guides.18f.org
Ranks Overall #889 Built Awesome #649
Data from Oct 3, 2026, 11:36 PM UTC old Measured once a week · 7 runs since Aug 20, 2026
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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 | 4.23 s poor | ↓ -147 ms (-3.4%) 3.95 s – 4.38 s | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | |
| CLS CWV (estimate) Cumulative Layout Shift | 0.444 poor | → no change 0.124 – 0.461 | |
| TBT Total Blocking Time | 4 ms good | → no change 0 ms – 4 ms | |
| FCP First Contentful Paint | 3.78 s poor | ↓ -147 ms (-3.7%) 3.65 s – 3.95 s | |
| Speed Index | 3.78 s needs work | ↓ -147 ms (-3.7%) 3.65 s – 3.95 s | |
| TTFB Time to First Byte | 464 ms good | ↑ +1 ms (+0.2%) 463 ms – 615 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 | 565 kB | ↓ -47 B 565 kB – 568 kB | |
| Requests | 21 | → no change 21 – 21 | |
| Third-party Weight | 11.5 kB | ↑ +1 B 10.9 kB – 12.9 kB | |
| Third-party CPU | 5 ms | ↑ +1 ms (+23.3%) 4 ms – 7 ms | |
| Unused JS | 0 B | → no change 0 B – 0 B | |
| Unused CSS | 458 kB | ↓ -29 B 458 kB – 458 kB |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| stylesheet | 82.2% | 463 kB | 2 | |
| image | 9.6% | 53.9 kB | 12 | |
| script | 7.4% | 41.7 kB | 3 | |
| document | 0.8% | 4.3 kB | 1 | |
| other | 0.1% | 483 B | 1 | |
| Total | 565 kB | 21 |
Third parties 2 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Cloudflare | 10.2 kB | 5 ms | |
| Unpkg | 1.3 kB | 0 ms | |
| Total | 11.5 kB | 5 ms |
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 457 ms | ↓ -9 ms (-1.8%) 410 ms – 489 ms | |
| Long Tasks | 1 | → no change 1 – 1 | |
| DOM Elements | 117 | → no change 117 – 117 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 0 | → no change 0 – 0 | |
| A11y Failures | 0 | → no change 0 – 0 | |
| A11y Failing Nodes | 0 | → no change 0 – 0 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| other | 42% | 190 ms | |
| script evaluation | 25% | 114 ms | |
| style layout | 15% | 67 ms | |
| parse HTML | 11% | 51 ms | |
| paint composite render | 4% | 18 ms | |
| script parse compile | 4% | 18 ms | |
| Total | 457 ms |
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 240 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
SEO failures 3 of 10 audits
-
meta-description— Document does not have a meta description -
robots-txt— robots.txt is not valid 1 item -
canonical— Document does not have a valid `rel=canonical`
Hygiene
Measurement log
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 3, 2026, 11:36 PM UTC | 57 | 4.23 s | 0.444 | 4 ms | 565 kB | 3/3 | ±10 | 2,483 0% | 24.6s |
|
|
| Sep 26, 2026, 9:56 PM UTC | 56 | 4.38 s | 0.444 | 4 ms | 565 kB | 3/3 | ±3 | 2,490 0% | 24.7s |
|
|
| Sep 19, 2026, 7:15 PM UTC | 58 | 4.08 s | 0.444 | 2 ms | 565 kB | 3/3 | ±11 | 2,491 0% | 24.4s |
|
|
| Sep 12, 2026, 6:11 PM UTC | 73 | 4.23 s | 0.124 | 2 ms | 565 kB | 3/3 | ±7 | 2,497 0% | 22.5s |
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| Sep 5, 2026, 3:52 PM UTC | 75 | 3.95 s | 0.124 | 3 ms | 565 kB | 3/3 | ±11 | 2,458 -1% | 24.6s |
|
|
| Aug 29, 2026, 12:28 PM UTC | 58 | 4.02 s | 0.461 | 0 ms | 565 kB | 3/3 | ±1 | 2,339 -6% | 22.8s |
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| Aug 20, 2026, 10:34 PM UTC | 57 | 4.11 s | 0.461 | 4 ms | 568 kB | 3/3 | ±1 | 2,295 -8% | 22.8s |
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Embed this score
Use this web component to show guides.18f.org'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://guides.18f.org/"></speedlify2-score>