svelte.dev

Ranks Overall #629 Developer Tooling #11 Site Generators #4 Frameworks and Libraries #2

Data from Sep 14, 2026, 12:53 AM UTC 31h old Measured every 2 days · 15 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Scoring Calculator · Wayback Machine

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 4,245, 71% faster than this project's median of 2,482. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

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 SvelteKit

Uses Svelte

Hosted by Vercel

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.26 s. Compare this filmstrip against another site.

408 ms
816 ms
1.22 s
1.63 s
2.04 s
2.45 s
2.85 s
3.26 s

Lighthouse Scores LAB Simulated

Performance

no change

100

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 (2026-08-15 → 2026-09-11), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	2.58 s needs work	↑ +6 ms (+0.2%) 2.42 s – 2.60 s	1.43 s good	91.4% 5% 3.6%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	129 ms good	88.3% 8.7% 3.1%
CLS CWV Cumulative Layout Shift	0.051 good	→ no change 0.051 – 0.051	0.050 good	98.5% 1.3% 0.2%
TBT Total Blocking Time	0 ms good	↓ -24 ms (-100%) 0 ms – 77 ms	n/a	—
FCP First Contentful Paint	1.53 s good	↑ +6 ms (+0.4%) 1.52 s – 1.55 s	1.41 s good	83.9% 10.7% 5.4%
Speed Index	1.53 s good	↑ +6 ms (+0.4%) 1.52 s – 1.55 s	n/a	—
TTFB Time to First Byte	633 ms good	↑ +6 ms (+1%) 619 ms – 651 ms	569 ms good	84.1% 11.1% 4.8%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

2.58 s needs work

↑ +6 ms (+0.2%) 2.42 s – 2.60 s

1.43 s good

91.4% 5% 3.6%

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

n/a

—

129 ms good

88.3% 8.7% 3.1%

CLS CWV Cumulative Layout Shift

0.051 good

→ no change 0.051 – 0.051

0.050 good

98.5% 1.3% 0.2%

TBT Total Blocking Time

0 ms good

↓ -24 ms (-100%) 0 ms – 77 ms

n/a

—

FCP First Contentful Paint

1.53 s good

↑ +6 ms (+0.4%) 1.52 s – 1.55 s

1.41 s good

83.9% 10.7% 5.4%

Speed Index

1.53 s good

↑ +6 ms (+0.4%) 1.52 s – 1.55 s

n/a

—

TTFB Time to First Byte

633 ms good

↑ +6 ms (+1%) 619 ms – 651 ms

569 ms good

84.1% 11.1% 4.8%

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.

element render delay 1.48 s

time to first byte 584 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.58 s

Field p75 1.43 s

The lab LCP is 1.81× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	10.38 MB	↑ +3026.5 kB (+42.5%) 4.47 MB – 10.40 MB
Requests	71	→ no change 71 – 71
Third-party Weight	4.06 MB	↑ +448.0 kB (+12.7%) significant 3.41 MB – 4.19 MB
Third-party CPU	0 ms	→ no change 0 ms – 0 ms
Unused JS	0 B	→ no change 0 B – 0 B
Unused CSS	0 B	→ no change 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

10.38 MB

↑ +3026.5 kB (+42.5%) 4.47 MB – 10.40 MB

Requests

→ no change 71 – 71

Third-party Weight

4.06 MB

↑ +448.0 kB (+12.7%) significant 3.41 MB – 4.19 MB

Third-party CPU

0 ms

→ no change 0 ms – 0 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	Share	Size	Requests
media	90.9%	9.44 MB	1
other	3.6%	369 kB	5
image	3.2%	336 kB	12
script	1.1%	117 kB	28
font	0.7%	71.0 kB	3
document	0.2%	23.9 kB	1
stylesheet	0.2%	23.3 kB	6
Total		10.38 MB	71

Third parties 1 entities

Entity	Transfer	Size	Main thread Simulated
GitHub	media	4.06 MB	0 ms
Total		4.06 MB	0 ms

Entity

Transfer

Size

Main thread Simulated

GitHub

media

4.06 MB

0 ms

Total

4.06 MB

0 ms

Without JavaScript

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

36.2% 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
Main Thread Work	1.29 s	↓ -154 ms (-10.7%) 1.02 s – 1.69 s
Long Tasks	0	↓ -3 (-100%) significant 0 – 3
DOM Elements	348	→ no change 348 – 348
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	1	→ no change 1 – 1
A11y Failures	0	→ no change 0 – 0
A11y Failing Nodes	0	→ no change 0 – 0

Metric

Value

Change / range

Trend

Main Thread Work

1.29 s

↓ -154 ms (-10.7%) 1.02 s – 1.69 s

Long Tasks

↓ -3 (-100%) significant 0 – 3

DOM Elements

348

→ no change 348 – 348

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

→ no change 1 – 1

A11y Failures

→ no change 0 – 0

A11y Failing Nodes

→ no change 0 – 0

Main thread work

Task	Share	Duration Simulated
other	40%	520 ms
script evaluation	26%	329 ms
style layout	17%	220 ms
paint composite render	12%	154 ms
parse HTML	3%	41 ms
garbage collection	1%	11 ms
script parse compile	1%	10 ms
Total		1.29 s

Task

Time

Duration Simulated

other

40%

520 ms

script evaluation

26%

329 ms

style layout

17%

220 ms

paint composite render

12%

154 ms

parse HTML

41 ms

garbage collection

11 ms

script parse compile

10 ms

Total

1.29 s

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 593 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 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	CLS	FCP	TTFB
2026-09-05	1.39 s	126 ms	0.050	1.37 s	553 ms
2026-08-29	1.37 s	129 ms	0.010	1.34 s	534 ms
2026-08-22	1.33 s	124 ms	0.010	1.31 s	509 ms
2026-08-15	1.35 s	129 ms	0.010	1.33 s	523 ms
2026-08-08	1.39 s	129 ms	0.010	1.36 s	539 ms
2026-08-01	1.40 s	134 ms	0.010	1.38 s	565 ms
2026-07-25	1.43 s	142 ms	0.010	1.41 s	590 ms
2026-07-18	1.48 s	139 ms	0.010	1.44 s	595 ms
2026-07-11	1.44 s	132 ms	0.010	1.43 s	594 ms
2026-07-04	1.43 s	129 ms	0.010	1.41 s	563 ms
2026-06-27	1.43 s	129 ms	0.010	1.39 s	543 ms
2026-06-20	1.39 s	129 ms	0.010	1.36 s	528 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-05

1.39 s

126 ms

0.050

1.37 s

553 ms

2026-08-29

1.37 s

129 ms

0.010

1.34 s

534 ms

2026-08-22

1.33 s

124 ms

0.010

1.31 s

509 ms

2026-08-15

1.35 s

129 ms

0.010

1.33 s

523 ms

2026-08-08

1.39 s

129 ms

0.010

1.36 s

539 ms

2026-08-01

1.40 s

134 ms

0.010

1.38 s

565 ms

2026-07-25

1.43 s

142 ms

0.010

1.41 s

590 ms

2026-07-18

1.48 s

139 ms

0.010

1.44 s

595 ms

2026-07-11

1.44 s

132 ms

0.010

1.43 s

594 ms

2026-07-04

1.43 s

129 ms

0.010

1.41 s

563 ms

2026-06-27

1.43 s

129 ms

0.010

1.39 s

543 ms

2026-06-20

1.39 s

129 ms

0.010

1.36 s

528 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Sep 14, 2026, 12:53 AM UTC	96	2.58 s	0.051	0 ms	10.38 MB	3/3	±4	4,245 +71%	111.7s	Wayback
Sep 11, 2026, 8:45 PM UTC	96	2.58 s	0.051	24 ms	7.29 MB	3/3	±0	2,506 +1%	116.1s	Wayback
Sep 9, 2026, 5:42 PM UTC	96	2.59 s	0.051	26 ms	7.24 MB	3/3	±5	2,477 0%	90.1s	Wayback
Sep 7, 2026, 3:01 PM UTC	96	2.58 s	0.051	20 ms	7.24 MB	3/3	±0	2,301 -7%	89.2s	Wayback
Sep 5, 2026, 3:25 AM UTC	97	2.42 s	0.051	4 ms	10.39 MB	3/3	±1	3,041 +23%	88s	Wayback
Sep 4, 2026, 1:03 AM UTC	96	2.60 s	0.051	4 ms	7.24 MB	3/3	±1	3,366 +36%	87.5s	Wayback
Sep 2, 2026, 11:10 PM UTC	96	2.58 s	0.051	18 ms	7.48 MB	3/3	±5	2,812 +13%	89.2s	Wayback
Sep 1, 2026, 8:48 PM UTC	96	2.59 s	0.051	0 ms	4.47 MB	3/3	±5	3,294 +33%	87.3s	Wayback
Aug 31, 2026, 6:04 PM UTC	96	2.58 s	0.051	22 ms	7.24 MB	3/3	±5	2,330 -6%	90.4s	Wayback
Aug 26, 2026, 1:59 PM UTC	96	2.59 s	0.051	25 ms	7.25 MB	3/3	±0	2,555 +3%	90.5s	Wayback
Aug 25, 2026, 10:38 AM UTC	96	2.58 s	0.051	23 ms	10.40 MB	3/3	±5	2,384 -4%	89.9s	Wayback
Aug 24, 2026, 8:58 AM UTC	96	2.59 s	0.051	77 ms	7.25 MB	3/3	±33	3,333 +34%	93.9s	Wayback
Aug 23, 2026, 8:28 AM UTC	96	2.58 s	0.051	20 ms	10.40 MB	3/3	±0	2,308 -7%	90.1s	Wayback
Aug 22, 2026, 8:28 AM UTC	96	2.57 s	0.051	41 ms	7.70 MB	3/3	±2	2,481 0%	91s	Wayback
Aug 21, 2026, 7:46 AM UTC	96	2.57 s	0.051	11 ms	7.29 MB	3/3	±1	2,995 +21%	86.1s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

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

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