pub.dev

Ranks Overall #963 Developer Tooling #22 Package Managers #5

Data from Oct 16, 2026, 3:34 PM UTC 22h old Measured every 2 days · 25 runs since Aug 25, 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).

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.10 s. Compare this filmstrip against another site.

387 ms
774 ms
1.16 s
1.55 s
1.93 s
2.32 s
2.71 s
3.10 s

Lighthouse Scores LAB Simulated

Performance

↓ -3 (-3.5%)

Accessibility

no change

100

Best Practices

no change

100

SEO

↑ +8 (+8.7%)

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 (2026-09-17 → 2026-10-14), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	3.87 s needs work	↑ +630 ms (+19.4%) 3.07 s – 4.88 s	1.79 s good	85.8% 8.7% 5.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	98 ms good	90.6% 8.9% 0.5%
CLS CWV Cumulative Layout Shift	0.001 good	→ no change 0 – 0.003	0 good	99.8% 0.1% 0.1%
TBT Total Blocking Time	134 ms good	↓ -74 ms (-35.6%) significant 42 ms – 208 ms	n/a	—
FCP First Contentful Paint	2.62 s needs work	↑ +150 ms (+6.1%) significant 2.44 s – 2.64 s	1.73 s good	76.3% 14.6% 9.2%
Speed Index	2.62 s good	↑ +150 ms (+6.1%) significant 2.44 s – 2.64 s	n/a	—
TTFB Time to First Byte	608 ms good	→ no change 605 ms – 643 ms	880 ms needs work	71.2% 21.7% 7.2%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

3.87 s needs work

↑ +630 ms (+19.4%) 3.07 s – 4.88 s

1.79 s good

85.8% 8.7% 5.5%

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

n/a

—

98 ms good

90.6% 8.9% 0.5%

CLS CWV Cumulative Layout Shift

0.001 good

→ no change 0 – 0.003

0 good

99.8% 0.1% 0.1%

TBT Total Blocking Time

134 ms good

↓ -74 ms (-35.6%) significant 42 ms – 208 ms

n/a

—

FCP First Contentful Paint

2.62 s needs work

↑ +150 ms (+6.1%) significant 2.44 s – 2.64 s

1.73 s good

76.3% 14.6% 9.2%

Speed Index

2.62 s good

↑ +150 ms (+6.1%) significant 2.44 s – 2.64 s

n/a

—

TTFB Time to First Byte

608 ms good

→ no change 605 ms – 643 ms

880 ms needs work

71.2% 21.7% 7.2%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

resource load duration 898 ms

time to first byte 605 ms

element render delay 531 ms

LCP LAB Simulated vs LCP FIELD

Lab 3.87 s

Field p75 1.79 s

The lab LCP is 2.17× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	649 kB	↓ -39.3 kB (-5.8%) significant 630 kB – 689 kB
Requests	38	↓ -2 (-5%) significant 38 – 43
Third-party Weight	387 kB	↓ -37.4 kB (-9%) significant 373 kB – 426 kB
Third-party CPU	92 ms	↓ -14 ms (-13%) 54 ms – 112 ms
Unused JS	196 kB	↑ +1.1 kB (+0.6%) 192 kB – 198 kB
Unused CSS	12.3 kB	↓ -7 B (-0.1%) 12.3 kB – 12.3 kB

Metric

Value

Change / range

Trend

Page Weight

649 kB

↓ -39.3 kB (-5.8%) significant 630 kB – 689 kB

Requests

↓ -2 (-5%) significant 38 – 43

Third-party Weight

387 kB

↓ -37.4 kB (-9%) significant 373 kB – 426 kB

Third-party CPU

92 ms

↓ -14 ms (-13%) 54 ms – 112 ms

Unused JS

196 kB

↑ +1.1 kB (+0.6%) 192 kB – 198 kB

Unused CSS

12.3 kB

↓ -7 B (-0.1%) 12.3 kB – 12.3 kB

By resource type

Type	Share	Size	Requests
script	71%	460 kB	16
image	10.5%	68.3 kB	10
other	7.4%	47.7 kB	4
font	7.1%	45.9 kB	2
stylesheet	3.1%	20.1 kB	3
document	1%	6.5 kB	1
Total		649 kB	38

Third parties 4 entities

Entity	Transfer	Size	Main thread Simulated
Google Tag Manager	script	304 kB	74 ms
Google Fonts	font	49.4 kB	0 ms
Google Analytics		20.9 kB	13 ms
Google CDN		12.9 kB	5 ms
Total		387 kB	92 ms

Entity

Transfer

Size

Main thread Simulated

Google Tag Manager

script

304 kB

74 ms

Google Fonts

font

49.4 kB

0 ms

Google Analytics

20.9 kB

13 ms

Google CDN

12.9 kB

5 ms

Total

387 kB

92 ms

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

0.1% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric	Value	Change / range
Main Thread Work	1.25 s	↓ -182 ms (-12.7%) significant 904 ms – 1.51 s
Long Tasks	5	↓ -1 (-16.7%) 3 – 6
DOM Elements	338	↓ -12 (-3.4%) 338 – 350
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	3	→ no change 3 – 3
A11y Failures	2	→ no change 2 – 2
A11y Failing Nodes	2	→ no change 2 – 2

Metric

Value

Change / range

Trend

Main Thread Work

1.25 s

↓ -182 ms (-12.7%) significant 904 ms – 1.51 s

Long Tasks

↓ -1 (-16.7%) 3 – 6

DOM Elements

338

↓ -12 (-3.4%) 338 – 350

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

→ no change 3 – 3

A11y Failures

→ no change 2 – 2

A11y Failing Nodes

→ no change 2 – 2

Main thread work

Task	Share	Duration Simulated
script evaluation	41%	513 ms
other	34%	427 ms
style layout	10%	128 ms
script parse compile	10%	120 ms
paint composite render	2%	25 ms
garbage collection	2%	20 ms
parse HTML	1%	17 ms
Total		1.25 s

Task

Time

Duration Simulated

script evaluation

41%

513 ms

other

34%

427 ms

style layout

10%

128 ms

script parse compile

10%

120 ms

paint composite render

25 ms

garbage collection

20 ms

parse HTML

17 ms

Total

1.25 s

Axe violations axe-core 4.13.0, full rule set

3 violating nodes across 3 rules, 876 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

serious label-title-only — Form elements should have a visible label 1 node

Offending element

input

<input class="input" type="search" name="q" placeholder="Search packages" autocomplete="off" autofocus="autofocus" title="Search" data-widget="completion" data-completion-src="/api/search-input-co...…

serious link-in-text-block — Links must be distinguishable without relying on color 1 node
Offending element
1. .home-block-context-info > a[rel="noopener"][target="_blank"]
```
<a href="https://flutter.dev/docs/development/packages-and-plugins/favorites" rel="noopener" target="_blank">highest levels of quality</a>
```
moderate region — All page content should be contained by landmarks 1 node
Offending element
1. ._banner-bg
```
<div class="_banner-bg pub-dark-bg">
```

Accessibility failures 2 of 26 audits

link-in-text-block — Links rely on color to be distinguishable. 1 node
target-size — Touch targets do not have sufficient size or spacing. 1 node

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
2026-10-10	1.79 s	99 ms	1.73 s	870 ms
2026-10-03	1.81 s	102 ms	1.75 s	908 ms
2026-09-26	1.76 s	99 ms	1.70 s	910 ms
2026-09-19	1.74 s	98 ms	1.65 s	899 ms
2026-09-12	1.70 s	96 ms	1.60 s	893 ms
2026-09-05	1.68 s	94 ms	1.57 s	859 ms
2026-08-29	1.72 s	95 ms	1.60 s	865 ms
2026-08-22	1.72 s	96 ms	1.62 s	859 ms
2026-08-15	1.73 s	99 ms	1.64 s	875 ms
2026-08-08	1.69 s	98 ms	1.62 s	863 ms
2026-08-01	1.67 s	98 ms	1.59 s	861 ms
2026-07-25	1.70 s	99 ms	1.62 s	886 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-10-10

1.79 s

99 ms

1.73 s

870 ms

2026-10-03

1.81 s

102 ms

1.75 s

908 ms

2026-09-26

1.76 s

99 ms

1.70 s

910 ms

2026-09-19

1.74 s

98 ms

1.65 s

899 ms

2026-09-12

1.70 s

96 ms

1.60 s

893 ms

2026-09-05

1.68 s

94 ms

1.57 s

859 ms

2026-08-29

1.72 s

95 ms

1.60 s

865 ms

2026-08-22

1.72 s

96 ms

1.62 s

859 ms

2026-08-15

1.73 s

99 ms

1.64 s

875 ms

2026-08-08

1.69 s

98 ms

1.62 s

863 ms

2026-08-01

1.67 s

98 ms

1.59 s

861 ms

2026-07-25

1.70 s

99 ms

1.62 s

886 ms

Runs

Every stored run for this URL, newest first.

When Scores Perf LCP CLS TBT Weight Runs Spread Bench Took Archive

Oct 16, 2026, 3:34 PM UTC 83 3.87 s 0.001 134 ms 649 kB 3/3 ±10 2,533 +2% 48.8s Wayback

Oct 14, 2026, 11:31 AM UTC 86 3.24 s 0.001 208 ms 689 kB 3/3 ±31 2,496 0% 53.8s Wayback

Oct 10, 2026, 11:40 PM UTC 88 3.23 s 0 145 ms 649 kB 3/3 ±6 2,447 -2% 52.9s Wayback

Oct 8, 2026, 10:08 AM UTC 88 3.23 s 0.001 132 ms 647 kB 3/3 ±0 2,501 +1% 49.3s Wayback

Oct 6, 2026, 5:12 AM UTC 90 3.07 s 0.001 45 ms 648 kB 3/3 ±3 3,668 +47% 45.4s Wayback

Oct 1, 2026, 8:11 PM UTC 88 3.22 s 0.001 135 ms 647 kB 3/3 ±7 2,351 -5% 48.9s Wayback

Sep 29, 2026, 5:45 PM UTC 91 3.07 s 0.003 42 ms 644 kB 3/3 ±10 4,357 +75% 44.8s Wayback

Sep 26, 2026, 6:29 PM UTC 88 3.25 s 0.001 160 ms 647 kB 3/3 ±1 2,703 +9% 48.5s Wayback

Sep 24, 2026, 1:29 PM UTC 88 3.23 s 0.001 140 ms 643 kB 2/3 ±0 2,477 0% 50.1s Wayback

Sep 22, 2026, 9:23 AM UTC 80 4.68 s 0.001 68 ms 637 kB 3/3 ±0 2,978 +20% 46.3s Wayback

Sep 21, 2026, 7:58 AM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 43.8s

Sep 18, 2026, 11:22 PM UTC 82 4.17 s 0.001 116 ms 637 kB 3/3 ±3 2,342 -6% 50s Wayback

Sep 16, 2026, 7:00 PM UTC 77 4.88 s 0 139 ms 642 kB 3/3 ±15 2,500 +1% 52.9s Wayback

Sep 14, 2026, 6:10 PM UTC 81 4.23 s 0.001 124 ms 640 kB 3/3 ±10 2,618 +5% 51.8s Wayback

Sep 12, 2026, 3:07 PM UTC 82 3.90 s 0.003 182 ms 636 kB 3/3 ±14 2,573 +3% 53.1s Wayback

Sep 10, 2026, 10:42 AM UTC 89 3.07 s 0.001 133 ms 636 kB 3/3 ±1 2,446 -2% 26.8s Wayback

Sep 8, 2026, 5:39 AM UTC 88 3.22 s 0.001 131 ms 634 kB 3/3 ±1 2,490 0% 29.1s Wayback

Sep 6, 2026, 12:57 AM UTC 82 4.26 s 0.001 107 ms 639 kB 3/3 ±9 3,267 +31% 25.3s Wayback

Sep 4, 2026, 9:23 PM UTC 89 3.22 s 0.001 122 ms 639 kB 3/3 ±1 2,588 +4% 26.3s Wayback

Sep 3, 2026, 4:02 PM UTC 81 3.95 s 0.001 189 ms 639 kB 3/3 ±6 2,836 +14% 27.4s Wayback

Sep 2, 2026, 1:18 PM UTC 88 3.23 s 0.003 137 ms 635 kB 3/3 ±1 2,468 -1% 29.1s Wayback

Sep 1, 2026, 1:15 PM UTC 88 3.23 s 0.001 130 ms 639 kB 3/3 ±1 2,314 -7% 26.7s Wayback

Aug 31, 2026, 10:49 AM UTC 88 3.25 s 0.001 127 ms 638 kB 3/3 ±2 2,351 -5% 27s Wayback

Aug 26, 2026, 7:04 PM UTC 81 4.00 s 0.001 191 ms 635 kB 3/3 ±14 2,492 0% 29.1s Wayback

Aug 25, 2026, 4:37 PM UTC 87 3.32 s 0.003 162 ms 630 kB 3/3 ±12 2,286 -8% 26.7s Wayback

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 16, 2026, 3:34 PM UTC	83	3.87 s	0.001	134 ms	649 kB	3/3	±10	2,533 +2%	48.8s	Wayback
Oct 14, 2026, 11:31 AM UTC	86	3.24 s	0.001	208 ms	689 kB	3/3	±31	2,496 0%	53.8s	Wayback
Oct 10, 2026, 11:40 PM UTC	88	3.23 s	0	145 ms	649 kB	3/3	±6	2,447 -2%	52.9s	Wayback
Oct 8, 2026, 10:08 AM UTC	88	3.23 s	0.001	132 ms	647 kB	3/3	±0	2,501 +1%	49.3s	Wayback
Oct 6, 2026, 5:12 AM UTC	90	3.07 s	0.001	45 ms	648 kB	3/3	±3	3,668 +47%	45.4s	Wayback
Oct 1, 2026, 8:11 PM UTC	88	3.22 s	0.001	135 ms	647 kB	3/3	±7	2,351 -5%	48.9s	Wayback
Sep 29, 2026, 5:45 PM UTC	91	3.07 s	0.003	42 ms	644 kB	3/3	±10	4,357 +75%	44.8s	Wayback
Sep 26, 2026, 6:29 PM UTC	88	3.25 s	0.001	160 ms	647 kB	3/3	±1	2,703 +9%	48.5s	Wayback
Sep 24, 2026, 1:29 PM UTC	88	3.23 s	0.001	140 ms	643 kB	2/3	±0	2,477 0%	50.1s	Wayback
Sep 22, 2026, 9:23 AM UTC	80	4.68 s	0.001	68 ms	637 kB	3/3	±0	2,978 +20%	46.3s	Wayback
Sep 21, 2026, 7:58 AM UTC	`TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse.`	43.8s
Sep 18, 2026, 11:22 PM UTC	82	4.17 s	0.001	116 ms	637 kB	3/3	±3	2,342 -6%	50s	Wayback
Sep 16, 2026, 7:00 PM UTC	77	4.88 s	0	139 ms	642 kB	3/3	±15	2,500 +1%	52.9s	Wayback
Sep 14, 2026, 6:10 PM UTC	81	4.23 s	0.001	124 ms	640 kB	3/3	±10	2,618 +5%	51.8s	Wayback
Sep 12, 2026, 3:07 PM UTC	82	3.90 s	0.003	182 ms	636 kB	3/3	±14	2,573 +3%	53.1s	Wayback
Sep 10, 2026, 10:42 AM UTC	89	3.07 s	0.001	133 ms	636 kB	3/3	±1	2,446 -2%	26.8s	Wayback
Sep 8, 2026, 5:39 AM UTC	88	3.22 s	0.001	131 ms	634 kB	3/3	±1	2,490 0%	29.1s	Wayback
Sep 6, 2026, 12:57 AM UTC	82	4.26 s	0.001	107 ms	639 kB	3/3	±9	3,267 +31%	25.3s	Wayback
Sep 4, 2026, 9:23 PM UTC	89	3.22 s	0.001	122 ms	639 kB	3/3	±1	2,588 +4%	26.3s	Wayback
Sep 3, 2026, 4:02 PM UTC	81	3.95 s	0.001	189 ms	639 kB	3/3	±6	2,836 +14%	27.4s	Wayback
Sep 2, 2026, 1:18 PM UTC	88	3.23 s	0.003	137 ms	635 kB	3/3	±1	2,468 -1%	29.1s	Wayback
Sep 1, 2026, 1:15 PM UTC	88	3.23 s	0.001	130 ms	639 kB	3/3	±1	2,314 -7%	26.7s	Wayback
Aug 31, 2026, 10:49 AM UTC	88	3.25 s	0.001	127 ms	638 kB	3/3	±2	2,351 -5%	27s	Wayback
Aug 26, 2026, 7:04 PM UTC	81	4.00 s	0.001	191 ms	635 kB	3/3	±14	2,492 0%	29.1s	Wayback
Aug 25, 2026, 4:37 PM UTC	87	3.32 s	0.003	162 ms	630 kB	3/3	±12	2,286 -8%	26.7s	Wayback

Filmstrip LAB 🐢 Throttled

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐢 Throttled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 4 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 2 of 26 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Filmstrip LAB Throttled

Lighthouse Scores LAB Simulated

LCP Subparts LAB Throttled

LCP LAB Simulated vs LCP FIELD