v8.dev

https://v8.dev/

Data from Aug 21, 2026, 10:29 AM UTC — 8h old.

Built Awesome · 1 measurement · since Aug 21, 2026 · last attempt 8h

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-23 → 2026-08-19). This is what Google measures you on.

LCP 962 ms good

INP 80 ms good

CLS 0 good

Scores

100

Performance

no change

100

Accessibility

no change

100

Best Practices

no change

100

SEO

no change

Lab metrics Lighthouse, mobile

Metric	Current	Previous	Change	Best	Worst
LCP Largest Contentful Paint	769 ms	—	—	769 ms	769 ms
CLS Cumulative Layout Shift	0	—	—	0	0
TBT Total Blocking Time	0 ms	—	—	0 ms	0 ms
FCP First Contentful Paint	769 ms	—	—	769 ms	769 ms
Speed Index	769 ms	—	—	769 ms	769 ms
TTFB Time to First Byte	602 ms	—	—	602 ms	602 ms

What LCP is made of

A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.

element render delay 43 ms

time to first byte 4 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-23 → 2026-08-19). This is what Google measures you on.

Metric	p75	Rating	Distribution (good / needs work / poor)
LCP CWV	962 ms	good	94.9% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run	80 ms	good	94.8% good
CLS CWV	0	good	95.7% good
FCP	973 ms	good	91% good
TTFB	645 ms	good	79.5% good

Metric

p75

Rating

Distribution (good / needs work / poor)

LCP CWV

962 ms

good

94.9% good

INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run

80 ms

good

94.8% good

CLS CWV

good

95.7% good

FCP

973 ms

good

91% good

TTFB

645 ms

good

79.5% good

Lab vs field

Lab LCP 769 ms · field p75 962 ms · real users are 1.25× slower than the lab.

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	FCP	TTFB
2026-08-15	970 ms	82 ms	977 ms	648 ms
2026-08-08	937 ms	82 ms	936 ms	630 ms
2026-08-01	893 ms	87 ms	898 ms	572 ms
2026-07-25	893 ms	84 ms	896 ms	573 ms
2026-07-18	887 ms	84 ms	896 ms	582 ms
2026-07-11	859 ms	84 ms	880 ms	558 ms
2026-07-04	872 ms	79 ms	900 ms	603 ms
2026-06-27	861 ms	77 ms	871 ms	585 ms
2026-06-20	851 ms	74 ms	866 ms	570 ms
2026-06-13	862 ms	70 ms	866 ms	614 ms
2026-06-06	841 ms	73 ms	848 ms	612 ms
2026-05-30	850 ms	73 ms	870 ms	567 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-08-15

970 ms

82 ms

977 ms

648 ms

2026-08-08

937 ms

82 ms

936 ms

630 ms

2026-08-01

893 ms

87 ms

898 ms

572 ms

2026-07-25

893 ms

84 ms

896 ms

573 ms

2026-07-18

887 ms

84 ms

896 ms

582 ms

2026-07-11

859 ms

84 ms

880 ms

558 ms

2026-07-04

872 ms

79 ms

900 ms

603 ms

2026-06-27

861 ms

77 ms

871 ms

585 ms

2026-06-20

851 ms

74 ms

866 ms

570 ms

2026-06-13

862 ms

70 ms

866 ms

614 ms

2026-06-06

841 ms

73 ms

848 ms

612 ms

2026-05-30

850 ms

73 ms

870 ms

567 ms

Page weight

Metric	Current	Previous	Change	Best	Worst
Page Weight	17.3 kB	—	—	17.3 kB	17.3 kB
Requests	9	—	—	9	9
Third-party Weight	0 B	—	—	0 B	0 B
Third-party CPU	0 ms	—	—	0 ms	0 ms
Unused JS	0 B	—	—	0 B	0 B
Unused CSS	0 B	—	—	0 B	0 B

By resource type

other 7.8 kB · 3 req

script 3.0 kB · 2 req

stylesheet 3.0 kB · 1 req

image 2.0 kB · 2 req

document 1.5 kB · 1 req

Page health

Metric	Current	Previous	Change	Best	Worst
Main Thread Work	175 ms	—	—	175 ms	175 ms
Long Tasks	0	—	—	0	0
DOM Elements	103	—	—	103	103
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset	1	—	—	1	1
A11y Failures	0	—	—	0	0
A11y Failing Nodes	0	—	—	0	0

Main thread work

other 102 ms

style layout 33 ms

script evaluation 22 ms

paint composite render 9 ms

parse HTML 6 ms

script parse compile 3 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 215 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.

minor empty-heading — Headings should not be empty 1 node

Hygiene

Changes rarely — which is exactly why a change is worth noticing.

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took
Aug 21, 2026, 10:29 AM UTC	100	769 ms	0	0 ms	17.3 kB	3/3	±0	2,471	20.1s

When

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Aug 21, 2026, 10:29 AM UTC

100

769 ms

0 ms

17.3 kB

3/3

±0

2,471

20.1s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show v8.dev's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify-score.js component code into your site!

<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://v8.dev/"></speedlify-score>