developers.cloudflare.com

https://developers.cloudflare.com/

Ranks Overall #1,365 Astro Showcase #131

Data from Oct 2, 2026, 6:51 AM UTC 16h 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

Built with Astro 7.3.5

Hosted by Cloudflare

Lighthouse Scores LAB Simulated

Performance

no change

Accessibility

no change

100

Best Practices

no change

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 (2026-09-02 → 2026-09-29), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	2.92 s needs work	— 2.92 s – 2.92 s	936 ms good	94.1% 3% 2.9%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	165 ms good	79.7% 15.6% 4.8%
CLS CWV Cumulative Layout Shift	0.003 good	— 0.003 – 0.003	0 good	94.1% 5.1% 0.8%
TBT Total Blocking Time	5 ms good	— 5 ms – 5 ms	n/a	—
FCP First Contentful Paint	2.00 s needs work	— 2.00 s – 2.00 s	842 ms good	91.3% 4.2% 4.4%
Speed Index	2.00 s good	— 2.00 s – 2.00 s	n/a	—
TTFB Time to First Byte	475 ms good	— 475 ms – 475 ms	353 ms good	90% 6% 4%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

2.92 s needs work

— 2.92 s – 2.92 s

936 ms good

94.1% 3% 2.9%

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

n/a

—

165 ms good

79.7% 15.6% 4.8%

CLS CWV Cumulative Layout Shift

0.003 good

— 0.003 – 0.003

0 good

94.1% 5.1% 0.8%

TBT Total Blocking Time

5 ms good

— 5 ms – 5 ms

n/a

—

FCP First Contentful Paint

2.00 s needs work

— 2.00 s – 2.00 s

842 ms good

91.3% 4.2% 4.4%

Speed Index

2.00 s good

— 2.00 s – 2.00 s

n/a

—

TTFB Time to First Byte

475 ms good

— 475 ms – 475 ms

353 ms good

90% 6% 4%

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.

element render delay 140 ms

time to first byte 26 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.92 s

Field p75 936 ms

The lab LCP is 3.13× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	513 kB	— 513 kB – 513 kB
Requests	40	— 40 – 40
Third-party Weight	10.4 kB	— 10.4 kB – 10.4 kB
Third-party CPU	5 ms	— 5 ms – 5 ms
Unused JS	73.3 kB	— 73.3 kB – 73.3 kB
Unused CSS	0 B	— 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

513 kB

— 513 kB – 513 kB

Requests

— 40 – 40

Third-party Weight

10.4 kB

— 10.4 kB – 10.4 kB

Third-party CPU

5 ms

— 5 ms – 5 ms

Unused JS

73.3 kB

— 73.3 kB – 73.3 kB

Unused CSS

0 B

— 0 B – 0 B

By resource type

Type	Share	Size	Requests
script	39.6%	202 kB	16
image	21.3%	109 kB	11
font	18%	92.0 kB	2
other	7.3%	37.1 kB	7
document	7%	35.9 kB	1
stylesheet	6.8%	34.6 kB	2
Total		513 kB	40

Third parties 2 entities

Entity	Transfer	Size	Main thread Simulated
Cloudflare	script	10.2 kB	5 ms
Optanon		153 B	0 ms
Total		10.4 kB	5 ms

Entity

Transfer

Size

Main thread Simulated

Cloudflare

script

10.2 kB

5 ms

Optanon

153 B

0 ms

Total

10.4 kB

5 ms

Page health

Metric	Value	Change / range
Main Thread Work	1.10 s	— 1.10 s – 1.10 s
Long Tasks	4	— 4 – 4
DOM Elements	1,768	— 1,768 – 1,768
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	27	— 27 – 27
A11y Failures	3	— 3 – 3
A11y Failing Nodes	37	— 37 – 37

Metric

Value

Change / range

Trend

Main Thread Work

1.10 s

— 1.10 s – 1.10 s

Long Tasks

— 4 – 4

DOM Elements

1,768

— 1,768 – 1,768

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

— 27 – 27

A11y Failures

— 3 – 3

A11y Failing Nodes

— 37 – 37

Main thread work

Task	Share	Duration Simulated
style layout	34%	378 ms
other	32%	354 ms
script evaluation	19%	209 ms
parse HTML	5%	55 ms
paint composite render	5%	53 ms
script parse compile	5%	53 ms
Total		1.10 s

Task

Time

Duration Simulated

style layout

34%

378 ms

other

32%

354 ms

script evaluation

19%

209 ms

parse HTML

55 ms

paint composite render

53 ms

script parse compile

53 ms

Total

1.10 s

Axe violations axe-core 4.13.0, full rule set

27 violating nodes across 2 rules, 1293 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 26 nodes

Offending elements (5 of 26)

.text-primary-foreground.hover\:bg-primary-hover[href$="get-started/"]

<a href="/fundamentals/get-st..." data-nb-button="" class="group inline-flex w-...">

.connect-card-cta

<a href="https://www.cloudfla..." data-nb-button="" class="group inline-flex w-..." target="_blank" rel="noopener noreferrer" data-astro-cid-tsipy...="true">

button[data-nb-cli-toggle="cf"]

<button type="button" data-nb-cli-toggle="cf" aria-pressed="false" class="text-muted-foregroun...">

.mt-0

<p class="text-muted-foreground mt-0 mb-2 max-w-[50ch] text-sm leading-relaxed text-pretty md:text-base">Paste into any AI coding agent to install Cloudflare agent tooling:</p>

.group\/card.p-6.bg-background:nth-child(6) > .mb-4.justify-between.items-center > .text-primary.tracking-widest.text-xs
```
<span class="text-primary font-mono text-xs tracking-widest uppercase">Agents</span>
```

critical aria-allowed-attr — Elements must only use supported ARIA attributes 1 node

Offending element

.pl-1

<div class="relative flex shrink-0 items-center pl-1" data-connect-speakers="" aria-label="Featured speakers" data-astro-cid-tsipyi4s="" aria-expanded="false">

Accessibility failures 3 of 27 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 26 nodes
target-size — Touch targets do not have sufficient size or spacing. 10 nodes
aria-allowed-attr — `[aria-*]` attributes do not match their roles 1 node

SEO failures 1 of 10 audits

link-text — Links do not have descriptive text 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

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	933 ms	162 ms	838 ms	352 ms
2026-09-19	928 ms	155 ms	831 ms	350 ms
2026-09-12	938 ms	157 ms	844 ms	351 ms
2026-09-05	934 ms	155 ms	844 ms	348 ms
2026-08-29	946 ms	157 ms	858 ms	353 ms
2026-08-22	953 ms	162 ms	872 ms	361 ms
2026-08-15	956 ms	163 ms	862 ms	362 ms
2026-08-08	969 ms	158 ms	838 ms	362 ms
2026-08-01	990 ms	154 ms	817 ms	362 ms
2026-07-25	996 ms	148 ms	785 ms	353 ms
2026-07-18	1.01 s	146 ms	770 ms	351 ms
2026-07-11	1.02 s	146 ms	771 ms	349 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-26

933 ms

162 ms

838 ms

352 ms

2026-09-19

928 ms

155 ms

831 ms

350 ms

2026-09-12

938 ms

157 ms

844 ms

351 ms

2026-09-05

934 ms

155 ms

844 ms

348 ms

2026-08-29

946 ms

157 ms

858 ms

353 ms

2026-08-22

953 ms

162 ms

872 ms

361 ms

2026-08-15

956 ms

163 ms

862 ms

362 ms

2026-08-08

969 ms

158 ms

838 ms

362 ms

2026-08-01

990 ms

154 ms

817 ms

362 ms

2026-07-25

996 ms

148 ms

785 ms

353 ms

2026-07-18

1.01 s

146 ms

770 ms

351 ms

2026-07-11

1.02 s

146 ms

771 ms

349 ms

Runs

Every stored run for this URL, newest first.

When	Scores	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 2, 2026, 6:51 AM UTC		93	2.92 s	0.003	5 ms	513 kB	3/3	±1	2,491 0%	40s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Stack

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐇 Unthrottled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 2 entities

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 3 of 27 audits

SEO failures 1 of 10 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Lighthouse Scores LAB Simulated

LCP Subparts LAB Unthrottled

LCP LAB Simulated vs LCP FIELD