fly.io

Data from Aug 23, 2026, 1:15 AM UTC 21h old

Web Hosts #7 · 3 measurements · since Aug 20, 2026

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 (2026-07-25 → 2026-08-21). This is what Google measures you on.

LCP 2.54 s needs-improvement

INP 136 ms good

CLS 0 good

Scores

Performance

↓ -1 (-1.8%)

100

Accessibility

no change

Best Practices

↓ -19 (-24.7%)

SEO

no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

375 ms
750 ms
1.13 s
1.50 s
1.88 s
2.25 s
2.63 s
3.00 s

Lab metrics Lighthouse, mobile

Metric	Current	Previous	Change	Best	Worst
LCP Largest Contentful Paint	9.29 s	9.42 s	↓ -130 ms (-1.4%)	9.27 s	9.42 s
CLS Cumulative Layout Shift	0	0	→ no change	0	0
TBT Total Blocking Time	851 ms	824 ms	↑ +27 ms (+3.3%)	667 ms	851 ms
FCP First Contentful Paint	1.51 s	1.51 s	↑ +6 ms (+0.4%)	1.51 s	1.52 s
Speed Index	3.42 s	1.51 s	↑ +1916 ms (+127%) significant	1.51 s	3.42 s
TTFB Time to First Byte	607 ms	604 ms	↑ +3 ms (+0.5%)	604 ms	612 ms

Metric

Current

Change

Best

Worst

Trend

LCP Largest Contentful Paint

9.29 s

9.42 s

↓ -130 ms (-1.4%)

9.27 s

9.42 s

CLS Cumulative Layout Shift

→ no change

TBT Total Blocking Time

851 ms

824 ms

↑ +27 ms (+3.3%)

667 ms

851 ms

FCP First Contentful Paint

1.51 s

↑ +6 ms (+0.4%)

1.51 s

1.52 s

Speed Index

3.42 s

1.51 s

↑ +1916 ms (+127%) significant

1.51 s

3.42 s

TTFB Time to First Byte

607 ms

604 ms

↑ +3 ms (+0.5%)

604 ms

612 ms

What LCP is made of observed, unthrottled

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

Measured on the trace before throttling is modelled, so these are real durations that will not sum to the 9.29 s above — that figure is a simulation of the same load on a slow phone and connection. Read these for the proportions: which phase dominates.

resource load delay 208 ms

element render delay 156 ms

resource load duration 37 ms

time to first byte 11 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-25 → 2026-08-21). This is what Google measures you on.

Metric	p75	Rating	Distribution (good / needs work / poor)
LCP CWV	2.54 s	needs-improvement	74.3% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run	136 ms	good	85.6% good
CLS CWV	0	good	99.6% good
FCP	2.10 s	needs-improvement	66.9% good
TTFB	830 ms	needs-improvement	73.5% good

Metric

p75

Rating

Distribution (good / needs work / poor)

LCP CWV

2.54 s

needs-improvement

74.3% good

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

136 ms

good

85.6% good

CLS CWV

good

99.6% good

FCP

2.10 s

needs-improvement

66.9% good

TTFB

830 ms

needs-improvement

73.5% good

Lab vs field

Lab LCP 9.29 s · field p75 2.54 s · real users are 0.27× 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	2.28 MB	2.45 MB	↓ -171.6 kB (-7.2%) significant	2.28 MB	2.49 MB
Requests	42	44	↓ -2 (-4.5%)	42	44
Third-party Weight	255 kB	245 kB	↑ +10.3 kB (+4.3%)	245 kB	287 kB
Third-party CPU	68 ms	63 ms	↑ +6 ms (+9.1%)	58 ms	68 ms
Unused JS	615 kB	731 kB	↓ -112.8 kB (-15.8%) significant	615 kB	763 kB
Unused CSS	98.9 kB	98.9 kB	→ no change	98.9 kB	98.9 kB

Metric

Current

Change

Best

Worst

Trend

Page Weight

2.28 MB

2.45 MB

↓ -171.6 kB (-7.2%) significant

2.28 MB

2.49 MB

Requests

↓ -2 (-4.5%)

Third-party Weight

255 kB

245 kB

↑ +10.3 kB (+4.3%)

245 kB

287 kB

Third-party CPU

68 ms

63 ms

↑ +6 ms (+9.1%)

58 ms

68 ms

Unused JS

615 kB

731 kB

↓ -112.8 kB (-15.8%) significant

615 kB

763 kB

Unused CSS

98.9 kB

→ no change

98.9 kB

By resource type

script 1.33 MB · 9 req

image 497 kB · 8 req

font 305 kB · 7 req

stylesheet 102 kB · 1 req

document 27.3 kB · 4 req

other 11.9 kB · 12 req

third party 277 kB · 6 req

Third parties 1 entities

255 kB transferred, 68 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Stripe 255 kB · 68 ms CPU

Page health

Metric	Current	Previous	Change	Best	Worst
Main Thread Work	2.85 s	2.66 s	↑ +197 ms (+7.4%)	2.08 s	2.85 s
Long Tasks	9	14	↓ -5 (-35.7%)	9	14
DOM Elements	438	438	→ no change	438	438
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset	1	1	→ no change	1	1
A11y Failures	0	0	→ no change	0	0
A11y Failing Nodes	0	0	→ no change	0	0

Main thread work

script evaluation 1.11 s

other 1.07 s

script parse compile 449 ms

style layout 145 ms

parse HTML 56 ms

paint composite render 24 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	TBT	Weight	Runs	Spread	Bench	Took
Aug 23, 2026, 1:15 AM UTC	54	9.29 s	851 ms	2.28 MB	3/3	±10	2,506	43.7s
Aug 21, 2026, 11:22 PM UTC	55	9.42 s	824 ms	2.45 MB	3/3	±1	2,377	35.5s
Aug 20, 2026, 10:36 PM UTC	58	9.27 s	667 ms	2.49 MB	3/3	±2	2,698	38.9s

When

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Aug 23, 2026, 1:15 AM UTC

9.29 s

851 ms

2.28 MB

3/3

±10

2,506

43.7s

Aug 21, 2026, 11:22 PM UTC

9.42 s

824 ms

2.45 MB

3/3

±1

2,377

35.5s

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 speedlify2-score.js component code into your site!

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://fly.io/"></speedlify2-score>