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 ·

vtcodecamp.org

https://www.vtcodecamp.org/

95 95 100 100 –CWV 0AXE

Data from Aug 21, 2026, 12:47 PM UTC — 6h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 6h

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.

Netlify Hosted by Netlify

Scores

95
Performance
no change
95
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 2.75 s — — 2.75 s 2.75 s
CLS Cumulative Layout Shift 0.007 — — 0.007 0.007
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 1.64 s — — 1.64 s 1.64 s
Speed Index 1.64 s — — 1.64 s 1.64 s
TTFB Time to First Byte 631 ms — — 631 ms 631 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 124 ms
time to first byte 37 ms
resource load duration 20 ms
resource load delay 10 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 171.7 kB — — 171.7 kB 171.7 kB
Requests 5 — — 5 5
Third-party Weight 163.7 kB — — 163.7 kB 163.7 kB
Third-party CPU 0 ms — — 0 ms 0 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 0 B — — 0 B 0 B

By resource type

image 150.4 kB · 1 req
font 12.6 kB · 1 req
document 7.1 kB · 1 req
stylesheet 777 B · 1 req
third party 163.7 kB · 3 req

Third parties 2 entities

163.7 kB transferred, 0 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

cloudfront.net 150.4 kB · 0 ms CPU
Google Fonts 13.4 kB · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 135 ms — — 135 ms 135 ms
Long Tasks 0 — — 0 0
DOM Elements 137 — — 137 137
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 0 — — 0 0
A11y Failures 1 — — 1 1
A11y Failing Nodes 1 — — 1 1

Main thread work

other 79 ms
style layout 28 ms
script evaluation 10 ms
parse HTML 9 ms
paint composite render 7 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 248 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.

Accessibility failures 1 of 19 audits

Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.

  • aria-hidden-focus — `[aria-hidden="true"]` elements contain focusable descendents 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, 12:47 PM UTC 95 2.75 s 0.007 0 ms 171.7 kB 3/3 ±5 2,352 22.3s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show vtcodecamp.org'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.vtcodecamp.org/"></speedlify-score>