nejsconf.com
Ranks Overall #425 Built Awesome #344 zachleat #16
Data from Sep 9, 2026, 5:35 PM UTC old Measured once a week · 4 runs since Aug 21, 2026
Elsewhere:
PageSpeed Insights ·
Calibre ·
Treo ·
CrUX Vis ·
Scoring Calculator ·
Wayback Machine
Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).
Stack
Lighthouse Scores LAB Simulated
Metrics LAB
No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.
| Metric | Lab Simulated | ||
|---|---|---|---|
| Value | Change / range | Trend | |
| LCP CWV (estimate) Largest Contentful Paint | 1.52 s good | ↑ +10 ms (+0.7%) 1.51 s – 1.53 s | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | |
| CLS CWV (estimate) Cumulative Layout Shift | 0.005 good | → no change 0.005 – 0.005 | |
| TBT Total Blocking Time | 0 ms good | → no change 0 ms – 0 ms | |
| FCP First Contentful Paint | 789 ms good | ↑ +4 ms (+0.5%) 782 ms – 803 ms | |
| Speed Index | 789 ms good | ↑ +4 ms (+0.5%) 782 ms – 803 ms | |
| TTFB Time to First Byte | 612 ms good | ↑ +6 ms (+1%) 606 ms – 625 ms | |
LCP Subparts LAB Unthrottled
The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 236 kB | ↓ -15 B 236 kB – 237 kB | |
| Requests | 56 | → no change 56 – 56 | |
| Third-party Weight | 84.6 kB | ↑ +1 B 84.6 kB – 84.6 kB | |
| Third-party CPU | 1 ms | ↓ -1 ms (-29.4%) 1 ms – 2 ms | |
| Unused JS | 0 B | → no change 0 B – 0 B | |
| Unused CSS | 0 B | → no change 0 B – 0 B |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| image | 63.1% | 149 kB | 49 | |
| font | 32.8% | 77.4 kB | 3 | |
| script | 2.9% | 7.0 kB | 1 | |
| document | 0.8% | 1.8 kB | 1 | |
| stylesheet | 0.4% | 1.0 kB | 2 | |
| Total | 236 kB | 56 |
Third parties 1 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Adobe TypeKit | 84.6 kB | 1 ms | |
| Total | 84.6 kB | 1 ms |
Without JavaScript
The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.
16.6% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 374 ms | ↓ -3 ms (-0.7%) 352 ms – 377 ms | |
| Long Tasks | 0 | → no change 0 – 0 | |
| DOM Elements | 122 | → no change 121 – 122 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 0 | → no change 0 – 8 | |
| A11y Failures | 0 | → no change 0 – 1 | |
| A11y Failing Nodes | 0 | → no change 0 – 1 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| other | 60% | 225 ms | |
| script evaluation | 17% | 65 ms | |
| style layout | 12% | 46 ms | |
| paint composite render | 8% | 30 ms | |
| parse HTML | 1% | 5 ms | |
| script parse compile | 1% | 4 ms | |
| Total | 374 ms |
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 348 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
Hygiene
Measurement log
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 9, 2026, 5:35 PM UTC | 100 | 1.52 s | 0.005 | 0 ms | 236 kB | 3/3 | ±0 | 2,352 -5% | 26.7s |
|
|
| Sep 2, 2026, 3:48 PM UTC | 100 | 1.51 s | 0.005 | 0 ms | 236 kB | 3/3 | ±4 | 2,345 -6% | 29.4s |
|
|
| Aug 29, 2026, 10:25 PM UTC | 100 | 1.53 s | 0.005 | 0 ms | 237 kB | 3/3 | ±0 | 2,479 0% | 22.2s |
|
|
| Aug 21, 2026, 5:38 AM UTC | 100 | 1.51 s | 0.005 | 0 ms | 237 kB | 3/3 | ±7 | 2,454 -1% | 23.8s |
|
Embed this score
Use this web component to show nejsconf.com's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site!
<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://nejsconf.com/"></speedlify2-score>