speedlify2

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

Measurement runs · Embed a score ·

mandrasch.github.io/11ty-plain-bootstrap5

https://mandrasch.github.io/11ty-plain-bootstrap5

100 100 100 100 0AXE –CWV

Data from Aug 21, 2026, 3:12 AM UTC 2d old

Build Awesome Starters #2 · 1 measurement · since Aug 21, 2026

This URL redirects to https://mandrasch.github.io/11ty-plain-bootstrap5/.

A trailing slash only, so both forms are treated as one site rather than two — one history, measured once. Lighthouse follows the redirect, so the numbers below describe the canonical page; the only cost is an extra hop on each run.

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.

GitHub Pages Hosted by GitHub Pages

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 1.28 s — — 1.28 s 1.28 s
CLS Cumulative Layout Shift 0 — — 0 0
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 1.20 s — — 1.20 s 1.20 s
Speed Index 1.20 s — — 1.20 s 1.20 s
TTFB Time to First Byte 603 ms — — 603 ms 603 ms

What LCP is made of observed, unthrottled

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

Measured on the trace before throttling is modelled, so these are real durations that will not sum to the 1.28 s above — that figure is a simulation of the same load on a slow phone and connection. Read these for the proportions: which phase dominates.

element render delay 46 ms
time to first byte 9 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 224 kB — — 224 kB 224 kB
Requests 7 — — 7 7
Third-party Weight 0 B — — 0 B 0 B
Third-party CPU 0 ms — — 0 ms 0 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 28.7 kB — — 28.7 kB 28.7 kB

By resource type

image 159 kB · 1 req
stylesheet 30.7 kB · 1 req
script 24.0 kB · 1 req
document 4.8 kB · 1 req
other 256 B · 1 req
third party 219 kB · 5 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 161 ms — — 161 ms 161 ms
Long Tasks 0 — — 0 0
DOM Elements 104 — — 104 104
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 85 ms
style layout 26 ms
script evaluation 23 ms
parse HTML 14 ms
script parse compile 8 ms
paint composite render 6 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 167 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, 3:12 AM UTC 100 1.28 s 0 0 ms 224 kB 3/3 ±0 2,308 20.8s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show mandrasch.github.io/11ty-plain-bootstrap5's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify2-score.js component code into your site! 

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://mandrasch.github.io/11ty-plain-bootstrap5"></speedlify2-score>