zachleat.com/web/eleventy

https://www.zachleat.com/web/eleventy

Ranks Overall #304 zachleat #12

Data from Sep 14, 2026, 5:50 PM UTC 14h old Measured once a week · 6 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

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Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.

375 ms
750 ms
1.13 s
1.50 s
1.88 s
2.25 s
2.63 s
3.00 s

Lighthouse Scores LAB Simulated

Performance

↓ -2 (-2%)

100

Accessibility

no change

100

Best Practices

no change

100

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 (2026-08-16 → 2026-09-12), origin-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	1.68 s good	↓ -25 ms (-1.5%) 1.68 s – 2.63 s	1.36 s good	89.4% 9.1% 1.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	—	—
CLS CWV Cumulative Layout Shift	0.099 good	↑ +0.049 (+98%) significant 0.035 – 0.099	0 good	99.3% 0.7% 0%
TBT Total Blocking Time	0 ms good	→ no change 0 ms – 12 ms	n/a	—
FCP First Contentful Paint	1.02 s good	↓ -61 ms (-5.7%) 1.02 s – 1.74 s	1.17 s good	90.3% 8.3% 1.4%
Speed Index	1.02 s good	↓ -61 ms (-5.7%) 1.02 s – 1.74 s	n/a	—
TTFB Time to First Byte	625 ms good	↑ +21 ms (+3.5%) 604 ms – 653 ms	883 ms needs work	73% 22.5% 4.5%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

1.68 s good

↓ -25 ms (-1.5%) 1.68 s – 2.63 s

1.36 s good

89.4% 9.1% 1.5%

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

n/a

—

CLS CWV Cumulative Layout Shift

0.099 good

↑ +0.049 (+98%) significant 0.035 – 0.099

0 good

99.3% 0.7% 0%

TBT Total Blocking Time

0 ms good

→ no change 0 ms – 12 ms

n/a

—

FCP First Contentful Paint

1.02 s good

↓ -61 ms (-5.7%) 1.02 s – 1.74 s

1.17 s good

90.3% 8.3% 1.4%

Speed Index

1.02 s good

↓ -61 ms (-5.7%) 1.02 s – 1.74 s

n/a

—

TTFB Time to First Byte

625 ms good

↑ +21 ms (+3.5%) 604 ms – 653 ms

883 ms needs work

73% 22.5% 4.5%

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.

time to first byte 587 ms

element render delay 345 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.68 s

Field p75 1.36 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	175 kB	↑ +17.1 kB (+11.1%) significant 157 kB – 175 kB
Requests	38	↑ +1 (+2.7%) 37 – 38
Third-party Weight	43.4 kB	↓ -37 B (-0.1%) 42.0 kB – 52.0 kB
Third-party CPU	2 ms	↓ -2 ms (-48.8%) significant 2 ms – 4 ms
Unused JS	0 B	→ no change 0 B – 0 B
Unused CSS	0 B	→ no change 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

175 kB

↑ +17.1 kB (+11.1%) significant 157 kB – 175 kB

Requests

↑ +1 (+2.7%) 37 – 38

Third-party Weight

43.4 kB

↓ -37 B (-0.1%) 42.0 kB – 52.0 kB

Third-party CPU

2 ms

↓ -2 ms (-48.8%) significant 2 ms – 4 ms

Unused JS

0 B

→ no change 0 B – 0 B

Unused CSS

0 B

→ no change 0 B – 0 B

By resource type

Type	Share	Size	Requests
font	42.8%	73.2 kB	6
image	24.8%	42.5 kB	19
document	20.7%	35.5 kB	1
script	6.9%	11.9 kB	4
other	2.6%	4.5 kB	4
stylesheet	2.2%	3.7 kB	1
Total		175 kB	38

Third parties 3 entities

Entity	Transfer	Size	Main thread Simulated
11ty.dev	image	38.7 kB	0 ms
zgo.at		4.3 kB	2 ms
goatcounter.com		382 B	0 ms
Total		43.4 kB	2 ms

Entity

Transfer

Size

Main thread Simulated

11ty.dev

image

38.7 kB

0 ms

zgo.at

4.3 kB

2 ms

goatcounter.com

382 B

0 ms

Total

43.4 kB

2 ms

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	642 ms	↑ +19 ms (+3.1%) 545 ms – 642 ms
Long Tasks	1	→ no change 1 – 1
DOM Elements	1,399	↓ -335 (-19.3%) significant 1,399 – 1,787
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 – 1
A11y Failing Nodes	0	→ no change 0 – 1

Metric

Value

Change / range

Trend

Main Thread Work

642 ms

↑ +19 ms (+3.1%) 545 ms – 642 ms

Long Tasks

→ no change 1 – 1

DOM Elements

1,399

↓ -335 (-19.3%) significant 1,399 – 1,787

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

→ no change 0 – 0

A11y Failures

→ no change 0 – 1

A11y Failing Nodes

→ no change 0 – 1

Main thread work

Task	Share	Duration Simulated
other	35%	225 ms
style layout	32%	205 ms
paint composite render	17%	110 ms
script evaluation	10%	61 ms
parse HTML	6%	40 ms
script parse compile	0%	3 ms
Total		642 ms

Task

Time

Duration Simulated

other

35%

225 ms

style layout

32%

205 ms

paint composite render

17%

110 ms

script evaluation

10%

61 ms

parse HTML

40 ms

script parse compile

3 ms

Total

642 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 1950 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

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	CLS	FCP	TTFB
2026-09-05	1.27 s	—	0	1.11 s	831 ms
2026-08-29	1.19 s	—	0	1.05 s	747 ms
2026-08-22	1.11 s	—	0	1.04 s	693 ms
2026-08-15	1.08 s	—	0	1.01 s	693 ms
2026-08-08	1.15 s	—	0	1.08 s	703 ms
2026-08-01	1.09 s	—	0	1.04 s	693 ms
2026-05-23 → 2026-07-25	No data — 10 weeks under the CrUX reporting threshold
2026-05-16	846 ms	—	0	741 ms	557 ms
2026-04-11 → 2026-05-09	No data — 5 weeks under the CrUX reporting threshold
2026-04-04	1.19 s	—	0	920 ms	616 ms
2026-03-28	1.09 s	—	0	856 ms	575 ms
2026-03-21	1.19 s	—	0	955 ms	693 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Sep 14, 2026, 5:50 PM UTC	97	1.68 s	0.099	0 ms	175 kB	3/3	±1	2,538 +2%	49.2s	Wayback
Sep 7, 2026, 2:58 PM UTC	99	1.70 s	0.050	0 ms	157 kB	3/3	±2	2,494 0%	29.2s	Wayback
Aug 31, 2026, 10:44 AM UTC	98	1.75 s	0.070	0 ms	172 kB	3/3	±0	2,349 -5%	28.2s	Wayback
Aug 23, 2026, 10:22 PM UTC	98	2.03 s	0.042	0 ms	170 kB	3/3	±0	2,501 +1%	29.9s	Wayback
Aug 22, 2026, 9:22 PM UTC	99	1.75 s	0.070	0 ms	164 kB	3/3	±9	2,770 +12%	30.6s	Wayback
Aug 21, 2026, 8:29 PM UTC	97	2.63 s	0.035	12 ms	164 kB	3/3	±3	2,491 0%	30.1s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Embed this score

Use this web component to show zachleat.com/web/eleventy's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site!

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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

Hygiene

Measurement log

Field history 25 weeks

Runs

Embed this score

Filmstrip LAB Throttled

Lighthouse Scores LAB Simulated

LCP Subparts LAB Throttled

LCP LAB Simulated vs LCP FIELD