mochajs.org

Ranks Overall #743 Developer Tooling #14 Test Runners #2

Data from Sep 14, 2026, 6:02 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

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 Astro 7.2.9

Hosted by Netlify

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.09 s. Compare this filmstrip against another site.

387 ms
773 ms
1.16 s
1.55 s
1.93 s
2.32 s
2.71 s
3.09 s

Lighthouse Scores LAB Simulated

100

Performance

no change

100

Accessibility

no change

100

Best Practices

no change

SEO

no change

Metrics LAB FIELD

Core Web Vitals: passing 2 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	1.72 s good	↑ +156 ms (+10%) significant 1.56 s – 1.85 s	1.40 s good	89.7% 7.7% 2.6%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	—	—
CLS CWV Cumulative Layout Shift	0 good	→ no change 0 – 0	0 good	98.2% 1.8% 0%
TBT Total Blocking Time	0 ms good	↓ -48 ms (-100%) significant 0 ms – 48 ms	n/a	—
FCP First Contentful Paint	920 ms good	↓ -5 ms (-0.5%) 906 ms – 945 ms	1.32 s good	84.4% 8.9% 6.6%
Speed Index	920 ms good	↓ -5 ms (-0.5%) 906 ms – 945 ms	n/a	—
TTFB Time to First Byte	620 ms good	↓ -5 ms (-0.8%) 603 ms – 635 ms	891 ms needs work	71.7% 23.9% 4.4%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

1.72 s good

↑ +156 ms (+10%) significant 1.56 s – 1.85 s

1.40 s good

89.7% 7.7% 2.6%

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

n/a

—

CLS CWV Cumulative Layout Shift

0 good

→ no change 0 – 0

0 good

98.2% 1.8% 0%

TBT Total Blocking Time

0 ms good

↓ -48 ms (-100%) significant 0 ms – 48 ms

n/a

—

FCP First Contentful Paint

920 ms good

↓ -5 ms (-0.5%) 906 ms – 945 ms

1.32 s good

84.4% 8.9% 6.6%

Speed Index

920 ms good

↓ -5 ms (-0.5%) 906 ms – 945 ms

n/a

—

TTFB Time to First Byte

620 ms good

↓ -5 ms (-0.8%) 603 ms – 635 ms

891 ms needs work

71.7% 23.9% 4.4%

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 842 ms

time to first byte 584 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.72 s

Field p75 1.40 s

The lab LCP is 1.23× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	301 kB	↑ +3.0 kB (+1%) 288 kB – 334 kB
Requests	100	→ no change 97 – 111
Third-party Weight	241 kB	↑ +3.1 kB (+1.3%) 229 kB – 274 kB
Third-party CPU	11 ms	↓ -26 ms (-70.6%) significant 11 ms – 37 ms
Unused JS	30.2 kB	→ no change 29.2 kB – 30.3 kB
Unused CSS	0 B	→ no change 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

301 kB

↑ +3.0 kB (+1%) 288 kB – 334 kB

Requests

100

→ no change 97 – 111

Third-party Weight

241 kB

↑ +3.1 kB (+1.3%) 229 kB – 274 kB

Third-party CPU

11 ms

↓ -26 ms (-70.6%) significant 11 ms – 37 ms

Unused JS

30.2 kB

→ no change 29.2 kB – 30.3 kB

Unused CSS

0 B

→ no change 0 B – 0 B

By resource type

Type	Share	Size	Requests
image	67.7%	204 kB	86
script	23.7%	71.3 kB	8
stylesheet	4.3%	12.9 kB	2
document	4%	12.0 kB	1
other	0.4%	1.1 kB	3
Total		301 kB	100

Third parties 4 entities

Entity	Transfer	Size	Main thread Simulated
opencollective.com	image	194 kB	0 ms
Matomo	script	45.1 kB	11 ms
Netlify		1.7 kB	0 ms
shields.io		907 B	0 ms
Total		241 kB	11 ms

Entity

Transfer

Size

Main thread Simulated

opencollective.com

image

194 kB

0 ms

Matomo

script

45.1 kB

11 ms

Netlify

1.7 kB

0 ms

shields.io

907 B

0 ms

Total

241 kB

11 ms

Without JavaScript

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

92% 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	917 ms	↓ -181 ms (-16.5%) significant 655 ms – 1.10 s
Long Tasks	0	↓ -1 (-100%) 0 – 3
DOM Elements	660	→ no change 654 – 682
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	1	→ no change 1 – 1
A11y Failures	0	→ no change 0 – 0
A11y Failing Nodes	0	→ no change 0 – 0

Metric

Value

Change / range

Trend

Main Thread Work

917 ms

↓ -181 ms (-16.5%) significant 655 ms – 1.10 s

Long Tasks

↓ -1 (-100%) 0 – 3

DOM Elements

660

→ no change 654 – 682

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

→ no change 1 – 1

A11y Failures

→ no change 0 – 0

A11y Failing Nodes

→ no change 0 – 0

Main thread work

Task	Share	Duration Simulated
other	55%	507 ms
style layout	16%	143 ms
script evaluation	13%	118 ms
paint composite render	8%	75 ms
parse HTML	5%	48 ms
script parse compile	3%	27 ms
Total		917 ms

Task

Time

Duration Simulated

other

55%

507 ms

style layout

16%

143 ms

script evaluation

13%

118 ms

paint composite render

75 ms

parse HTML

48 ms

script parse compile

27 ms

Total

917 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 803 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 1 node

SEO failures 1 of 8 audits

crawlable-anchors — Links are not crawlable 4 items

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
2026-09-05	1.38 s	—	1.30 s	966 ms
2026-08-29	1.49 s	—	1.38 s	1.09 s
2026-08-22	1.38 s	—	1.30 s	1.09 s
2026-08-15	1.40 s	—	1.30 s	1.05 s
2026-08-08	1.23 s	156 ms	1.23 s	988 ms
2026-08-01	1.14 s	—	1.10 s	985 ms
2026-07-25	1.14 s	142 ms	1.12 s	840 ms
2026-07-18	1.14 s	—	1.13 s	733 ms
2026-07-11	1.31 s	—	1.26 s	746 ms
2026-07-04	1.37 s	—	1.29 s	800 ms
2026-06-27	1.38 s	—	1.33 s	746 ms
2026-06-20	990 ms	—	868 ms	940 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	TBT	Weight	Runs	Spread	Bench	Took	Archive
Sep 14, 2026, 6:02 AM UTC	100	1.72 s	0 ms	301 kB	3/3	±0	2,438 -2%	54.9s	Wayback
Sep 11, 2026, 11:19 PM UTC	100	1.56 s	48 ms	298 kB	3/3	±0	2,437 -2%	56s	Wayback
Sep 9, 2026, 8:43 PM UTC	100	1.57 s	1 ms	298 kB	3/3	±0	3,344 +35%	29.9s	Wayback
Sep 7, 2026, 7:20 PM UTC	100	1.57 s	0 ms	288 kB	3/3	±0	2,487 0%	32.4s	Wayback
Sep 5, 2026, 8:08 AM UTC	100	1.56 s	0 ms	291 kB	3/3	±4	2,335 -6%	31.4s	Wayback
Sep 4, 2026, 1:01 AM UTC	100	1.57 s	0 ms	292 kB	3/3	±3	3,079 +24%	30.7s	Wayback
Sep 2, 2026, 11:12 PM UTC	100	1.74 s	2 ms	309 kB	3/3	±0	2,332 -6%	32.7s	Wayback
Sep 1, 2026, 10:44 PM UTC	100	1.71 s	0 ms	320 kB	3/3	±0	2,291 -8%	31.1s	Wayback
Aug 31, 2026, 9:03 PM UTC	100	1.56 s	0 ms	318 kB	3/3	±5	2,488 0%	36.4s	Wayback
Aug 27, 2026, 4:07 PM UTC	100	1.85 s	0 ms	334 kB	3/3	±11	2,440 -2%	35s	Wayback
Aug 26, 2026, 6:47 AM UTC	100	1.78 s	0 ms	334 kB	3/3	±12	2,467 -1%	37.3s	Wayback
Aug 25, 2026, 6:44 AM UTC	100	1.75 s	0 ms	334 kB	3/3	±15	2,361 -5%	36.3s	Wayback
Aug 24, 2026, 5:37 AM UTC	100	1.81 s	0 ms	334 kB	3/3	±10	2,482 0%	37.2s	Wayback
Aug 23, 2026, 5:28 AM UTC	100	1.77 s	0 ms	334 kB	3/3	±1	2,496 +1%	33s	Wayback
Aug 22, 2026, 5:26 AM UTC	100	1.78 s	1 ms	333 kB	3/3	±10	2,333 -6%	36.3s	Wayback
Aug 21, 2026, 4:45 AM UTC	100	1.78 s	0 ms	334 kB	3/3	±0	2,467 -1%	31.8s	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 4 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

SEO failures 1 of 8 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