2.77 s 7.49 MB 3/3 ±22 2,351 -5% 88.5s Wayback
Aug 31, 2026, 9:37 PM UTC 26 27.18 s 0.011 3.05 s 7.53 MB 3/3 ±24 2,465 -1% 88.3s Wayback
Aug 28, 2026, 5:42 PM UTC 27 22.10 s 0.025 2.73 s 7.08 MB 3/3 ±23 2,313 -7% 93.4s Wayback