pages.github.com

https://pages.github.com/

Ranks Overall #837 Developer Tooling #18 Web Hosts #1

Data from Sep 14, 2026, 6:21 AM UTC 25h old Measured every 2 days · 16 runs since Aug 21, 2026

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

This URL redirects to https://docs.github.com/en/pages.

Lighthouse follows the redirect, so the numbers below describe the destination page, not this one. The redirect is temporary (302/303/307), so it is treated as a detour rather than a move and history stays here.

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

Stack

Built with Next.js

Uses React

Hosted by GitHub Pages

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.31 s. Compare this filmstrip against another site.

413 ms
827 ms
1.24 s
1.65 s
2.07 s
2.48 s
2.89 s
3.31 s

Lighthouse Scores LAB Simulated

Performance

↑ +4 (+6.5%)

100

Accessibility

no change

Best Practices

no change

100

SEO

no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-15 → 2026-09-11), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	10.20 s poor	↑ +750 ms (+7.9%) significant 8.87 s – 10.66 s	1.86 s good	85% 8.5% 6.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	355 ms needs work	7.1% 86.3% 6.7%
CLS CWV Cumulative Layout Shift	0 good	→ no change 0 – 0.171	0 good	83.6% 15.6% 0.8%
TBT Total Blocking Time	291 ms needs work	↓ -108 ms (-27.1%) 211 ms – 570 ms	n/a	—
FCP First Contentful Paint	2.41 s needs work	↓ -22 ms (-0.9%) 2.40 s – 2.48 s	1.60 s good	79.9% 12.2% 7.9%
Speed Index	2.41 s good	↓ -22 ms (-0.9%) 2.40 s – 2.48 s	n/a	—
TTFB Time to First Byte	602 ms good	↓ -5 ms (-0.8%) 602 ms – 618 ms	784 ms good	75.7% 16.4% 8%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

10.20 s poor

↑ +750 ms (+7.9%) significant 8.87 s – 10.66 s

1.86 s good

85% 8.5% 6.5%

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

n/a

—

355 ms needs work

7.1% 86.3% 6.7%

CLS CWV Cumulative Layout Shift

0 good

→ no change 0 – 0.171

0 good

83.6% 15.6% 0.8%

TBT Total Blocking Time

291 ms needs work

↓ -108 ms (-27.1%) 211 ms – 570 ms

n/a

—

FCP First Contentful Paint

2.41 s needs work

↓ -22 ms (-0.9%) 2.40 s – 2.48 s

1.60 s good

79.9% 12.2% 7.9%

Speed Index

2.41 s good

↓ -22 ms (-0.9%) 2.40 s – 2.48 s

n/a

—

TTFB Time to First Byte

602 ms good

↓ -5 ms (-0.8%) 602 ms – 618 ms

784 ms good

75.7% 16.4% 8%

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 5.17 s

time to first byte 566 ms

resource load delay 26 ms

element render delay 14 ms

LCP LAB Simulated vs LCP FIELD

Lab 10.20 s

Field p75 1.86 s

The lab LCP is 5.48× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	3.45 MB	↓ -1.6 kB 3.45 MB – 3.61 MB
Requests	56	↓ -1 (-1.8%) 55 – 57
Third-party Weight	0 B	→ no change 0 B – 0 B
Third-party CPU	0 ms	→ no change 0 ms – 0 ms
Unused JS	112 kB	↓ -28.5 kB (-20.6%) 112 kB – 210 kB
Unused CSS	120 kB	→ no change 118 kB – 120 kB

Metric

Value

Change / range

Trend

Page Weight

3.45 MB

↓ -1.6 kB 3.45 MB – 3.61 MB

Requests

↓ -1 (-1.8%) 55 – 57

Third-party Weight

0 B

→ no change 0 B – 0 B

Third-party CPU

0 ms

→ no change 0 ms – 0 ms

Unused JS

112 kB

↓ -28.5 kB (-20.6%) 112 kB – 210 kB

Unused CSS

120 kB

→ no change 118 kB – 120 kB

By resource type

Type	Share	Size	Requests
image	79.6%	2.75 MB	17
script	14.6%	505 kB	20
stylesheet	4.6%	157 kB	6
document	0.6%	22.3 kB	2
other	0.5%	16.6 kB	10
font	0.1%	3.7 kB	1
Total		3.45 MB	56

Without JavaScript

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

0% of pixels differ — they are 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	2.11 s	↑ +301 ms (+16.7%) significant 1.81 s – 2.11 s
Long Tasks	9	↑ +3 (+50%) significant 6 – 9
DOM Elements	235	→ no change 235 – 236
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	0	→ no change 0 – 0
A11y Failures	0	→ no change 0 – 0
A11y Failing Nodes	0	→ no change 0 – 0

Metric

Value

Change / range

Trend

Main Thread Work

2.11 s

↑ +301 ms (+16.7%) significant 1.81 s – 2.11 s

Long Tasks

↑ +3 (+50%) significant 6 – 9

DOM Elements

235

→ no change 235 – 236

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

→ no change 0 – 0

A11y Failures

→ no change 0 – 0

A11y Failing Nodes

→ no change 0 – 0

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 553 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Best Practices failures 2 of 18 audits

errors-in-console — Browser errors were logged to the console 1 item
valid-source-maps — Missing source maps for large first-party JavaScript 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
2026-09-05	1.86 s	355 ms	1.60 s	784 ms
2026-08-29	1.85 s	356 ms	1.60 s	774 ms
2026-08-22	1.86 s	360 ms	1.61 s	779 ms
2026-08-15	1.87 s	360 ms	1.62 s	776 ms
2026-08-08	1.88 s	363 ms	1.62 s	773 ms
2026-08-01	1.89 s	363 ms	1.63 s	783 ms
2026-07-25	1.89 s	362 ms	1.63 s	783 ms
2026-07-18	1.90 s	362 ms	1.63 s	783 ms
2026-07-11	1.92 s	363 ms	1.65 s	788 ms
2026-07-04	1.94 s	362 ms	1.67 s	792 ms
2026-06-27	1.95 s	361 ms	1.68 s	791 ms
2026-06-20	1.95 s	361 ms	1.68 s	786 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-05

1.86 s

355 ms

1.60 s

784 ms

2026-08-29

1.85 s

356 ms

1.60 s

774 ms

2026-08-22

1.86 s

360 ms

1.61 s

779 ms

2026-08-15

1.87 s

360 ms

1.62 s

776 ms

2026-08-08

1.88 s

363 ms

1.62 s

773 ms

2026-08-01

1.89 s

363 ms

1.63 s

783 ms

2026-07-25

1.89 s

362 ms

1.63 s

783 ms

2026-07-18

1.90 s

362 ms

1.63 s

783 ms

2026-07-11

1.92 s

363 ms

1.65 s

788 ms

2026-07-04

1.94 s

362 ms

1.67 s

792 ms

2026-06-27

1.95 s

361 ms

1.68 s

791 ms

2026-06-20

1.95 s

361 ms

1.68 s

786 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Sep 14, 2026, 6:21 AM UTC	66	10.20 s	0	291 ms	3.45 MB	3/3	±0	2,908 +17%	65s	Wayback
Sep 11, 2026, 11:33 PM UTC	62	9.45 s	0	399 ms	3.46 MB	3/3	±4	2,248 -9%	69.5s	Wayback
Sep 9, 2026, 10:58 PM UTC	68	9.94 s	0.016	211 ms	3.61 MB	3/3	±2	3,486 +40%	24.6s	Wayback
Sep 7, 2026, 10:32 PM UTC	65	9.46 s	0	316 ms	3.45 MB	3/3	±8	2,909 +17%	71.2s	Wayback
Sep 5, 2026, 12:31 PM UTC	66	9.45 s	0	294 ms	3.45 MB	3/3	±15	2,917 +18%	71.4s	Wayback
Sep 4, 2026, 1:05 AM UTC	59	10.38 s	0	505 ms	3.45 MB	3/3	±13	2,344 -6%	206.9s	Wayback
Sep 2, 2026, 11:17 PM UTC	59	9.49 s	0	497 ms	3.45 MB	3/3	±11	2,333 -6%	28.2s	Wayback
Sep 1, 2026, 10:47 PM UTC	57	9.41 s	0.171	308 ms	3.45 MB	3/3	±15	2,496 +1%	28.1s	Wayback
Aug 31, 2026, 9:04 PM UTC	62	9.51 s	0	393 ms	3.45 MB	3/3	±7	2,328 -6%	207.1s	Wayback
Aug 27, 2026, 4:06 PM UTC	62	9.48 s	0	400 ms	3.45 MB	3/3	±33	2,239 -10%	34.6s	Wayback
Aug 26, 2026, 7:45 AM UTC	58	8.87 s	0	570 ms	3.45 MB	3/3	±4	2,221 -11%	209.9s	Wayback
Aug 25, 2026, 7:43 AM UTC	60	9.92 s	0	458 ms	3.60 MB	3/3	±1	2,199 -11%	74.2s	Wayback
Aug 24, 2026, 6:56 AM UTC	59	10.41 s	0	506 ms	3.45 MB	3/3	±11	2,402 -3%	27.1s	Wayback
Aug 23, 2026, 6:39 AM UTC	63	9.46 s	0	378 ms	3.45 MB	3/3	±13	3,233 +30%	71.9s	Wayback
Aug 22, 2026, 6:38 AM UTC	62	10.41 s	0	417 ms	3.45 MB	3/3	±8	2,497 +1%	167.2s	Wayback
Aug 21, 2026, 5:44 AM UTC	61	10.66 s	0.016	439 ms	3.60 MB	3/3	±18	2,494 0%	120.7s	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

Without JavaScript

Page health

Axe violations axe-core 4.13.0, full rule set

Best Practices failures 2 of 18 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