speedlify.dev
Data from Aug 23, 2026, 7:21 PM UTC 2h old
Built Awesome #223 · 3 measurements · since Aug 21, 2026
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.
Scores
Lab metrics Lighthouse, mobile
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| LCP Largest Contentful Paint | 1.28 s | 1.28 s | ↑ +1 ms (+0.1%) | 793 ms | 1.28 s | |
| CLS Cumulative Layout Shift | 0 | 0 | → no change | 0 | 0 | |
| TBT Total Blocking Time | 189 ms | 120 ms | ↑ +69 ms (+57.5%) | 0 ms | 189 ms | |
| FCP First Contentful Paint | 1.20 s | 1.20 s | ↑ +1 ms (+0.1%) | 793 ms | 1.20 s | |
| Speed Index | 1.20 s | 1.20 s | ↑ +1 ms (+0.1%) | 793 ms | 1.20 s | |
| TTFB Time to First Byte | 603 ms | 602 ms | ↑ +1 ms (+0.2%) | 602 ms | 633 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.
Page weight
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Page Weight | 181 kB | 183 kB | ↓ -2.0 kB (-1.1%) | 50.4 kB | 183 kB | |
| Requests | 25 | 27 | ↓ -2 (-7.4%) | 4 | 27 | |
| Third-party Weight | 100 kB | 102 kB | ↓ -2.0 kB (-2%) | 0 B | 102 kB | |
| Third-party CPU | 0 ms | 0 ms | → no change | 0 ms | 0 ms | |
| Unused JS | 0 B | 0 B | → no change | 0 B | 21.3 kB | |
| Unused CSS | 12.2 kB | 12.0 kB | ↑ +224 B (+1.9%) | 0 B | 12.2 kB |
By resource type
Third parties 1 entities
100 kB transferred, 0 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.
Page health
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Main Thread Work | 1.44 s | 1.18 s | ↑ +266 ms (+22.6%) | 121 ms | 1.44 s | |
| Long Tasks | 6 | 5 | ↑ +1 (+20%) | 0 | 6 | |
| DOM Elements | 10,690 | 10,790 | ↓ -100 (-0.9%) | 64 | 10,790 | |
| Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset | 0 | 0 | → no change | 0 | 0 | |
| A11y Failures | 0 | 1 | ↓ -1 (-100%) | 0 | 1 | |
| A11y Failing Nodes | 0 | 10 | ↓ -10 (-100%) | 0 | 10 |
Main thread work
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 26885 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.
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 | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took |
|---|---|---|---|---|---|---|---|---|---|
| Aug 23, 2026, 7:21 PM UTC | 97 | 1.28 s | 0 | 189 ms | 181 kB | 3/3 | ±7 | 2,386 | 58.5s |
| Aug 23, 2026, 5:19 PM UTC | 99 | 1.28 s | 0 | 120 ms | 183 kB | 3/3 | ±7 | 2,486 | 56.3s |
| Aug 21, 2026, 1:55 PM UTC | 100 | 793 ms | 0 | 0 ms | 50.4 kB | 3/3 | ±0 | 2,502 | 21.8s |
Embed this score
Live below, then the markup that produces it. Drop that on any page to show
speedlify.dev'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://www.speedlify.dev/"></speedlify2-score>