roadmap.sh

Ranks Overall #1,749 Astro Showcase #214

Data from Oct 2, 2026, 1:43 PM UTC 9h old Measured once a month · 1 run since Oct 2, 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).

Stack

Built with React Router

Uses React

Hosted by Self-hosted

Lighthouse Scores LAB Simulated

Performance

no change

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 (2026-09-02 → 2026-09-29), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	11.75 s poor	— 11.75 s – 11.75 s	3.02 s needs work	66.7% 18% 15.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	296 ms needs work	56.6% 32.9% 10.5%
CLS CWV Cumulative Layout Shift	0 good	— 0 – 0	0 good	98.1% 1.1% 0.8%
TBT Total Blocking Time	491 ms needs work	— 491 ms – 491 ms	n/a	—
FCP First Contentful Paint	6.05 s poor	— 6.05 s – 6.05 s	2.20 s needs work	66.8% 17.7% 15.5%
Speed Index	6.05 s poor	— 6.05 s – 6.05 s	n/a	—
TTFB Time to First Byte	688 ms good	— 688 ms – 688 ms	719 ms good	78% 14% 8.1%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

11.75 s poor

— 11.75 s – 11.75 s

3.02 s needs work

66.7% 18% 15.3%

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

n/a

—

296 ms needs work

56.6% 32.9% 10.5%

CLS CWV Cumulative Layout Shift

0 good

— 0 – 0

0 good

98.1% 1.1% 0.8%

TBT Total Blocking Time

491 ms needs work

— 491 ms – 491 ms

n/a

—

FCP First Contentful Paint

6.05 s poor

— 6.05 s – 6.05 s

2.20 s needs work

66.8% 17.7% 15.5%

Speed Index

6.05 s poor

— 6.05 s – 6.05 s

n/a

—

TTFB Time to First Byte

688 ms good

— 688 ms – 688 ms

719 ms good

78% 14% 8.1%

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

element render delay 1.26 s

time to first byte 82 ms

LCP LAB Simulated vs LCP FIELD

Lab 11.75 s

Field p75 3.02 s

The lab LCP is 3.89× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	1.69 MB	— 1.69 MB – 1.69 MB
Requests	173	— 173 – 173
Third-party Weight	675 kB	— 675 kB – 675 kB
Third-party CPU	186 ms	— 186 ms – 186 ms
Unused JS	478 kB	— 478 kB – 478 kB
Unused CSS	0 B	— 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

1.69 MB

— 1.69 MB – 1.69 MB

Requests

173

— 173 – 173

Third-party Weight

675 kB

— 675 kB – 675 kB

Third-party CPU

186 ms

— 186 ms – 186 ms

Unused JS

478 kB

— 478 kB – 478 kB

Unused CSS

0 B

— 0 B – 0 B

By resource type

Type	Share	Size	Requests
script	72.9%	1.23 MB	151
image	15.6%	264 kB	3
document	6.4%	109 kB	1
stylesheet	2.8%	48.0 kB	2
other	2.3%	38.4 kB	15
Total		1.69 MB	173

Third parties 7 entities

Entity	Transfer	Size	Main thread Simulated
Google Tag Manager	script	311 kB	102 ms
Google/Doubleclick Ads	script	280 kB	51 ms
Hubspot	script	54.8 kB	17 ms
cdn-cookieyes.com		27.9 kB	16 ms
growthbook.io		900 B	0 ms
All 7		675 kB	186 ms

Entity

Transfer

Size

Main thread Simulated

Google Tag Manager

script

311 kB

102 ms

Google/Doubleclick Ads

script

280 kB

51 ms

Hubspot

script

54.8 kB

17 ms

cdn-cookieyes.com

27.9 kB

16 ms

growthbook.io

900 B

0 ms

All 7

675 kB

186 ms

Page health

Metric	Value	Change / range
Main Thread Work	3.89 s	— 3.89 s – 3.89 s
Long Tasks	17	— 17 – 17
DOM Elements	1,552	— 1,552 – 1,552
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	46	— 46 – 46
A11y Failures	1	— 1 – 1
A11y Failing Nodes	1	— 1 – 1

Metric

Value

Change / range

Trend

Main Thread Work

3.89 s

— 3.89 s – 3.89 s

Long Tasks

— 17 – 17

DOM Elements

1,552

— 1,552 – 1,552

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

— 46 – 46

A11y Failures

— 1 – 1

A11y Failing Nodes

— 1 – 1

Main thread work

Task	Share	Duration Simulated
script evaluation	49%	1.90 s
other	24%	938 ms
style layout	13%	515 ms
script parse compile	7%	258 ms
parse HTML	4%	154 ms
paint composite render	2%	75 ms
garbage collection	1%	49 ms
Total		3.89 s

Task

Time

Duration Simulated

script evaluation

49%

1.90 s

other

24%

938 ms

style layout

13%

515 ms

script parse compile

258 ms

parse HTML

154 ms

paint composite render

75 ms

garbage collection

49 ms

Total

3.89 s

Axe violations axe-core 4.13.0, full rule set

46 violating nodes across 3 rules, 2318 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 44 nodes

Offending elements (5 of 44)

.border-t.sm\:text-center.py-6:nth-child(16) > .max-w-\[650px\]\!.page-container > .text-2xl.sm\:text-5xl.font-bold

<p class="text-2xl font-bold sm:text-5xl"><img alt="Rocket" class="mr-2 hidden h-12 w-12 sm:inline" src="/img/gifs/rocket.gif">Actively Maintained</p>

.mb-2

<p class="mt-1 mb-2 text-sm leading-relaxed text-gray-600 sm:my-5 sm:text-lg">We are always improving our content, adding new resources and adding features to enhance your learning experience.</p>

li:nth-child(1) > .sm\:flex-row.items-start.sm\:items-center > .pr-0.text-right.sm\:w-\[120px\]

<span class="shrink-0 pr-0 text-right text-sm tracking-wide text-gray-500 sm:w-[120px] sm:pr-4">17 Sep, 2026</span>

li:nth-child(1) > .sm\:flex-row.items-start.sm\:items-center > .text-balance.sm\:pl-8.text-gray-900

<span class="text-base font-medium text-balance text-gray-900 sm:pl-8">New Roadmaps, Lesson Packs and UX/UI updates</span>

li:nth-child(2) > .sm\:flex-row.items-start.sm\:items-center > .pr-0.text-right.sm\:w-\[120px\]

<span class="shrink-0 pr-0 text-right text-sm tracking-wide text-gray-500 sm:w-[120px] sm:pr-4">17 Aug, 2026</span>

minor meta-viewport-large — Users should be able to zoom and scale the text up to 500% 1 node
Offending element
1. meta[name="viewport"]
```
<meta name="viewport" content="width=device-width, user-scalable=yes, initial-scale=1.0, maximum-scale=3.0, minimum-scale=1.0">
```

serious svg-img-alt — <svg> elements with an img or image role must have alternative text 1 node

Offending element

svg[role="img"]

<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg" height="24" width="24" class="inline-block h-5 w-5 fill-current">

Accessibility failures 1 of 31 audits

svg-img-alt — SVG elements with an `img` role do not have an accessible text alternative 1 node

Best Practices failures 3 of 19 audits

third-party-cookies — Uses third-party cookies 3 items
errors-in-console — Browser errors were logged to the console 1 item
inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 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
2026-09-26	3.04 s	299 ms	2.21 s	721 ms
2026-09-19	3.05 s	302 ms	2.25 s	738 ms
2026-09-12	3.00 s	295 ms	2.21 s	733 ms
2026-09-05	2.98 s	295 ms	2.19 s	731 ms
2026-08-29	2.96 s	293 ms	2.17 s	734 ms
2026-08-22	2.95 s	287 ms	2.13 s	737 ms
2026-08-15	2.93 s	282 ms	2.09 s	733 ms
2026-08-08	2.93 s	278 ms	2.07 s	732 ms
2026-08-01	2.94 s	279 ms	2.07 s	731 ms
2026-07-25	2.95 s	282 ms	2.08 s	723 ms
2026-07-18	2.99 s	285 ms	2.10 s	724 ms
2026-07-11	3.02 s	286 ms	2.10 s	720 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-09-26

3.04 s

299 ms

2.21 s

721 ms

2026-09-19

3.05 s

302 ms

2.25 s

738 ms

2026-09-12

3.00 s

295 ms

2.21 s

733 ms

2026-09-05

2.98 s

295 ms

2.19 s

731 ms

2026-08-29

2.96 s

293 ms

2.17 s

734 ms

2026-08-22

2.95 s

287 ms

2.13 s

737 ms

2026-08-15

2.93 s

282 ms

2.09 s

733 ms

2026-08-08

2.93 s

278 ms

2.07 s

732 ms

2026-08-01

2.94 s

279 ms

2.07 s

731 ms

2026-07-25

2.95 s

282 ms

2.08 s

723 ms

2026-07-18

2.99 s

285 ms

2.10 s

724 ms

2026-07-11

3.02 s

286 ms

2.10 s

720 ms

Runs

Every stored run for this URL, newest first.

When	Scores	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 2, 2026, 1:43 PM UTC		48	11.75 s	0	491 ms	1.69 MB	3/3	±2	2,487 0%	51.7s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Stack

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐇 Unthrottled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 7 entities

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 1 of 31 audits

Best Practices failures 3 of 19 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Lighthouse Scores LAB Simulated

LCP Subparts LAB Unthrottled

LCP LAB Simulated vs LCP FIELD