slay.sh
Data from Aug 21, 2026, 6:49 AM UTC — 12h old.
Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 12h
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 | 2.87 s | — | — | 2.87 s | 2.87 s | |
| CLS Cumulative Layout Shift | 0.005 | — | — | 0.005 | 0.005 | |
| TBT Total Blocking Time | 0 ms | — | — | 0 ms | 0 ms | |
| FCP First Contentful Paint | 2.26 s | — | — | 2.26 s | 2.26 s | |
| Speed Index | 2.26 s | — | — | 2.26 s | 2.26 s | |
| TTFB Time to First Byte | 606 ms | — | — | 606 ms | 606 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.
Page weight
| Metric | Current | Previous | Change | Best | Worst | Trend |
|---|---|---|---|---|---|---|
| Page Weight | 221.5 kB | — | — | 221.5 kB | 221.5 kB | |
| Requests | 15 | — | — | 15 | 15 | |
| Third-party Weight | 71.8 kB | — | — | 71.8 kB | 71.8 kB | |
| Third-party CPU | 31 ms | — | — | 31 ms | 31 ms | |
| Unused JS | 0 B | — | — | 0 B | 0 B | |
| Unused CSS | 0 B | — | — | 0 B | 0 B |
By resource type
Third parties 3 entities
71.8 kB transferred, 31 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 | 486 ms | — | — | 486 ms | 486 ms | |
| Long Tasks | 1 | — | — | 1 | 1 | |
| DOM Elements | 149 | — | — | 149 | 149 | |
| Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset | 6 | — | — | 6 | 6 | |
| A11y Failures | 1 | — | — | 1 | 1 | |
| A11y Failing Nodes | 1 | — | — | 1 | 1 |
Main thread work
Axe violations axe-core 4.13.0, full rule set
6 violating nodes across 4 rules, 266 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.
-
moderate
page-has-heading-one— Page should contain a level-one heading 2 nodes -
serious
scrollable-region-focusable— Scrollable region must have keyboard access 2 nodes -
serious
color-contrast— Elements must meet minimum color contrast ratio thresholds 1 node -
moderate
region— All page content should be contained by landmarks 1 node
Accessibility failures 1 of 24 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.
-
color-contrast— Background and foreground colors do not have a sufficient contrast ratio. 1 node
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 21, 2026, 6:49 AM UTC | 93 | 2.87 s | 0.005 | 0 ms | 221.5 kB | 3/3 | ±4 | 2,478 | 24.9s |
Embed this score
Live below, then the markup that produces it. Drop that on any page to show
slay.sh'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://slay.sh/"></speedlify-score>