speedlify2

Personal instance of speedlify2 for Paul Kinchla's personal projects. Created by @zachleat.

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 ·

paulkinchla.com/blog/2020/10/28/javascript-still-a-ghost

https://paulkinchla.com/blog/2020/10/28/javascript-still-a-ghost

98 100 100 100 ✓AXE –CWV

Data from Aug 25, 2026, 5:48 PM UTC 7h old

Overall #1 paulkinchla.com #1 · 3 measurements · since Jul 7, 2026

This URL redirects to https://paulkinchla.com/blog/2020/10/28/javascript-still-a-ghost/.

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.

WordPress 7.0.4 Built with WordPress 7.0.4
Cloudflare Hosted by Cloudflare

Scores

98
Performance
↑ +1 (+1%)
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

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 2.27 s 2.60 s ↓ -330 ms (-12.7%) 2.27 s 2.60 s
CLS Cumulative Layout Shift 0 0.002 ↓ -0.002 (-100%) 0 0.004
TBT Total Blocking Time 24 ms 11 ms ↑ +13 ms (+118.2%) 5 ms 24 ms
FCP First Contentful Paint 1.15 s 1.54 s ↓ -394 ms (-25.5%) 1.15 s 1.54 s
Speed Index 1.15 s 1.54 s ↓ -394 ms (-25.5%) 1.15 s 1.54 s
TTFB Time to First Byte 465 ms 465 ms → no change 59 ms 465 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 2.27 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 117 ms
time to first byte 32 ms
resource load duration 20 ms
resource load delay 11 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 216 kB 216 kB ↓ -488 B (-0.2%) 216 kB 217 kB
Requests 11 11 → no change 10 11
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

font 163 kB · 3 req
document 27.7 kB · 1 req
script 19.9 kB · 2 req
image 3.5 kB · 1 req
other 1.2 kB · 3 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 522 ms 655 ms ↓ -133 ms (-20.3%) 522 ms 655 ms
Long Tasks 2 3 ↓ -1 (-33.3%) 2 3
DOM Elements 766 766 → no change 766 766
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 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 222 ms
other 138 ms
script evaluation 110 ms
parse HTML 35 ms
paint composite render 16 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 1127 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 25, 2026, 5:48 PM UTC 98 2.27 s 0 24 ms 216 kB 3/3 ±3 2,506 +4% 29.7s
Aug 25, 2026, 5:21 PM UTC 97 2.60 s 0.002 11 ms 216 kB 1/1 — 2,404 9.5s
Jul 7, 2026, 3:58 PM UTC 97 2.44 s 0.004 5 ms 217 kB 3/3 — — 0s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show paulkinchla.com/blog/2020/10/28/javascript-still-a-ghost'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://paulkinchla.com/blog/2020/10/28/javascript-still-a-ghost"></speedlify2-score>