zachleat.com/twitter

https://www.zachleat.com/twitter

Ranks Overall #397 zachleat #14

Data from Oct 6, 2026, 5:11 AM UTC 2d old Measured once a week · 9 runs since Aug 21, 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

Hosted by Netlify

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

100

Performance

no change

100

Accessibility

no change

100

Best Practices

no change

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 (2026-09-06 → 2026-10-03), origin-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	1.28 s good	↑ +199 ms (+18.4%) 1.08 s – 1.60 s	1.04 s good	96.9% 2.2% 0.9%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	87 ms good	94.8% 5.2% 0%
CLS CWV Cumulative Layout Shift	0.044 good	→ no change 0.044 – 0.044	0 good	99.1% 0.9% 0%
TBT Total Blocking Time	0 ms good	→ no change 0 ms – 0 ms	n/a	—
FCP First Contentful Paint	844 ms good	↓ -10 ms (-1.2%) 829 ms – 856 ms	996 ms good	93.4% 4.9% 1.8%
Speed Index	844 ms good	↓ -10 ms (-1.2%) 829 ms – 856 ms	n/a	—
TTFB Time to First Byte	604 ms good	↓ -26 ms (-4.1%) 604 ms – 630 ms	637 ms good	80.7% 15.5% 3.8%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

1.28 s good

↑ +199 ms (+18.4%) 1.08 s – 1.60 s

1.04 s good

96.9% 2.2% 0.9%

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

n/a

—

87 ms good

94.8% 5.2% 0%

CLS CWV Cumulative Layout Shift

0.044 good

→ no change 0.044 – 0.044

0 good

99.1% 0.9% 0%

TBT Total Blocking Time

0 ms good

→ no change 0 ms – 0 ms

n/a

—

FCP First Contentful Paint

844 ms good

↓ -10 ms (-1.2%) 829 ms – 856 ms

996 ms good

93.4% 4.9% 1.8%

Speed Index

844 ms good

↓ -10 ms (-1.2%) 829 ms – 856 ms

n/a

—

TTFB Time to First Byte

604 ms good

↓ -26 ms (-4.1%) 604 ms – 630 ms

637 ms good

80.7% 15.5% 3.8%

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.

element render delay 786 ms

time to first byte 569 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.28 s

Field p75 1.04 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	846 kB	↑ +530.9 kB (+179.8%) 190 kB – 846 kB
Requests	19	↓ -4 (-17.4%) 19 – 23
Third-party Weight	6.2 kB	↓ -1 B 4.8 kB – 6.2 kB
Third-party CPU	0 ms	→ no change 0 ms – 0 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

846 kB

↑ +530.9 kB (+179.8%) 190 kB – 846 kB

Requests

↓ -4 (-17.4%) 19 – 23

Third-party Weight

6.2 kB

↓ -1 B 4.8 kB – 6.2 kB

Third-party CPU

0 ms

→ no change 0 ms – 0 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
media	92.1%	779 kB	2
image	4.7%	40.0 kB	4
script	1.9%	16.0 kB	3
document	0.7%	6.1 kB	1
stylesheet	0.5%	4.4 kB	2
Total		846 kB	19

Third parties 1 entities

Entity	Transfer	Size	Main thread Simulated
11ty.dev	image	6.2 kB	0 ms
Total		6.2 kB	0 ms

Entity

Transfer

Size

Main thread Simulated

11ty.dev

image

6.2 kB

0 ms

Total

6.2 kB

0 ms

Without JavaScript

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

8.2% of pixels differ — they are nearly 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	506 ms	↓ -35 ms (-6.4%) 439 ms – 541 ms
Long Tasks	0	↓ -1 (-100%) significant 0 – 1
DOM Elements	547	→ no change 547 – 547
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

506 ms

↓ -35 ms (-6.4%) 439 ms – 541 ms

Long Tasks

↓ -1 (-100%) significant 0 – 1

DOM Elements

547

→ no change 547 – 547

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

Main thread work

Task	Share	Duration Simulated
style layout	40%	203 ms
other	34%	172 ms
paint composite render	13%	66 ms
script evaluation	8%	42 ms
parse HTML	4%	20 ms
script parse compile	1%	4 ms
Total		506 ms

Task

Time

Duration Simulated

style layout

40%

203 ms

other

34%

172 ms

paint composite render

13%

66 ms

script evaluation

42 ms

parse HTML

20 ms

script parse compile

4 ms

Total

506 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 1278 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

SEO failures 1 of 9 audits

canonical — Document does not have a valid `rel=canonical`

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
2026-09-26	1.09 s	88 ms	0	1.08 s	702 ms
2026-09-19	1.20 s	—	0	1.08 s	829 ms
2026-09-12	1.36 s	—	0	1.17 s	883 ms
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

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	Weight	Runs	Spread	Bench	Took	Archive
Oct 6, 2026, 5:11 AM UTC	100	1.28 s	0.044	846 kB	3/3	±1	2,507 +1%	47.7s	Wayback
Sep 28, 2026, 11:53 PM UTC	100	1.08 s	0.044	302 kB	3/3	±0	2,400 -3%	47.7s	Wayback
Sep 21, 2026, 8:01 PM UTC	100	1.60 s	0.044	844 kB	3/3	±1	2,326 -6%	49s	Wayback
Sep 14, 2026, 5:56 PM UTC	100	1.55 s	0.044	285 kB	3/3	±1	2,685 +8%	49.2s	Wayback
Sep 7, 2026, 3:04 PM UTC	100	1.59 s	0.044	845 kB	3/3	±0	2,318 -7%	28.4s	Wayback
Aug 31, 2026, 10:44 AM UTC	100	1.59 s	0.044	845 kB	3/3	±0	2,491 0%	27.4s	Wayback
Aug 23, 2026, 6:27 PM UTC	100	1.23 s	0.044	291 kB	3/3	±8	2,451 -1%	30.9s	Wayback
Aug 22, 2026, 5:19 PM UTC	100	1.56 s	0.044	190 kB	3/3	±3	3,362 +35%	29.5s	Wayback
Aug 21, 2026, 4:33 PM UTC	100	1.23 s	0.044	353 kB	3/3	±29	2,641 +6%	29.8s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Embed this score

Use this web component to show zachleat.com/twitter'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!

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://www.zachleat.com/twitter"></speedlify2-score>

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 1 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

SEO failures 1 of 9 audits

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