vitepress.dev

Ranks Overall #772 Developer Tooling #13 Site Generators #5

Data from Oct 7, 2026, 5:38 PM UTC 15h old Measured every 2 days · 25 runs since Aug 21, 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

Built with VitePress 2.0.0

Uses Vue 3.5.43

Hosted by Netlify

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.

375 ms
750 ms
1.13 s
1.50 s
1.88 s
2.25 s
2.63 s
3.00 s

Lighthouse Scores LAB Simulated

Performance

no change

Accessibility

no change

100

Best Practices

no change

100

SEO

no change

Metrics LAB FIELD

Core Web Vitals: passing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-08 → 2026-10-05), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	2.33 s good	↓ -19 ms (-0.8%) 2.33 s – 2.48 s	1.35 s good	93.1% 3.8% 3.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	116 ms good	90% 9.2% 0.7%
CLS CWV Cumulative Layout Shift	0 good	→ no change 0 – 0	0 good	98.9% 0.8% 0.4%
TBT Total Blocking Time	21 ms good	↑ +1 ms (+5%) 5 ms – 33 ms	n/a	—
FCP First Contentful Paint	1.51 s good	↓ -19 ms (-1.2%) 1.35 s – 1.54 s	1.31 s good	84.6% 10.8% 4.6%
Speed Index	1.51 s good	↓ -19 ms (-1.2%) 1.35 s – 1.54 s	n/a	—
TTFB Time to First Byte	607 ms good	↓ -19 ms (-3%) 604 ms – 657 ms	557 ms good	84.4% 12.7% 2.9%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

2.33 s good

↓ -19 ms (-0.8%) 2.33 s – 2.48 s

1.35 s good

93.1% 3.8% 3.1%

INP CWV Interaction to Next Paint — field only, no lab run can measure it

n/a

—

116 ms good

90% 9.2% 0.7%

CLS CWV Cumulative Layout Shift

0 good

→ no change 0 – 0

0 good

98.9% 0.8% 0.4%

TBT Total Blocking Time

21 ms good

↑ +1 ms (+5%) 5 ms – 33 ms

n/a

—

FCP First Contentful Paint

1.51 s good

↓ -19 ms (-1.2%) 1.35 s – 1.54 s

1.31 s good

84.6% 10.8% 4.6%

Speed Index

1.51 s good

↓ -19 ms (-1.2%) 1.35 s – 1.54 s

n/a

—

TTFB Time to First Byte

607 ms good

↓ -19 ms (-3%) 604 ms – 657 ms

557 ms good

84.4% 12.7% 2.9%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

resource load duration 1.24 s

time to first byte 570 ms

element render delay 262 ms

resource load delay 37 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.33 s

Field p75 1.35 s

The lab LCP is 1.72× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	211 kB	↑ +145 B (+0.1%) 210 kB – 212 kB
Requests	23	→ no change 23 – 23
Third-party Weight	3.2 kB	↑ +1 B 3.2 kB – 3.2 kB
Third-party CPU	1 ms	→ no change 1 ms – 2 ms
Unused JS	0 B	→ no change 0 B – 0 B
Unused CSS	19.1 kB	↑ +47 B (+0.2%) 19.1 kB – 20.8 kB

Metric

Value

Change / range

Trend

Page Weight

211 kB

↑ +145 B (+0.1%) 210 kB – 212 kB

Requests

→ no change 23 – 23

Third-party Weight

3.2 kB

↑ +1 B 3.2 kB – 3.2 kB

Third-party CPU

1 ms

→ no change 1 ms – 2 ms

Unused JS

0 B

→ no change 0 B – 0 B

Unused CSS

19.1 kB

↑ +47 B (+0.2%) 19.1 kB – 20.8 kB

By resource type

Type	Share	Size	Requests
script	39.3%	83.2 kB	6
font	34.6%	73.1 kB	1
stylesheet	18.2%	38.5 kB	2
other	4.6%	9.8 kB	4
image	1.6%	3.4 kB	3
document	1.6%	3.4 kB	1
Total		211 kB	23

Third parties 1 entities

Entity	Transfer	Size	Main thread Simulated
Fathom Analytics	script	3.2 kB	1 ms
Total		3.2 kB	1 ms

Entity

Transfer

Size

Main thread Simulated

Fathom Analytics

script

3.2 kB

1 ms

Total

3.2 kB

1 ms

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

0% of pixels differ — they are identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric	Value	Change / range
Main Thread Work	636 ms	↑ +85 ms (+15.4%) 389 ms – 636 ms
Long Tasks	2	→ no change 1 – 2
DOM Elements	170	→ no change 159 – 204
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	4	→ no change 4 – 4
A11y Failures	2	→ no change 2 – 2
A11y Failing Nodes	2	→ no change 2 – 2

Metric

Value

Change / range

Trend

Main Thread Work

636 ms

↑ +85 ms (+15.4%) 389 ms – 636 ms

Long Tasks

→ no change 1 – 2

DOM Elements

170

→ no change 159 – 204

Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)

→ no change 4 – 4

A11y Failures

→ no change 2 – 2

A11y Failing Nodes

→ no change 2 – 2

Main thread work

Task	Share	Duration Simulated
other	34%	217 ms
script evaluation	32%	202 ms
style layout	18%	117 ms
parse HTML	11%	70 ms
paint composite render	4%	27 ms
script parse compile	1%	3 ms
Total		636 ms

Task

Time

Duration Simulated

other

34%

217 ms

script evaluation

32%

202 ms

style layout

18%

117 ms

parse HTML

11%

70 ms

paint composite render

27 ms

script parse compile

3 ms

Total

636 ms

Axe violations axe-core 4.13.0, full rule set

4 violating nodes across 3 rules, 178 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

moderate region — All page content should be contained by landmarks 2 nodes

Offending elements

.VPHero

<div class="VPHero has-image VPHomeHero" data-v-8a12ee6a="" data-v-28e93027="">

.VPFeatures

<div class="VPFeatures VPHomeFeatures" data-v-8a12ee6a="" data-v-a8703f4b="">

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 1 node

Offending element

.brand

<a class="VPButton no-icon medium brand" href="./guide/what-is-vitepress" data-v-28e93027="" data-v-f246de38=""><!--[-->What is VitePress?<!--]--></a>

moderate landmark-one-main — Document should have one main landmark 1 node
Offending element
1. html
```
<html lang="en-US" dir="ltr">
```

Accessibility failures 2 of 22 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 1 node
landmark-one-main — Document does not have a main landmark. 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	FCP	TTFB
2026-09-26	1.43 s	128 ms	1.35 s	647 ms
2026-09-19	1.56 s	138 ms	1.39 s	709 ms
2026-09-12	1.49 s	143 ms	1.43 s	733 ms
2026-09-05	1.56 s	160 ms	1.50 s	736 ms
2026-08-29	1.51 s	161 ms	1.47 s	639 ms
2026-08-22	1.47 s	176 ms	1.42 s	568 ms
2026-08-15	1.43 s	183 ms	1.37 s	521 ms
2026-08-08	1.44 s	170 ms	1.34 s	503 ms
2026-08-01	1.44 s	167 ms	1.35 s	491 ms
2026-07-25	1.47 s	167 ms	1.38 s	491 ms
2026-07-18	1.44 s	166 ms	1.34 s	511 ms
2026-07-11	1.44 s	164 ms	1.31 s	515 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-26

1.43 s

128 ms

1.35 s

647 ms

2026-09-19

1.56 s

138 ms

1.39 s

709 ms

2026-09-12

1.49 s

143 ms

1.43 s

733 ms

2026-09-05

1.56 s

160 ms

1.50 s

736 ms

2026-08-29

1.51 s

161 ms

1.47 s

639 ms

2026-08-22

1.47 s

176 ms

1.42 s

568 ms

2026-08-15

1.43 s

183 ms

1.37 s

521 ms

2026-08-08

1.44 s

170 ms

1.34 s

503 ms

2026-08-01

1.44 s

167 ms

1.35 s

491 ms

2026-07-25

1.47 s

167 ms

1.38 s

491 ms

2026-07-18

1.44 s

166 ms

1.34 s

511 ms

2026-07-11

1.44 s

164 ms

1.31 s

515 ms

Runs

Every stored run for this URL, newest first.

When Scores Perf LCP CLS TBT Weight Runs Spread Bench Took Archive

Oct 7, 2026, 5:38 PM UTC 98 2.33 s 0 21 ms 211 kB 3/3 ±1 2,490 0% 41.4s Wayback

Oct 6, 2026, 11:16 PM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 41s

Oct 3, 2026, 8:51 PM UTC 98 2.35 s 0 20 ms 211 kB 3/3 ±2 2,736 +10% 41.9s Wayback

Sep 30, 2026, 1:21 AM UTC 98 2.38 s 0 8 ms 211 kB 3/3 ±2 3,099 +25% 40.8s Wayback

Sep 27, 2026, 5:41 PM UTC 98 2.33 s 0 21 ms 211 kB 3/3 ±0 2,479 0% 40.6s Wayback

Sep 25, 2026, 6:01 AM UTC 97 2.40 s 0 15 ms 212 kB 3/3 ±2 2,979 +20% 40.7s Wayback

Sep 23, 2026, 12:11 AM UTC 98 2.33 s 0 9 ms 211 kB 3/3 ±0 2,908 +17% 39.5s Wayback

Sep 20, 2026, 11:16 PM UTC 98 2.36 s 0 23 ms 211 kB 3/3 ±1 2,486 0% 43.2s Wayback

Sep 18, 2026, 9:02 AM UTC 98 2.35 s 0 26 ms 211 kB 3/3 ±1 2,346 -6% 42.2s Wayback

Sep 16, 2026, 3:42 AM UTC 98 2.37 s 0 24 ms 211 kB 3/3 ±1 2,472 -1% 43.5s Wayback

Sep 14, 2026, 12:55 AM UTC 98 2.35 s 0 9 ms 211 kB 3/3 ±1 4,224 +70% 40.4s Wayback

Sep 11, 2026, 8:47 PM UTC 97 2.45 s 0 22 ms 212 kB 3/3 ±1 2,416 -3% 41.2s Wayback

Sep 9, 2026, 5:43 PM UTC 97 2.42 s 0 20 ms 212 kB 3/3 ±2 2,397 -4% 23.2s Wayback

Sep 7, 2026, 3:02 PM UTC 97 2.45 s 0 22 ms 212 kB 3/3 ±3 2,276 -8% 22.5s Wayback

Sep 5, 2026, 3:26 AM UTC 97 2.41 s 0 8 ms 212 kB 3/3 ±1 2,993 +20% 21.9s Wayback

Sep 4, 2026, 1:05 AM UTC 97 2.48 s 0 11 ms 212 kB 3/3 ±2 3,405 +37% 21.6s Wayback

Sep 2, 2026, 11:11 PM UTC 98 2.38 s 0 17 ms 211 kB 3/3 ±1 2,805 +13% 22.1s Wayback

Sep 1, 2026, 8:49 PM UTC 97 2.46 s 0 5 ms 212 kB 3/3 ±2 3,619 +46% 21.4s Wayback

Aug 31, 2026, 6:05 PM UTC 97 2.42 s 0 21 ms 212 kB 3/3 ±2 2,312 -7% 21.9s Wayback

Aug 26, 2026, 2:00 PM UTC 97 2.43 s 0 33 ms 212 kB 3/3 ±0 2,596 +4% 22.5s Wayback

Aug 25, 2026, 10:40 AM UTC 98 2.41 s 0 22 ms 212 kB 3/3 ±2 2,365 -5% 22.2s Wayback

Aug 24, 2026, 9:54 AM UTC 98 2.33 s 0 31 ms 210 kB 3/3 ±3 2,491 0% 26.1s Wayback

Aug 23, 2026, 9:26 AM UTC 97 2.41 s 0 31 ms 210 kB 3/3 ±7 2,440 -2% 27.9s Wayback

Aug 22, 2026, 9:25 AM UTC 98 2.33 s 0 29 ms 210 kB 3/3 ±5 2,330 -6% 26.7s Wayback

Aug 21, 2026, 8:45 AM UTC 98 2.35 s 0 17 ms 210 kB 3/3 ±2 2,861 +15% 23.1s Wayback

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 7, 2026, 5:38 PM UTC	98	2.33 s	0	21 ms	211 kB	3/3	±1	2,490 0%	41.4s	Wayback
Oct 6, 2026, 11:16 PM UTC	`TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse.`	41s
Oct 3, 2026, 8:51 PM UTC	98	2.35 s	0	20 ms	211 kB	3/3	±2	2,736 +10%	41.9s	Wayback
Sep 30, 2026, 1:21 AM UTC	98	2.38 s	0	8 ms	211 kB	3/3	±2	3,099 +25%	40.8s	Wayback
Sep 27, 2026, 5:41 PM UTC	98	2.33 s	0	21 ms	211 kB	3/3	±0	2,479 0%	40.6s	Wayback
Sep 25, 2026, 6:01 AM UTC	97	2.40 s	0	15 ms	212 kB	3/3	±2	2,979 +20%	40.7s	Wayback
Sep 23, 2026, 12:11 AM UTC	98	2.33 s	0	9 ms	211 kB	3/3	±0	2,908 +17%	39.5s	Wayback
Sep 20, 2026, 11:16 PM UTC	98	2.36 s	0	23 ms	211 kB	3/3	±1	2,486 0%	43.2s	Wayback
Sep 18, 2026, 9:02 AM UTC	98	2.35 s	0	26 ms	211 kB	3/3	±1	2,346 -6%	42.2s	Wayback
Sep 16, 2026, 3:42 AM UTC	98	2.37 s	0	24 ms	211 kB	3/3	±1	2,472 -1%	43.5s	Wayback
Sep 14, 2026, 12:55 AM UTC	98	2.35 s	0	9 ms	211 kB	3/3	±1	4,224 +70%	40.4s	Wayback
Sep 11, 2026, 8:47 PM UTC	97	2.45 s	0	22 ms	212 kB	3/3	±1	2,416 -3%	41.2s	Wayback
Sep 9, 2026, 5:43 PM UTC	97	2.42 s	0	20 ms	212 kB	3/3	±2	2,397 -4%	23.2s	Wayback
Sep 7, 2026, 3:02 PM UTC	97	2.45 s	0	22 ms	212 kB	3/3	±3	2,276 -8%	22.5s	Wayback
Sep 5, 2026, 3:26 AM UTC	97	2.41 s	0	8 ms	212 kB	3/3	±1	2,993 +20%	21.9s	Wayback
Sep 4, 2026, 1:05 AM UTC	97	2.48 s	0	11 ms	212 kB	3/3	±2	3,405 +37%	21.6s	Wayback
Sep 2, 2026, 11:11 PM UTC	98	2.38 s	0	17 ms	211 kB	3/3	±1	2,805 +13%	22.1s	Wayback
Sep 1, 2026, 8:49 PM UTC	97	2.46 s	0	5 ms	212 kB	3/3	±2	3,619 +46%	21.4s	Wayback
Aug 31, 2026, 6:05 PM UTC	97	2.42 s	0	21 ms	212 kB	3/3	±2	2,312 -7%	21.9s	Wayback
Aug 26, 2026, 2:00 PM UTC	97	2.43 s	0	33 ms	212 kB	3/3	±0	2,596 +4%	22.5s	Wayback
Aug 25, 2026, 10:40 AM UTC	98	2.41 s	0	22 ms	212 kB	3/3	±2	2,365 -5%	22.2s	Wayback
Aug 24, 2026, 9:54 AM UTC	98	2.33 s	0	31 ms	210 kB	3/3	±3	2,491 0%	26.1s	Wayback
Aug 23, 2026, 9:26 AM UTC	97	2.41 s	0	31 ms	210 kB	3/3	±7	2,440 -2%	27.9s	Wayback
Aug 22, 2026, 9:25 AM UTC	98	2.33 s	0	29 ms	210 kB	3/3	±5	2,330 -6%	26.7s	Wayback
Aug 21, 2026, 8:45 AM UTC	98	2.35 s	0	17 ms	210 kB	3/3	±2	2,861 +15%	23.1s	Wayback

Stack

Filmstrip LAB 🐢 Throttled

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐢 Throttled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 1 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 2 of 22 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Filmstrip LAB Throttled

Lighthouse Scores LAB Simulated

LCP Subparts LAB Throttled

LCP LAB Simulated vs LCP FIELD