speedlify2

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

Measurement runs · Embed a score · Field data from the Chrome UX Report ·

spencerharston.com

https://www.spencerharston.com/

88 100 100 100 –CWV 5AXE

Data from Aug 21, 2026, 2:36 PM UTC — 4h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 4h

Stack

Detected on the same page load as the accessibility pass — the generator from <meta name="generator"> or the shape of the page, the host from response headers.

Eleventy 3.0.0 Built with Eleventy 3.0.0
Cloudflare Hosted by Cloudflare

Scores

88
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 1.57 s — — 1.57 s 1.57 s
CLS Cumulative Layout Shift 0.238 — — 0.238 0.238
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 817 ms — — 817 ms 817 ms
Speed Index 817 ms — — 817 ms 817 ms
TTFB Time to First Byte 643 ms — — 643 ms 643 ms

What LCP is made of

A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.

element render delay 177 ms
time to first byte 69 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 46.5 kB — — 46.5 kB 46.5 kB
Requests 12 — — 12 12
Third-party Weight 11.9 kB — — 11.9 kB 11.9 kB
Third-party CPU 2 ms — — 2 ms 2 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 0 B — — 0 B 0 B

By resource type

font 17.1 kB · 1 req
script 8.2 kB · 3 req
stylesheet 7.3 kB · 3 req
image 6.4 kB · 1 req
other 4.4 kB · 3 req
document 3.1 kB · 1 req
third party 11.9 kB · 4 req

Third parties 4 entities

11.9 kB transferred, 2 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Fastly 6.4 kB · 0 ms CPU
zgo.at 4.4 kB · 2 ms CPU
workers.dev 824 B · 0 ms CPU
goatcounter.com 379 B · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 196 ms — — 196 ms 196 ms
Long Tasks 0 — — 0 0
DOM Elements 94 — — 94 94
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 5 — — 5 5
A11y Failures 0 — — 0 0
A11y Failing Nodes 0 — — 0 0

Main thread work

other 90 ms
style layout 55 ms
script evaluation 27 ms
parse HTML 10 ms
paint composite render 9 ms
script parse compile 5 ms

Axe violations axe-core 4.13.0, full rule set

5 violating nodes across 2 rules, 203 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.

  • minor aria-allowed-role — ARIA role should be appropriate for the element 4 nodes
  • moderate page-has-heading-one — Page should contain a level-one heading 1 node

Hygiene

Changes rarely — which is exactly why a change is worth noticing.

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.

When PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 21, 2026, 2:36 PM UTC 88 1.57 s 0.238 0 ms 46.5 kB 3/3 ±7 2,330 22.7s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show spencerharston.com's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify-score.js component code into your site! 

<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://www.spencerharston.com/"></speedlify-score>