speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time.

Charts Measurement runs Embed a score

11ty.dev

https://www.11ty.dev/

100 100 100 100 ✓AXE ✓CWV

Ranks Overall #77 Built Awesome #67 Developer Tooling #1 Site Generators #1 zachleat #1

Data from Sep 5, 2026, 3:09 AM UTC old Measured every 2 days · 13 runs since Aug 21, 2026

Test elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis

Stack

Build Awesome 4.0.0 Built with Build Awesome 4.0.0
Vercel Hosted by Vercel

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-08-06 → 2026-09-02).

LCP 1.03 s good
INP 89 ms good
CLS 0 good

Lighthouse Scores

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

  1. 375 ms
  2. 750 ms
  3. 1.13 s
  4. 1.50 s
  5. 1.88 s
  6. 2.25 s
  7. 2.63 s
  8. 3.00 s

Without JavaScript

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

Scripts disabled
As rendered

0.6% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 1.21 s 1.23 s ↓ -21 ms (-1.7%) 1.21 s 1.33 s
CLS Cumulative Layout Shift 0 0 → no change 0 0
TBT Total Blocking Time 4 ms 28 ms ↓ -24 ms (-85.7%) 0 ms 64 ms
FCP First Contentful Paint 1.06 s 1.16 s ↓ -99 ms (-8.6%) 1.06 s 1.33 s
Speed Index 1.06 s 1.16 s ↓ -99 ms (-8.6%) 1.06 s 1.33 s
TTFB Time to First Byte 608 ms 629 ms ↓ -21 ms (-3.3%) 608 ms 649 ms

LCP Subparts lab observed, unthrottled

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

element render delay 68 ms
resource load delay 16 ms
resource load duration 10 ms
time to first byte 4 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-08-06 → 2026-09-02).

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 1.03 s good 94% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 89 ms good 93.7% good
CLS CWV 0 good 93.1% good
FCP 1.03 s good 90.2% good
TTFB 543 ms good 86.7% good

Lab LCP vs Field LCP

Lab 1.21 s
Field p75 1.03 s

The lab LCP is 1.17× the field p75 — real users likely have above-average hardware or network connectivity.

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-08-29 1.02 s 87 ms 0 1.03 s 528 ms
2026-08-22 984 ms 93 ms 0 986 ms 514 ms
2026-08-15 1.07 s 88 ms 0 1.07 s 560 ms
2026-08-08 1.10 s 88 ms 0 1.10 s 527 ms
2026-08-01 1.18 s 89 ms 0 1.16 s 593 ms
2026-07-25 1.21 s 93 ms 0 1.19 s 607 ms
2026-07-18 1.19 s 96 ms 0 1.19 s 607 ms
2026-07-11 1.18 s 97 ms 0 1.17 s 604 ms
2026-07-04 1.13 s 95 ms 0 1.14 s 573 ms
2026-06-27 1.10 s 89 ms 0 1.06 s 558 ms
2026-06-20 1.06 s 87 ms 0 994 ms 506 ms
2026-06-13 1.13 s 91 ms 0 953 ms 532 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 92.1 kB 92.2 kB ↓ -33 B 92.1 kB 175 kB
Requests 11 11 → no change 11 54
Third-party Weight 0 B 0 B → no change 0 B 0 B
Third-party CPU 0 ms 0 ms → no change 0 ms 0 ms
Unused JS 0 B 0 B → no change 0 B 0 B
Unused CSS 0 B 0 B → no change 0 B 0 B

By resource type

  • document 43% 39.6 kB · 1 req
  • font 23.8% 21.9 kB · 2 req
  • script 18% 16.6 kB · 3 req
  • stylesheet 10.2% 9.4 kB · 1 req
  • image 3.2% 3.0 kB · 1 req
  • other 1.9% 1.7 kB · 1 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 547 ms 444 ms ↑ +102 ms (+23%) 444 ms 935 ms
Long Tasks 2 2 → no change 1 3
DOM Elements 1,480 1,480 → no change 1,480 1,541
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 0 → no change 0 0
A11y Failures 0 0 → no change 0 0
A11y Failing Nodes 0 0 → no change 0 0

Main thread work

style layout 254 ms
other 133 ms
script evaluation 70 ms
paint composite render 47 ms
parse HTML 41 ms
script parse compile 2 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 2293 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook
Sep 5, 2026, 3:09 AM UTC 100 1.21 s 0 4 ms 92.1 kB 3/3 ±1 2,445 -1% 34s
Sep 3, 2026, 10:24 PM UTC 100 1.23 s 0 28 ms 92.2 kB 3/3 ±0 2,958 +19% 28.6s
Sep 2, 2026, 8:49 PM UTC 100 1.24 s 0 20 ms 92.1 kB 3/3 ±0 2,445 -1% 32.2s
Sep 1, 2026, 8:39 PM UTC 100 1.25 s 0 14 ms 92.1 kB 3/3 ±0 2,301 -7% 32.7s
Aug 31, 2026, 5:57 PM UTC 100 1.22 s 0 64 ms 92.3 kB 3/3 ±0 2,443 -1% 32.2s
Aug 27, 2026, 4:15 AM UTC 100 1.23 s 0 19 ms 101 kB 3/3 ±12 2,625 +6% 37.6s
Aug 25, 2026, 11:24 PM UTC 100 1.24 s 0 7 ms 92.4 kB 3/3 ±18 2,496 +1% 35.2s
Aug 25, 2026, 9:20 PM UTC 100 1.22 s 0 20 ms 101 kB 3/3 ±0 2,313 -7% 32.5s
Aug 25, 2026, 7:33 PM UTC 100 1.33 s 0 0 ms 92.3 kB 3/3 ±17 2,338 -6% 33.1s
Aug 24, 2026, 7:28 PM UTC 100 1.23 s 0 21 ms 101 kB 3/3 ±18 2,463 -1% 36.9s
Aug 23, 2026, 7:21 PM UTC 100 1.29 s 0 8 ms 167 kB 3/3 ±5 3,010 +21% 34.8s
Aug 22, 2026, 6:28 PM UTC 100 1.25 s 0 36 ms 175 kB 3/3 ±10 2,370 -4% 40.5s
Aug 21, 2026, 5:28 PM UTC 100 1.21 s 0 9 ms 92.2 kB 3/3 ±1 2,471 0% 35.5s

Embed this score

Use this web component to show 11ty.dev's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site! 

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://www.11ty.dev/"></speedlify2-score>