system76.com/tech-docs
https://system76.com/tech-docs
Ranks Overall #442 Astro Showcase #15
Data from Oct 2, 2026, 1:47 PM UTC old Measured once a month · 1 run since Oct 2, 2026
Elsewhere:
PageSpeed Insights ·
Calibre ·
Treo ·
CrUX Vis ·
Tame the Bots ·
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 FIELD
Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-02 → 2026-09-29), origin-level.
| Metric | Lab Simulated | Field | |||
|---|---|---|---|---|---|
| Value | Change / range | Trend | p75 | Distribution | |
| LCP CWV Largest Contentful Paint | 3.45 s needs work | — 3.45 s – 3.45 s | 1.94 s good | 85.3% 9.7% 5% | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | 94 ms good | 94.9% 4.4% 0.8% | |
| CLS CWV Cumulative Layout Shift | 0 good | — 0 – 0 | 0 good | 96.6% 1.7% 1.7% | |
| TBT Total Blocking Time | 97 ms good | — 97 ms – 97 ms | n/a | — | |
| FCP First Contentful Paint | 1.54 s good | — 1.54 s – 1.54 s | 1.88 s needs work | 73% 18.1% 8.9% | |
| Speed Index | 1.54 s good | — 1.54 s – 1.54 s | n/a | — | |
| TTFB Time to First Byte | 613 ms good | — 613 ms – 613 ms | 1.24 s needs work | 42.2% 47.3% 10.5% | |
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.
LCP LAB Simulated vs LCP FIELD
The lab LCP is 1.78× the field p75 — real users likely have above-average hardware or network connectivity.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 455 kB | — 455 kB – 455 kB | |
| Requests | 12 | — 12 – 12 | |
| Third-party Weight | 197 kB | — 197 kB – 197 kB | |
| Third-party CPU | 65 ms | — 65 ms – 65 ms | |
| Unused JS | 79.0 kB | — 79.0 kB – 79.0 kB | |
| Unused CSS | 0 B | — 0 B – 0 B |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| script | 49.4% | 225 kB | 4 | |
| document | 32.5% | 148 kB | 1 | |
| font | 10.9% | 49.6 kB | 2 | |
| stylesheet | 2.8% | 12.8 kB | 2 | |
| image | 2.7% | 12.3 kB | 2 | |
| other | 1.7% | 7.7 kB | 1 | |
| Total | 455 kB | 12 |
Third parties 1 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Google Tag Manager | 197 kB | 65 ms | |
| Total | 197 kB | 65 ms |
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 532 ms | — 532 ms – 532 ms | |
| Long Tasks | 2 | — 2 – 2 | |
| DOM Elements | 2,063 | — 2,063 – 2,063 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 0 | — 0 – 0 | |
| A11y Failures | 0 | — 0 – 0 | |
| A11y Failing Nodes | 0 | — 0 – 0 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| script evaluation | 50% | 265 ms | |
| other | 26% | 138 ms | |
| script parse compile | 9% | 50 ms | |
| parse HTML | 7% | 40 ms | |
| style layout | 6% | 33 ms | |
| paint composite render | 1% | 7 ms | |
| Total | 532 ms |
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 371 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
SEO failures 1 of 10 audits
-
meta-description— Document does not have a meta description
Hygiene
Measurement log
Field history 25 weeks
Weekly p75 from the CrUX History API, backfilled in a single request.
| Week ending | LCP | INP | CLS | FCP | TTFB |
|---|---|---|---|---|---|
| 2026-09-26 | 1.93 s | 94 ms | 0 | 1.86 s | 1.23 s |
| 2026-09-19 | 1.91 s | 93 ms | 0 | 1.84 s | 1.21 s |
| 2026-09-12 | 1.88 s | 92 ms | 0 | 1.81 s | 1.20 s |
| 2026-09-05 | 1.86 s | 91 ms | 0 | 1.80 s | 1.18 s |
| 2026-08-29 | 1.85 s | 91 ms | 0 | 1.79 s | 1.18 s |
| 2026-08-22 | 1.84 s | 91 ms | 0 | 1.78 s | 1.17 s |
| 2026-08-15 | 1.83 s | 92 ms | 0 | 1.77 s | 1.15 s |
| 2026-08-08 | 1.81 s | 92 ms | 0 | 1.75 s | 1.13 s |
| 2026-08-01 | 1.80 s | 92 ms | 0 | 1.74 s | 1.12 s |
| 2026-07-25 | 1.77 s | 91 ms | 0 | 1.71 s | 1.10 s |
| 2026-07-18 | 1.78 s | 91 ms | 0 | 1.71 s | 1.10 s |
| 2026-07-11 | 1.77 s | 92 ms | 0 | 1.71 s | 1.10 s |
Runs
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2, 2026, 1:47 PM UTC | 90 | 3.45 s | 0 | 97 ms | 455 kB | 3/3 | ±13 | 2,659 +7% | 25.9s |
|