fly.io

Data from Aug 20, 2026, 10:36 PM UTC — 20h old.

Web Hosts · 1 measurement · since Aug 20, 2026 · last attempt 20h

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.

Fl Hosted by Fly.io

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-22 → 2026-08-18). This is what Google measures you on.

LCP 2.56 s needs-improvement

INP 137 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	9.27 s	—	—	9.27 s	9.27 s
CLS Cumulative Layout Shift	0	—	—	0	0
TBT Total Blocking Time	667 ms	—	—	667 ms	667 ms
FCP First Contentful Paint	1.52 s	—	—	1.52 s	1.52 s
Speed Index	1.52 s	—	—	1.52 s	1.52 s
TTFB Time to First Byte	612 ms	—	—	612 ms	612 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.

resource load delay 212 ms

element render delay 131 ms

resource load duration 91 ms

time to first byte 17 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-22 → 2026-08-18). This is what Google measures you on.

Metric	p75	Rating	Distribution (good / needs work / poor)
LCP CWV	2.56 s	needs-improvement	74.2% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run	137 ms	good	84.8% good
CLS CWV	0	good	99.4% good
FCP	2.11 s	needs-improvement	66.8% good
TTFB	840 ms	needs-improvement	73.4% good

Metric

p75

Rating

Distribution (good / needs work / poor)

LCP CWV

2.56 s

needs-improvement

74.2% good

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

137 ms

good

84.8% good

CLS CWV

good

99.4% good

FCP

2.11 s

needs-improvement

66.8% good

TTFB

840 ms

needs-improvement

73.4% good

Lab vs field

Lab LCP 9.27 s · field p75 2.56 s · real users are 0.28× 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	2.59 s	139 ms	2.14 s	853 ms
2026-08-08	2.69 s	149 ms	2.19 s	871 ms
2026-08-01	2.81 s	161 ms	2.25 s	890 ms
2026-07-25	2.90 s	162 ms	2.25 s	879 ms
2026-07-18	2.92 s	165 ms	2.23 s	832 ms
2026-07-11	2.88 s	161 ms	2.19 s	801 ms
2026-07-04	2.81 s	154 ms	2.13 s	750 ms
2026-06-27	2.76 s	152 ms	2.11 s	727 ms
2026-06-20	2.75 s	147 ms	2.09 s	703 ms
2026-06-13	2.71 s	141 ms	2.04 s	675 ms
2026-06-06	2.72 s	141 ms	2.02 s	659 ms
2026-05-30	2.66 s	140 ms	1.98 s	639 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-08-15

2.59 s

139 ms

2.14 s

853 ms

2026-08-08

2.69 s

149 ms

2.19 s

871 ms

2026-08-01

2.81 s

161 ms

2.25 s

890 ms

2026-07-25

2.90 s

162 ms

2.25 s

879 ms

2026-07-18

2.92 s

165 ms

2.23 s

832 ms

2026-07-11

2.88 s

161 ms

2.19 s

801 ms

2026-07-04

2.81 s

154 ms

2.13 s

750 ms

2026-06-27

2.76 s

152 ms

2.11 s

727 ms

2026-06-20

2.75 s

147 ms

2.09 s

703 ms

2026-06-13

2.71 s

141 ms

2.04 s

675 ms

2026-06-06

2.72 s

141 ms

2.02 s

659 ms

2026-05-30

2.66 s

140 ms

1.98 s

639 ms

Page weight

Metric	Current	Previous	Change	Best	Worst
Page Weight	2.49 MB	—	—	2.49 MB	2.49 MB
Requests	43	—	—	43	43
Third-party Weight	286.9 kB	—	—	286.9 kB	286.9 kB
Third-party CPU	58 ms	—	—	58 ms	58 ms
Unused JS	763.3 kB	—	—	763.3 kB	763.3 kB
Unused CSS	98.9 kB	—	—	98.9 kB	98.9 kB

By resource type

script 1.55 MB · 10 req

image 496.5 kB · 8 req

font 304.6 kB · 7 req

stylesheet 102.4 kB · 1 req

document 27.5 kB · 4 req

other 12.0 kB · 12 req

third party 308.1 kB · 6 req

Third parties 1 entities

286.9 kB transferred, 58 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Stripe 286.9 kB · 58 ms CPU

Page health

Metric	Current	Previous	Change	Best	Worst
Main Thread Work	2.08 s	—	—	2.08 s	2.08 s
Long Tasks	10	—	—	10	10
DOM Elements	438	—	—	438	438
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset	1	—	—	1	1
A11y Failures	0	—	—	0	0
A11y Failing Nodes	0	—	—	0	0

Main thread work

script evaluation 1.16 s

script parse compile 400 ms

other 289 ms

style layout 175 ms

parse HTML 43 ms

paint composite render 21 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 666 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.

serious scrollable-region-focusable — Scrollable region must have keyboard access 1 node

Hygiene

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

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache http/1.1

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 20, 2026, 10:36 PM UTC	58	9.27 s	0	667 ms	2.49 MB	3/3	±2	2,698	38.9s

When

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Aug 20, 2026, 10:36 PM UTC

9.27 s

667 ms

2.49 MB

3/3

±2

2,698

38.9s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show fly.io'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://fly.io/"></speedlify-score>