gatsbyjs.com

https://www.gatsbyjs.com/

Data from Aug 21, 2026, 12:50 PM UTC — 6h old.

Site Generators · 1 measurement · since Aug 21, 2026 · last attempt 6h

Stack

Detected on the same page load as the accessibility pass — the generator from <meta name="generator"> or the shape of the page, the host from response headers.

Built with Gatsby 4.24.6

Hosted by Netlify

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-23 → 2026-08-19). This is what Google measures you on.

LCP 2.00 s good

INP 98 ms good

CLS 0 good

Scores

Performance

no change

100

Accessibility

no change

Best Practices

no change

SEO

no change

Lab metrics Lighthouse, mobile

Metric	Current	Previous	Change	Best	Worst
LCP Largest Contentful Paint	4.01 s	—	—	4.01 s	4.01 s
CLS Cumulative Layout Shift	0	—	—	0	0
TBT Total Blocking Time	154 ms	—	—	154 ms	154 ms
FCP First Contentful Paint	964 ms	—	—	964 ms	964 ms
Speed Index	964 ms	—	—	964 ms	964 ms
TTFB Time to First Byte	632 ms	—	—	632 ms	632 ms

What LCP is made of

A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.

element render delay 281 ms

resource load delay 94 ms

resource load duration 35 ms

time to first byte 34 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-23 → 2026-08-19). This is what Google measures you on.

Metric	p75	Rating	Distribution (good / needs work / poor)
LCP CWV	2.00 s	good	86.2% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run	98 ms	good	96.8% good
CLS CWV	0	good	98.7% good
FCP	1.28 s	good	86.6% good
TTFB	980 ms	needs-improvement	66.2% good

Metric

p75

Rating

Distribution (good / needs work / poor)

LCP CWV

2.00 s

good

86.2% good

INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run

98 ms

good

96.8% good

CLS CWV

good

98.7% good

FCP

1.28 s

good

86.6% good

TTFB

980 ms

needs-improvement

66.2% good

Lab vs field

Lab LCP 4.01 s · field p75 2.00 s · real users are 0.5× faster than the lab.

Field history 25 weeks

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

Week ending	LCP	INP	FCP	TTFB
2026-08-15	1.94 s	99 ms	1.28 s	946 ms
2026-08-08	1.99 s	99 ms	1.33 s	988 ms
2026-08-01	2.00 s	103 ms	1.40 s	1.01 s
2026-07-25	2.00 s	110 ms	1.40 s	1.03 s
2026-07-18	2.02 s	128 ms	1.43 s	1.12 s
2026-07-11	2.01 s	113 ms	1.43 s	1.09 s
2026-07-04	1.97 s	106 ms	1.39 s	1.04 s
2026-06-27	1.88 s	120 ms	1.35 s	991 ms
2026-06-20	1.82 s	120 ms	1.26 s	956 ms
2026-06-13	1.82 s	120 ms	1.26 s	968 ms
2026-06-06	1.80 s	122 ms	1.25 s	989 ms
2026-05-30	1.78 s	108 ms	1.23 s	977 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-08-15

1.94 s

99 ms

1.28 s

946 ms

2026-08-08

1.99 s

99 ms

1.33 s

988 ms

2026-08-01

2.00 s

103 ms

1.40 s

1.01 s

2026-07-25

2.00 s

110 ms

1.40 s

1.03 s

2026-07-18

2.02 s

128 ms

1.43 s

1.12 s

2026-07-11

2.01 s

113 ms

1.43 s

1.09 s

2026-07-04

1.97 s

106 ms

1.39 s

1.04 s

2026-06-27

1.88 s

120 ms

1.35 s

991 ms

2026-06-20

1.82 s

120 ms

1.26 s

956 ms

2026-06-13

1.82 s

120 ms

1.26 s

968 ms

2026-06-06

1.80 s

122 ms

1.25 s

989 ms

2026-05-30

1.78 s

108 ms

1.23 s

977 ms

Page weight

Metric	Current	Previous	Change	Best	Worst
Page Weight	469.0 kB	—	—	469.0 kB	469.0 kB
Requests	43	—	—	43	43
Third-party Weight	9.5 kB	—	—	9.5 kB	9.5 kB
Third-party CPU	0 ms	—	—	0 ms	0 ms
Unused JS	62.5 kB	—	—	62.5 kB	62.5 kB
Unused CSS	12.0 kB	—	—	12.0 kB	12.0 kB

By resource type

script 342.6 kB · 28 req

font 55.6 kB · 2 req

document 31.9 kB · 1 req

other 20.2 kB · 8 req

image 18.7 kB · 3 req

third party 9.5 kB · 4 req

Third parties 1 entities

9.5 kB transferred, 0 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

ctfassets.net 9.5 kB · 0 ms CPU

Page health

Metric	Current	Previous	Change	Best	Worst
Main Thread Work	1.09 s	—	—	1.09 s	1.09 s
Long Tasks	3	—	—	3	3
DOM Elements	331	—	—	331	331
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset	3	—	—	3	3
A11y Failures	0	—	—	0	0
A11y Failing Nodes	0	—	—	0	0

Main thread work

script evaluation 548 ms

other 222 ms

script parse compile 134 ms

style layout 112 ms

parse HTML 38 ms

paint composite render 26 ms

garbage collection 11 ms

Axe violations axe-core 4.13.0, full rule set

3 violating nodes across 2 rules, 405 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.

minor aria-allowed-role — ARIA role should be appropriate for the element 2 nodes
moderate region — All page content should be contained by landmarks 1 node

Hygiene

Changes rarely — which is exactly why a change is worth noticing.

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 2 console errors

Measurement log

Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took
Aug 21, 2026, 12:50 PM UTC	85	4.01 s	0	154 ms	469.0 kB	3/3	±25	2,477	27.3s

When

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Aug 21, 2026, 12:50 PM UTC

4.01 s

154 ms

469.0 kB

3/3

±25

2,477

27.3s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show gatsbyjs.com's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify-score.js component code into your site!

<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://www.gatsbyjs.com/"></speedlify-score>