pypi.org

Ranks Overall #1,281 Developer Tooling #42 Package Managers #6

Data from Oct 9, 2026, 10:13 AM UTC 36h old Measured every 2 days · 21 runs since Aug 25, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 4,257, 71% faster than this project's median of 2,487. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Uses Font Awesome

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 4.62 s. Compare this filmstrip against another site.

578 ms
1.16 s
1.73 s
2.31 s
2.66 s
3.47 s
4.04 s
4.62 s

Lighthouse Scores LAB Simulated

Performance

no change

Accessibility

no change

Best Practices

no change

100

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 (2026-09-10 → 2026-10-07), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	3.34 s needs work	↓ -13 ms (-0.4%) 3.20 s – 4.28 s	1.34 s good	91.2% 4.6% 4.2%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	111 ms good	90.4% 7.7% 1.9%
CLS CWV Cumulative Layout Shift	0.070 good	→ no change 0.070 – 0.331	0 good	93.9% 5.5% 0.6%
TBT Total Blocking Time	0 ms good	→ no change 0 ms – 20 ms	n/a	—
FCP First Contentful Paint	1.81 s needs work	↑ +2 ms (+0.1%) 1.81 s – 2.71 s	1.38 s good	83.6% 9.4% 7%
Speed Index	1.81 s good	↑ +2 ms (+0.1%) 1.81 s – 2.71 s	n/a	—
TTFB Time to First Byte	612 ms good	↑ +2 ms (+0.3%) 602 ms – 619 ms	655 ms good	80.6% 13.2% 6.3%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

3.34 s needs work

↓ -13 ms (-0.4%) 3.20 s – 4.28 s

1.34 s good

91.2% 4.6% 4.2%

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

n/a

—

111 ms good

90.4% 7.7% 1.9%

CLS CWV Cumulative Layout Shift

0.070 good

→ no change 0.070 – 0.331

0 good

93.9% 5.5% 0.6%

TBT Total Blocking Time

0 ms good

→ no change 0 ms – 20 ms

n/a

—

FCP First Contentful Paint

1.81 s needs work

↑ +2 ms (+0.1%) 1.81 s – 2.71 s

1.38 s good

83.6% 9.4% 7%

Speed Index

1.81 s good

↑ +2 ms (+0.1%) 1.81 s – 2.71 s

n/a

—

TTFB Time to First Byte

612 ms good

↑ +2 ms (+0.3%) 602 ms – 619 ms

655 ms good

80.6% 13.2% 6.3%

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.

element render delay 2.08 s

time to first byte 576 ms

LCP LAB Simulated vs LCP FIELD

Lab 3.34 s

Field p75 1.34 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	567 kB	↑ +48 B 557 kB – 589 kB
Requests	19	→ no change 19 – 21
Third-party Weight	12.4 kB	↑ +25 B (+0.2%) 12.4 kB – 13.3 kB
Third-party CPU	4 ms	↓ -2 ms (-30.9%) significant 4 ms – 6 ms
Unused JS	73.4 kB	→ no change 68.7 kB – 73.5 kB
Unused CSS	196 kB	→ no change 191 kB – 196 kB

Metric

Value

Change / range

Trend

Page Weight

567 kB

↑ +48 B 557 kB – 589 kB

Requests

→ no change 19 – 21

Third-party Weight

12.4 kB

↑ +25 B (+0.2%) 12.4 kB – 13.3 kB

Third-party CPU

4 ms

↓ -2 ms (-30.9%) significant 4 ms – 6 ms

Unused JS

73.4 kB

→ no change 68.7 kB – 73.5 kB

Unused CSS

196 kB

→ no change 191 kB – 196 kB

By resource type

Type	Share	Size	Requests
stylesheet	36.9%	209 kB	3
font	28.9%	164 kB	4
script	21.9%	124 kB	4
image	9.7%	55.1 kB	2
other	1.3%	7.7 kB	5
document	1.3%	7.1 kB	1
Total		567 kB	19

Third parties 3 entities

Entity	Transfer	Size	Main thread Simulated
ethicalads.io	script	8.4 kB	2 ms
python.org	script	2.8 kB	2 ms
Statuspage		1.2 kB	0 ms
Total		12.4 kB	4 ms

Entity

Transfer

Size

Main thread Simulated

ethicalads.io

script

8.4 kB

2 ms

python.org

script

2.8 kB

2 ms

Statuspage

1.2 kB

0 ms

Total

12.4 kB

4 ms

Without JavaScript

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

53.5% of pixels differ — the page changes substantially. 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	303 ms	↓ -124 ms (-29%) significant 303 ms – 536 ms
Long Tasks	0	→ no change 0 – 2
DOM Elements	254	→ no change 215 – 254
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	41	→ no change 8 – 41
A11y Failures	1	→ no change 1 – 1
A11y Failing Nodes	14	→ no change 14 – 15

Metric

Value

Change / range

Trend

Main Thread Work

303 ms

↓ -124 ms (-29%) significant 303 ms – 536 ms

Long Tasks

→ no change 0 – 2

DOM Elements

254

→ no change 215 – 254

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

→ no change 8 – 41

A11y Failures

→ no change 1 – 1

A11y Failing Nodes

→ no change 14 – 15

Main thread work

Task	Share	Duration Simulated
other	35%	106 ms
style layout	25%	77 ms
script evaluation	25%	76 ms
paint composite render	6%	17 ms
parse HTML	5%	16 ms
script parse compile	4%	12 ms
Total		303 ms

Task

Time

Duration Simulated

other

35%

106 ms

style layout

25%

77 ms

script evaluation

25%

76 ms

paint composite render

17 ms

parse HTML

16 ms

script parse compile

12 ms

Total

303 ms

Axe violations axe-core 4.13.0, full rule set

41 violating nodes across 2 rules, 401 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 27 nodes
Offending elements (5 of 27)
1. a[href$="anthropic.com/"] > .sponsors__name
```
Anthropic, PBC
```
2. a[href$="anthropic.com/"] > .sponsors__description
```
Visionary sponsor
```
3. .sponsors__sponsor[target="_blank"][rel="noopener"]:nth-child(2) > .sponsors__name
```
Bloomberg
```
4. .sponsors__sponsor[target="_blank"][rel="noopener"]:nth-child(2) > .sponsors__description
```
Visionary sponsor
```
5. .sponsors__sponsor[target="_blank"][rel="noopener"]:nth-child(3) > .sponsors__name
```
Hudson River Trading
```
serious color-contrast — Elements must meet minimum color contrast ratio thresholds 14 nodes
Offending elements (5 of 14)
1. .footer__tagline
```
Developed and maintained by the <a href="https://www.python.org/psf/" title="External link" target="_blank" rel="noopener">Python Software Foundation</a> and Python communi…
```
2. a[href$="anthropic.com/"] > .sponsors__description
```
Visionary sponsor
```
3. .sponsors__sponsor[target="_blank"][rel="noopener"]:nth-child(2) > .sponsors__description
```
Visionary sponsor
```
4. .sponsors__sponsor[target="_blank"][rel="noopener"]:nth-child(3) > .sponsors__description
```
Visionary sponsor
```
5. .sponsors__sponsor[target="_blank"][rel="noopener"]:nth-child(4) > .sponsors__description
```
Visionary sponsor
```

Accessibility failures 1 of 29 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 14 nodes

Best Practices failures 1 of 17 audits

errors-in-console — Browser errors were logged to the console 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 1 console error

Measurement log

Field history 25 weeks

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

Week ending	LCP	INP	FCP	TTFB
2026-10-03	1.33 s	112 ms	1.36 s	655 ms
2026-09-26	1.31 s	112 ms	1.34 s	656 ms
2026-09-19	1.38 s	115 ms	1.41 s	705 ms
2026-09-12	1.47 s	120 ms	1.49 s	752 ms
2026-09-05	1.56 s	122 ms	1.58 s	798 ms
2026-08-29	1.63 s	126 ms	1.65 s	840 ms
2026-08-22	1.74 s	126 ms	1.75 s	912 ms
2026-08-15	1.84 s	127 ms	1.86 s	982 ms
2026-08-08	1.83 s	125 ms	1.85 s	979 ms
2026-08-01	1.80 s	121 ms	1.82 s	972 ms
2026-07-25	1.68 s	118 ms	1.71 s	909 ms
2026-07-18	1.42 s	114 ms	1.45 s	749 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-10-03

1.33 s

112 ms

1.36 s

655 ms

2026-09-26

1.31 s

112 ms

1.34 s

656 ms

2026-09-19

1.38 s

115 ms

1.41 s

705 ms

2026-09-12

1.47 s

120 ms

1.49 s

752 ms

2026-09-05

1.56 s

122 ms

1.58 s

798 ms

2026-08-29

1.63 s

126 ms

1.65 s

840 ms

2026-08-22

1.74 s

126 ms

1.75 s

912 ms

2026-08-15

1.84 s

127 ms

1.86 s

982 ms

2026-08-08

1.83 s

125 ms

1.85 s

979 ms

2026-08-01

1.80 s

121 ms

1.82 s

972 ms

2026-07-25

1.68 s

118 ms

1.71 s

909 ms

2026-07-18

1.42 s

114 ms

1.45 s

749 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 9, 2026, 10:13 AM UTC	90	3.34 s	0.070	0 ms	567 kB	3/3	±4	4,257 +71%	70.5s	Wayback
Oct 7, 2026, 9:54 AM UTC	90	3.36 s	0.070	0 ms	567 kB	3/3	±4	2,431 -2%	73.9s	Wayback
Oct 5, 2026, 8:33 AM UTC	90	3.36 s	0.070	0 ms	566 kB	3/3	±4	3,322 +34%	71.4s	Wayback
Oct 1, 2026, 12:24 AM UTC	90	3.35 s	0.070	0 ms	566 kB	3/3	±4	2,500 +1%	72.7s	Wayback
Sep 29, 2026, 12:00 AM UTC	82	3.95 s	0.070	0 ms	567 kB	3/3	±0	2,509 +1%	44.1s	Wayback
Sep 25, 2026, 4:47 PM UTC	81	4.10 s	0.070	0 ms	565 kB	3/3	±8	2,509 +1%	72.9s	Wayback
Sep 23, 2026, 10:50 AM UTC	91	3.20 s	0.070	0 ms	589 kB	3/3	±3	3,437 +38%	97.5s	Wayback
Sep 21, 2026, 7:39 AM UTC	81	4.10 s	0.070	0 ms	565 kB	3/3	±1	2,500 +1%	75s	Wayback
Sep 18, 2026, 5:34 PM UTC	91	3.20 s	0.070	0 ms	558 kB	3/3	±3	2,920 +17%	71.4s	Wayback
Sep 16, 2026, 9:15 AM UTC	81	4.10 s	0.070	0 ms	557 kB	3/3	±10	2,466 -1%	73.4s	Wayback
Sep 14, 2026, 5:54 AM UTC	90	3.35 s	0.070	0 ms	557 kB	3/3	±4	3,248 +31%	72.1s	Wayback
Sep 11, 2026, 11:26 PM UTC	81	4.10 s	0.070	0 ms	557 kB	3/3	±5	2,384 -4%	73.2s	Wayback
Sep 9, 2026, 8:30 PM UTC	90	3.35 s	0.070	0 ms	557 kB	3/3	±13	2,230 -10%	22.1s	Wayback
Sep 7, 2026, 7:04 PM UTC	81	4.10 s	0.070	0 ms	557 kB	3/3	±3	2,332 -6%	51.3s	Wayback
Sep 5, 2026, 12:47 PM UTC	81	4.10 s	0.070	0 ms	557 kB	3/3	±1	2,482 0%	52.7s	Wayback
Sep 4, 2026, 10:50 AM UTC	81	4.10 s	0.070	1 ms	560 kB	3/3	±1	2,478 0%	51.8s	Wayback
Sep 3, 2026, 1:09 AM UTC	66	4.09 s	0.328	0 ms	557 kB	3/3	±0	3,006 +21%	20.4s	Wayback
Sep 1, 2026, 11:09 PM UTC	75	3.35 s	0.328	0 ms	557 kB	3/3	±5	2,617 +5%	53s	Wayback
Aug 31, 2026, 9:27 PM UTC	68	3.96 s	0.328	1 ms	557 kB	3/3	±3	2,485 0%	22.8s	Wayback
Aug 26, 2026, 7:04 PM UTC	65	4.26 s	0.331	5 ms	575 kB	3/3	±0	2,460 -1%	52.1s	Wayback
Aug 25, 2026, 4:37 PM UTC	65	4.28 s	0.331	20 ms	576 kB	3/3	±6	2,506 +1%	51.7s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Stack

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 3 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 1 of 29 audits

Best Practices failures 1 of 17 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