perplexity.ai

https://www.perplexity.ai/

Data from Aug 31, 2026, 9:00 PM UTC 9h old

Overall #1,496 AI #9 Developer Tooling #87 · 1 measurement · since Aug 31, 2026

Stack

Hosted by Cloudflare

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-08-02 → 2026-08-29).

LCP 5.90 s poor

INP 444 ms needs-improvement

CLS 0.050 good

Lighthouse Scores

Performance

no change

Accessibility

no change

Best Practices

no change

100

SEO

no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

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

Without JavaScript

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

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

74.4% of pixels differ — the page changes substantially. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric	Current	Previous	Change	Best	Worst
LCP Largest Contentful Paint	15.95 s	—	—	15.95 s	15.95 s
CLS Cumulative Layout Shift	0	—	—	0	0
TBT Total Blocking Time	1.67 s	—	—	1.67 s	1.67 s
FCP First Contentful Paint	9.45 s	—	—	9.45 s	9.45 s
Speed Index	9.45 s	—	—	9.45 s	9.45 s
TTFB Time to First Byte	629 ms	—	—	629 ms	629 ms

LCP Subparts lab observed, unthrottled

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

element render delay 2.23 s

time to first byte 56 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-08-02 → 2026-08-29).

Metric	p75	Rating	Distribution (good / needs work / poor)
LCP CWV	5.90 s	poor	35.3% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run	444 ms	needs-improvement	39.9% good
CLS CWV	0.050	good	94.2% good
FCP	4.30 s	poor	31.6% good
TTFB	712 ms	good	77.3% good

Metric

p75

Rating

Distribution (good / needs work / poor)

LCP CWV

5.90 s

poor

35.3% good

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

444 ms

needs-improvement

39.9% good

CLS CWV

0.050

good

94.2% good

FCP

4.30 s

poor

31.6% good

TTFB

712 ms

good

77.3% good

Lab LCP vs Field LCP

Lab 15.95 s

Field p75 5.90 s

The lab LCP is 2.7× the field p75 — real users likely have above-average hardware or network connectivity.

Field history 25 weeks

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

Week ending	LCP	INP	CLS	FCP	TTFB
2026-08-29	5.90 s	444 ms	0.050	4.30 s	712 ms
2026-08-22	5.79 s	443 ms	0.050	4.21 s	702 ms
2026-08-15	5.69 s	444 ms	0.050	4.13 s	695 ms
2026-08-08	5.21 s	463 ms	0.040	3.67 s	677 ms
2026-08-01	5.22 s	478 ms	0.030	3.57 s	674 ms
2026-07-25	5.38 s	480 ms	0.030	3.57 s	678 ms
2026-07-18	5.61 s	483 ms	0.030	3.62 s	681 ms
2026-07-11	6.16 s	475 ms	0.030	3.95 s	694 ms
2026-07-04	6.32 s	458 ms	0.030	4.09 s	693 ms
2026-06-27	6.11 s	459 ms	0.030	4.10 s	677 ms
2026-06-20	5.85 s	453 ms	0.020	4.05 s	663 ms
2026-06-13	5.63 s	452 ms	0.020	4.07 s	659 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-08-29

5.90 s

444 ms

0.050

4.30 s

712 ms

2026-08-22

5.79 s

443 ms

0.050

4.21 s

702 ms

2026-08-15

5.69 s

444 ms

0.050

4.13 s

695 ms

2026-08-08

5.21 s

463 ms

0.040

3.67 s

677 ms

2026-08-01

5.22 s

478 ms

0.030

3.57 s

674 ms

2026-07-25

5.38 s

480 ms

0.030

3.57 s

678 ms

2026-07-18

5.61 s

483 ms

0.030

3.62 s

681 ms

2026-07-11

6.16 s

475 ms

0.030

3.95 s

694 ms

2026-07-04

6.32 s

458 ms

0.030

4.09 s

693 ms

2026-06-27

6.11 s

459 ms

0.030

4.10 s

677 ms

2026-06-20

5.85 s

453 ms

0.020

4.05 s

663 ms

2026-06-13

5.63 s

452 ms

0.020

4.07 s

659 ms

Page weight

Metric	Current	Previous	Change	Best	Worst
Page Weight	2.28 MB	—	—	2.28 MB	2.28 MB
Requests	133	—	—	133	133
Third-party Weight	321 kB	—	—	321 kB	321 kB
Third-party CPU	6 ms	—	—	6 ms	6 ms
Unused JS	531 kB	—	—	531 kB	531 kB
Unused CSS	75.5 kB	—	—	75.5 kB	75.5 kB

By resource type

script font other

script 60% 1.37 MB · 88 req
font 18.9% 430 kB · 3 req
other 15.6% 355 kB · 35 req
stylesheet 3.9% 88.1 kB · 1 req
image 1.2% 27.8 kB · 2 req
document 0.3% 7.7 kB · 2 req

Third parties 4 entities

321 kB transferred, 6 ms on the main thread.

eppo.cloud other 309 kB · 0 ms CPU

Cloudflare 9.8 kB · 6 ms CPU

browser-intake-datadoghq.com 1.4 kB · 0 ms CPU

singular.net 746 B · 0 ms CPU

Page health

Metric	Current	Previous	Change	Best	Worst
Main Thread Work	10.41 s	—	—	10.41 s	10.41 s
Long Tasks	20	—	—	20	20
DOM Elements	1,592	—	—	1,592	1,592
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	2	—	—	2	2
A11y Failures	2	—	—	2	2
A11y Failing Nodes	2	—	—	2	2

Main thread work

script evaluation 6.85 s

other 2.37 s

style layout 476 ms

garbage collection 329 ms

paint composite render 183 ms

parse HTML 145 ms

script parse compile 57 ms

Axe violations axe-core 4.13.0, full rule set

2 violating nodes across 2 rules, 231 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 1 node
serious svg-img-alt — <svg> elements with an img or image role must have alternative text 1 node

Accessibility failures 2 of 24 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 1 node
svg-img-alt — SVG elements with an `img` role do not have an accessible text alternative 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 7 console errors

Measurement log

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took
Aug 31, 2026, 9:00 PM UTC	30	15.95 s	0	1.67 s	2.28 MB	3/3	±3	2,409 -3%	93.5s

When

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Aug 31, 2026, 9:00 PM UTC

15.95 s

1.67 s

2.28 MB

3/3

±3

2,409 -3%

93.5s