speedlify2

Lighthouse lab metrics and Chrome UX Report field data for a list of sites, recorded on every run and compared over time.

Measurement runs · Embed a score · Field data from the Chrome UX Report ·

heyflow.com

https://heyflow.com/

42 92 58 100 ✗CWV 1AXE

Data from Aug 20, 2026, 11:25 PM UTC — 19h old.

Built Awesome · 1 measurement · since Aug 20, 2026 · last attempt 19h

Stack

Detected on the same page load as the accessibility pass — the generator from <meta name="generator"> or the shape of the page, the host from response headers.

Cloudflare Hosted by Cloudflare

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-22 → 2026-08-18). This is what Google measures you on.

LCP 2.18 s good
INP 514 ms poor
CLS 0.020 good

Scores

42
Performance
no change
92
Accessibility
no change
58
Best Practices
no change
100
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 20.63 s — — 20.63 s 20.63 s
CLS Cumulative Layout Shift 0.030 — — 0.030 0.030
TBT Total Blocking Time 1.57 s — — 1.57 s 1.57 s
FCP First Contentful Paint 1.10 s — — 1.10 s 1.10 s
Speed Index 6.85 s — — 6.85 s 6.85 s
TTFB Time to First Byte 638 ms — — 638 ms 638 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.

resource load delay 1.15 s
element render delay 414 ms
time to first byte 96 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-22 → 2026-08-18). This is what Google measures you on.

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 2.18 s good 77.9% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 514 ms poor 45% good
CLS CWV 0.020 good 95.6% good
FCP 1.74 s good 75.8% good
TTFB 810 ms needs-improvement 75.1% good

Lab vs field

Lab LCP 20.63 s · field p75 2.18 s · real users are 0.11× faster than the lab.

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-08-15 2.35 s 555 ms 0.020 1.80 s 862 ms
2026-08-08 2.60 s 495 ms 0.020 1.87 s 924 ms
2026-08-01 2.48 s 441 ms 0.020 1.76 s 907 ms
2026-07-25 2.27 s 467 ms 0.020 1.73 s 880 ms
2026-07-18 2.77 s 473 ms 0.030 2.13 s 1.38 s
2026-07-11 2.37 s 548 ms 0.030 2.14 s 1.35 s
2026-07-04 2.18 s 593 ms 0.030 2.13 s 1.44 s
2026-06-27 2.06 s 562 ms 0.030 2.00 s 1.30 s
2026-06-20 1.69 s 565 ms 0.020 1.70 s 789 ms
2026-06-13 1.62 s 510 ms 0.030 1.65 s 663 ms
2026-06-06 1.64 s 422 ms 0.030 1.61 s 585 ms
2026-05-30 1.46 s 372 ms 0.020 1.45 s 538 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 12.41 MB — — 12.41 MB 12.41 MB
Requests 201 — — 201 201
Third-party Weight 6.93 MB — — 6.93 MB 6.93 MB
Third-party CPU 565 ms — — 565 ms 565 ms
Unused JS 573.6 kB — — 573.6 kB 573.6 kB
Unused CSS 18.5 kB — — 18.5 kB 18.5 kB

By resource type

image 7.47 MB · 124 req
media 3.22 MB · 1 req
script 1.58 MB · 38 req
font 67.2 kB · 2 req
document 44.5 kB · 3 req
other 24.0 kB · 32 req
third party 6.93 MB · 142 req

Third parties 15 entities

6.93 MB transferred, 565 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Cloudinary 5.55 MB · 0 ms CPU
Google Tag Manager 669.5 kB · 230 ms CPU
Facebook 250.7 kB · 125 ms CPU
Hubspot 130.7 kB · 67 ms CPU
Usercentrics CMP 118.4 kB · 27 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 12.12 s — — 12.12 s 12.12 s
Long Tasks 20 — — 20 20
DOM Elements 1,005 — — 1,005 1,005
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 1 — — 1 1
A11y Failures 3 — — 3 3
A11y Failing Nodes 10 — — 10 10

Main thread work

script evaluation 5.07 s
other 3.04 s
style layout 2.16 s
paint composite render 1.00 s
script parse compile 640 ms
garbage collection 146 ms
parse HTML 57 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 73 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.

  • critical meta-refresh — Delayed refresh under 20 hours must not be used 1 node

Accessibility failures 3 of 28 audits

Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.

  • target-size — Touch targets do not have sufficient size or spacing. 8 nodes
  • list — Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`). 1 node
  • svg-img-alt — SVG elements with an `img` role do not have an accessible text alternative 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 PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 20, 2026, 11:25 PM UTC 42 20.63 s 0.030 1.57 s 12.41 MB 3/3 ±7 2,482 65.2s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show heyflow.com'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://heyflow.com/"></speedlify-score>