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

tesla.com

https://www.tesla.com/

25PERF 80A11Y 73BEST 75SEO –AXE ✗CWV

Ranks Overall #1,813 Big Tech #26

Data from Oct 13, 2026, 9:10 AM UTC old Measured every 2 days · 21 runs since Sep 1, 2026

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

The most current accessibility pass was served a bot check.

This site is loaded several times per measurement, and one of those loads — the accessibility pass — was answered with Access Denied, an automated-traffic check rather than tesla.com. It was tried twice.

The performance figures below are unaffected. The screenshots, filmstrip and without-JavaScript comparison are older results from the last load that reached the site, where there was one.

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

Stack

Akamai Hosted by Akamai

Filmstrip LAB Unthrottled

How the page drew during the measured load, at 8 points across 5.90 s. Compare this filmstrip against another site.

  1. 738 ms
  2. 1.48 s
  3. 2.21 s
  4. 2.95 s
  5. 3.69 s
  6. 4.43 s
  7. 5.17 s
  8. 5.90 s

Lighthouse Scores LAB Simulated

25
Performance
no change
80
Accessibility
no change
73
Best Practices
no change
75
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 (2026-09-13 → 2026-10-10), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 39.94 s poor ↑ +3054 ms (+8.3%) significant 35.54 s – 43.94 s 5.49 s poor 34.1% 15.2% 50.7%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 178 ms good 81.7% 15.7% 2.6%
CLS CWV Cumulative Layout Shift 0.056 good → no change 0.056 – 0.057 0.190 needs work 70.3% 28.6% 1.1%
TBT Total Blocking Time 4.40 s poor ↑ +1029 ms (+30.5%) significant 2.44 s – 5.04 s n/a —
FCP First Contentful Paint 6.78 s poor ↓ -16485 ms (-70.8%) 4.93 s – 23.62 s 2.40 s needs work 60.6% 22.5% 16.9%
Speed Index 12.21 s poor ↓ -11061 ms (-47.5%) significant 12.21 s – 23.62 s n/a —
TTFB Time to First Byte 633 ms good ↓ -48 ms (-7%) 621 ms – 785 ms 553 ms good 85% 11.5% 3.5%

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 2.24 s
element render delay 1.31 s
time to first byte 142 ms
resource load duration 8 ms

LCP LAB Simulated vs LCP FIELD

Lab 39.94 s
Field p75 5.49 s

The lab LCP is 7.28× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 12.83 MB ↑ +1328.6 kB (+11.9%) 9.95 MB – 18.61 MB
Requests 186 ↑ +4 (+2.2%) 178 – 195
Third-party Weight 1.72 MB ↓ -14.4 kB (-0.9%) 1.46 MB – 1.73 MB
Third-party CPU 613 ms ↑ +44 ms (+7.7%) 368 ms – 613 ms
Unused JS 1.67 MB ↑ +49.5 kB (+3.1%) 1.36 MB – 1.69 MB
Unused CSS 344 kB ↑ +1.1 kB (+0.3%) 315 kB – 344 kB

By resource type

Type Transfer Share Size Requests
media 45.2% 5.79 MB 2
script 39.4% 5.05 MB 31
image 5.7% 733 kB 41
stylesheet 3.1% 397 kB 9
document 2.8% 363 kB 6
other 2.3% 297 kB 49
font 1.5% 193 kB 6
Total 12.83 MB 186

Third parties 11 entities

Entity Transfer Size Main thread Simulated
Google Tag Manager script 604 kB 233 ms
Google Maps scriptimage 598 kB 81 ms
Facebook script 308 kB 240 ms
Optimizely script 97.5 kB 53 ms
Google Fonts 80.4 kB 0 ms
All 11 1.72 MB 613 ms

Page health

Metric Value Change / range Trend
Main Thread Work 19.66 s ↓ -1742 ms (-8.1%) 15.62 s – 26.84 s
Long Tasks 20 → no change 20 – 20
DOM Elements 3,018 ↓ -3 (-0.1%) 2,774 – 3,031
A11y Failures 6 → no change 6 – 7
A11y Failing Nodes 48 → no change 47 – 58

Main thread work

Task Time Share Duration Simulated
script evaluation 44% 8.66 s
style layout 32% 6.27 s
other 13% 2.58 s
script parse compile 6% 1.15 s
parse HTML 2% 370 ms
garbage collection 2% 347 ms
paint composite render 1% 270 ms
Total 19.66 s

Axe violations axe-core 4.13.0, full rule set

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

Accessibility failures 6 of 33 audits

  • heading-order — Heading elements are not in a sequentially-descending order 13 nodes
  • button-name — Buttons do not have an accessible name 12 nodes
  • aria-required-parent — `[role]`s are not contained by their required parent element 11 nodes
  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 8 nodes
  • aria-allowed-attr — `[aria-*]` attributes do not match their roles 3 nodes
  • image-alt — Image elements do not have `[alt]` attributes 1 node

Best Practices failures 4 of 19 audits

  • third-party-cookies — Uses third-party cookies 2 items
  • errors-in-console — Browser errors were logged to the console 4 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 5 items

SEO failures 3 of 9 audits

  • link-text — Links do not have descriptive text 12 items
  • image-alt — Image elements do not have `[alt]` attributes 1 item
  • hreflang — Document doesn't have a valid `hreflang` 3 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 4 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 5.48 s 179 ms 0.190 2.38 s 553 ms
2026-09-26 5.47 s 179 ms 0.190 2.35 s 559 ms
2026-09-19 5.34 s 179 ms 0.190 2.30 s 561 ms
2026-09-12 4.95 s 182 ms 0.070 2.24 s 561 ms
2026-09-05 4.43 s 186 ms 0.060 2.22 s 560 ms
2026-08-29 3.75 s 187 ms 0.040 2.19 s 553 ms
2026-08-22 3.30 s 187 ms 0.040 2.18 s 547 ms
2026-08-15 3.27 s 180 ms 0.040 2.15 s 540 ms
2026-08-08 3.24 s 177 ms 0.040 2.13 s 542 ms
2026-08-01 3.05 s 171 ms 0.030 2.15 s 571 ms
2026-07-25 3.04 s 167 ms 0.030 2.14 s 590 ms
2026-07-18 3.08 s 166 ms 0.030 2.19 s 622 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 13, 2026, 9:10 AM UTC 25 39.94 s 0.056 4.40 s 12.83 MB 1/3 — 2,471 -1% 62.4s Wayback
Oct 7, 2026, 10:50 PM UTC 25 36.89 s 0.056 3.37 s 11.47 MB 1/3 — 2,453 -1% 61.6s Wayback
Oct 5, 2026, 6:00 PM UTC 25 36.66 s 0.056 3.20 s 18.61 MB 1/3 — 2,498 0% 59.1s Wayback
Oct 1, 2026, 12:28 AM UTC 25 36.19 s 0.056 3.74 s 13.27 MB 1/3 — 2,512 +1% 65.6s Wayback
Sep 29, 2026, 12:04 AM UTC 25 41.44 s 0.056 3.54 s 10.59 MB 1/3 — 2,502 +1% 59.8s Wayback
Sep 25, 2026, 4:51 PM UTC 25 36.05 s 0.056 3.33 s 18.58 MB 1/3 — 2,510 +1% 64.3s Wayback
Sep 23, 2026, 10:55 AM UTC 25 36.08 s 0.056 2.72 s 16.25 MB 1/3 — 3,408 +37% 60.2s Wayback
Sep 21, 2026, 7:44 AM UTC 25 35.54 s 0.056 3.74 s 11.96 MB 1/3 — 2,397 -4% 64.7s Wayback
Sep 18, 2026, 5:38 PM UTC 26 43.94 s 0.056 2.87 s 10.47 MB 1/3 — 2,977 +20% 56.6s Wayback
Sep 16, 2026, 9:19 AM UTC 25 37.98 s 0.056 3.52 s 16.57 MB 1/3 — 2,475 0% 57.7s Wayback
Sep 14, 2026, 5:59 AM UTC 26 36.56 s 0.056 2.44 s 10.27 MB 1/3 — 3,300 +33% 55.3s Wayback
Sep 11, 2026, 11:31 PM UTC 25 36.49 s 0.056 4.03 s 12.70 MB 1/3 — 2,333 -6% 66.7s Wayback
Sep 9, 2026, 8:33 PM UTC 25 35.80 s 0.056 4.45 s 9.95 MB 1/3 — 2,334 -6% 48s Wayback
Sep 7, 2026, 7:06 PM UTC 25 36.76 s 0.056 4.57 s 18.31 MB 1/3 — 2,353 -5% 44.1s Wayback
Sep 5, 2026, 3:58 PM UTC 25 36.18 s 0.056 4.67 s 11.03 MB 1/3 — 2,465 -1% 47.9s Wayback
Sep 4, 2026, 10:53 AM UTC 26 36.15 s 0.056 5.04 s 12.34 MB 1/3 — 2,441 -2% 46.7s Wayback
Sep 3, 2026, 1:12 AM UTC 25 35.97 s 0.057 2.99 s 16.73 MB 1/3 — 3,042 +22% 44.4s Wayback
Sep 2, 2026, 1:27 PM UTC ERRORED_DOCUMENT_REQUEST: Lighthouse was unable to reliably load the page you requested. Make sure you are testing the correct URL and that the server is properly responding to all requests. (Status code: 403) 15.9s
Sep 2, 2026, 3:19 AM UTC ERRORED_DOCUMENT_REQUEST: Lighthouse was unable to reliably load the page you requested. Make sure you are testing the correct URL and that the server is properly responding to all requests. (Status code: 403) 15.9s
Sep 1, 2026, 1:16 PM UTC ERRORED_DOCUMENT_REQUEST: Lighthouse was unable to reliably load the page you requested. Make sure you are testing the correct URL and that the server is properly responding to all requests. (Status code: 403) 15.4s
Sep 1, 2026, 1:42 AM UTC ERRORED_DOCUMENT_REQUEST: Lighthouse was unable to reliably load the page you requested. Make sure you are testing the correct URL and that the server is properly responding to all requests. (Status code: 403) 16s