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 ·

ujjwal.dev

https://ujjwal.dev/

Data from Aug 21, 2026, 9:47 AM UTC — 8h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 8h

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.

Vercel Hosted by Vercel

Scores

100
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 1.52 s 1.52 s 1.52 s
CLS Cumulative Layout Shift 0 0 0
TBT Total Blocking Time 0 ms 0 ms 0 ms
FCP First Contentful Paint 768 ms 768 ms 768 ms
Speed Index 768 ms 768 ms 768 ms
TTFB Time to First Byte 609 ms 609 ms 609 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 43 ms
time to first byte 4 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 5.6 kB 5.6 kB 5.6 kB
Requests 5 5 5
Third-party Weight 3.3 kB 3.3 kB 3.3 kB
Third-party CPU 3 ms 3 ms 3 ms
Unused JS 0 B 0 B 0 B
Unused CSS 0 B 0 B 0 B

By resource type

script 2.7 kB · 1 req
document 1.5 kB · 1 req
stylesheet 745 B · 1 req
other 647 B · 2 req
third party 3.3 kB · 3 req

Third parties 1 entities

3.3 kB transferred, 3 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

umami.is 3.3 kB · 3 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 101 ms 101 ms 101 ms
Long Tasks 0 0 0
DOM Elements 16 16 16
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 0 0 0
A11y Failures 0 0 0
A11y Failing Nodes 0 0 0

Main thread work

other 62 ms
script evaluation 20 ms
style layout 11 ms
parse HTML 4 ms
script parse compile 2 ms
paint composite render 2 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 50 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.

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, 9:47 AM UTC 100 1.52 s 0 0 ms 5.6 kB 3/3 ±0 2,477 20.6s

Embed this score

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