react.gg

Ranks Overall #1,590 Astro Showcase #172

Data from Oct 2, 2026, 1:42 PM UTC 9h 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 5.16.0

Uses React

Hosted by Vercel

Lighthouse Scores LAB Simulated

Performance

no change

Accessibility

no change

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	4.56 s poor	— 4.56 s – 4.56 s	1.83 s good	86.5% 9.3% 4.2%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	181 ms good	78.3% 18.8% 2.9%
CLS CWV Cumulative Layout Shift	0 good	— 0 – 0	0 good	100% 0% 0%
TBT Total Blocking Time	552 ms needs work	— 552 ms – 552 ms	n/a	—
FCP First Contentful Paint	1.63 s good	— 1.63 s – 1.63 s	1.83 s needs work	73.5% 18.4% 8.1%
Speed Index	2.40 s good	— 2.40 s – 2.40 s	n/a	—
TTFB Time to First Byte	611 ms good	— 611 ms – 611 ms	631 ms good	80.3% 15.2% 4.5%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

4.56 s poor

— 4.56 s – 4.56 s

1.83 s good

86.5% 9.3% 4.2%

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

n/a

—

181 ms good

78.3% 18.8% 2.9%

CLS CWV Cumulative Layout Shift

0 good

— 0 – 0

0 good

100% 0% 0%

TBT Total Blocking Time

552 ms needs work

— 552 ms – 552 ms

n/a

—

FCP First Contentful Paint

1.63 s good

— 1.63 s – 1.63 s

1.83 s needs work

73.5% 18.4% 8.1%

Speed Index

2.40 s good

— 2.40 s – 2.40 s

n/a

—

TTFB Time to First Byte

611 ms good

— 611 ms – 611 ms

631 ms good

80.3% 15.2% 4.5%

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.

element render delay 305 ms

time to first byte 5 ms

LCP LAB Simulated vs LCP FIELD

Lab 4.56 s

Field p75 1.83 s

The lab LCP is 2.49× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	1.32 MB	— 1.32 MB – 1.32 MB
Requests	70	— 70 – 70
Third-party Weight	842 kB	— 842 kB – 842 kB
Third-party CPU	283 ms	— 283 ms – 283 ms
Unused JS	279 kB	— 279 kB – 279 kB
Unused CSS	0 B	— 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

1.32 MB

— 1.32 MB – 1.32 MB

Requests

— 70 – 70

Third-party Weight

842 kB

— 842 kB – 842 kB

Third-party CPU

283 ms

— 283 ms – 283 ms

Unused JS

279 kB

— 279 kB – 279 kB

Unused CSS

0 B

— 0 B – 0 B

By resource type

Type	Share	Size	Requests
script	57%	752 kB	21
image	25.3%	334 kB	31
document	8.7%	115 kB	1
font	5.3%	70.2 kB	5
other	2.6%	34.8 kB	8
stylesheet	1%	13.1 kB	4
Total		1.32 MB	70

Third parties 8 entities

Entity	Transfer	Size	Main thread Simulated
Google Tag Manager	script	353 kB	137 ms
Facebook	script	261 kB	136 ms
GitHub	image	210 kB	0 ms
Twitter Online Conversion Tracking		17.5 kB	10 ms
Twitter Short URL		157 B	0 ms
All 8		842 kB	283 ms

Entity

Transfer

Size

Main thread Simulated

Google Tag Manager

script

353 kB

137 ms

Facebook

script

261 kB

136 ms

GitHub

image

210 kB

0 ms

Twitter Online Conversion Tracking

17.5 kB

10 ms

Twitter Short URL

157 B

0 ms

All 8

842 kB

283 ms

Page health

Metric	Value	Change / range
Main Thread Work	2.92 s	— 2.92 s – 2.92 s
Long Tasks	9	— 9 – 9
DOM Elements	1,553	— 1,553 – 1,553
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	34	— 34 – 34
A11y Failures	2	— 2 – 2
A11y Failing Nodes	3	— 3 – 3

Metric

Value

Change / range

Trend

Main Thread Work

2.92 s

— 2.92 s – 2.92 s

Long Tasks

— 9 – 9

DOM Elements

1,553

— 1,553 – 1,553

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

— 34 – 34

A11y Failures

— 2 – 2

A11y Failing Nodes

— 3 – 3

Main thread work

Task	Share	Duration Simulated
script evaluation	44%	1.29 s
other	27%	780 ms
style layout	12%	361 ms
script parse compile	8%	235 ms
paint composite render	4%	106 ms
parse HTML	3%	76 ms
garbage collection	2%	72 ms
Total		2.92 s

Task

Time

Duration Simulated

script evaluation

44%

1.29 s

other

27%

780 ms

style layout

12%

361 ms

script parse compile

235 ms

paint composite render

106 ms

parse HTML

76 ms

garbage collection

72 ms

Total

2.92 s

Axe violations axe-core 4.13.0, full rule set

34 violating nodes across 3 rules, 1882 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 31 nodes

Offending elements (5 of 31)

.logo-strip > small

<small data-astro-cid-j7pv25f6="">You’ll be in great company with other developers we’ve trained</small>

.selected-reviews:nth-child(4)

<section id="reviews" class="selected-reviews" data-astro-cid-j7pv25f6="">

.story

<section class="story" data-astro-cid-j7pv25f6="">

.board-01 > h2

<h2 data-astro-cid-szdjj2gi="">What you’ll learn</h2>

.aha-moment > .content[data-astro-cid-szdjj2gi=""]
```
<div class="content" data-astro-cid-szdjj2gi="">
```

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 2 nodes
Offending elements
1. .review-item[data-astro-cid-j7pv25f6=""]:nth-child(2) > .review-quote > p[data-astro-cid-j7pv25f6=""]
```
<p data-astro-cid-j7pv25f6="">
```
2. .review-item[data-astro-cid-wqokka4z=""]:nth-child(2) > .review-quote > p[data-astro-cid-wqokka4z=""]
```
<p data-astro-cid-wqokka4z="">
```
moderate landmark-one-main — Document should have one main landmark 1 node
Offending element
1. html
```
<html lang="en">
```

Accessibility failures 2 of 26 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 2 nodes
landmark-one-main — Document does not have a main landmark. 1 node

Best Practices failures 2 of 20 audits

third-party-cookies — Uses third-party cookies 8 items
inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item

SEO failures 1 of 10 audits

robots-txt — robots.txt is not valid 63 items

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	1.84 s	181 ms	1.83 s	626 ms
2026-09-19	1.75 s	152 ms	1.81 s	584 ms
2026-09-12	1.89 s	153 ms	1.90 s	514 ms
2026-09-05	1.74 s	138 ms	1.72 s	528 ms
2026-08-29	1.72 s	129 ms	1.71 s	528 ms
2026-08-22	1.99 s	136 ms	1.99 s	618 ms
2026-08-15	1.78 s	136 ms	1.82 s	628 ms
2026-08-08	1.74 s	141 ms	1.80 s	674 ms
2026-08-01	1.52 s	141 ms	1.45 s	645 ms
2026-07-25	1.49 s	150 ms	1.42 s	645 ms
2026-07-18	1.66 s	156 ms	1.52 s	672 ms
2026-07-11	1.79 s	165 ms	1.66 s	672 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-26

1.84 s

181 ms

1.83 s

626 ms

2026-09-19

1.75 s

152 ms

1.81 s

584 ms

2026-09-12

1.89 s

153 ms

1.90 s

514 ms

2026-09-05

1.74 s

138 ms

1.72 s

528 ms

2026-08-29

1.72 s

129 ms

1.71 s

528 ms

2026-08-22

1.99 s

136 ms

1.99 s

618 ms

2026-08-15

1.78 s

136 ms

1.82 s

628 ms

2026-08-08

1.74 s

141 ms

1.80 s

674 ms

2026-08-01

1.52 s

141 ms

1.45 s

645 ms

2026-07-25

1.49 s

150 ms

1.42 s

645 ms

2026-07-18

1.66 s

156 ms

1.52 s

672 ms

2026-07-11

1.79 s

165 ms

1.66 s

672 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, 1:42 PM UTC		69	4.56 s	0	552 ms	1.32 MB	3/3	±3	2,471 -1%	33.2s	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 8 entities

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 2 of 26 audits

Best Practices failures 2 of 20 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