speedlify2

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

Charts Measurement runs Embed a score

bolt.new

https://bolt.new/

26 91 54 100 ✗AXE ✗CWV

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

Overall #1,521 AI #12 Developer Tooling #94 · 1 measurement · since Aug 31, 2026

Stack

Cloudflare Hosted by Cloudflare

Core Web Vitals field data, url-level

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

LCP 4.36 s poor
INP 793 ms poor
CLS 0.010 good

Lighthouse Scores

26
Performance
no change
91
Accessibility
no change
54
Best Practices
no change
100
SEO
no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 6.61 s.

  1. 826 ms
  2. 1.65 s
  3. 2.48 s
  4. 3.30 s
  5. 4.13 s
  6. 4.96 s
  7. 5.78 s
  8. 6.61 s

Without JavaScript

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

Scripts disabled
As rendered

0.3% of pixels differ — they are nearly identical. 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 Trend
LCP Largest Contentful Paint 20.01 s — — 20.01 s 20.01 s
CLS Cumulative Layout Shift 0.011 — — 0.011 0.011
TBT Total Blocking Time 2.59 s — — 2.59 s 2.59 s
FCP First Contentful Paint 14.69 s — — 14.69 s 14.69 s
Speed Index 14.69 s — — 14.69 s 14.69 s
TTFB Time to First Byte 657 ms — — 657 ms 657 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 1.20 s
resource load duration 275 ms
resource load delay 210 ms
time to first byte 76 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 4.36 s poor 43.2% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 793 ms poor 17.5% good
CLS CWV 0.010 good 93.5% good
FCP 3.77 s poor 29.1% good
TTFB 2.16 s poor 24.9% good

Lab LCP vs Field LCP

Lab 20.01 s
Field p75 4.36 s

The lab LCP is 4.59× 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 LCPINPCLSFCPTTFB
2026-08-29 4.36 s 793 ms 0.010 3.77 s 2.16 s
2026-08-22 4.28 s 760 ms 0.010 3.69 s 2.13 s
2026-08-15 4.25 s 735 ms 0.010 3.66 s 2.11 s
2026-08-08 4.14 s 716 ms 0.010 3.56 s 2.04 s
2026-08-01 3.93 s 711 ms 0.010 3.38 s 1.88 s
2026-07-25 3.70 s 707 ms 0.010 3.22 s 1.73 s
2026-07-18 3.56 s 714 ms 0.010 3.15 s 1.66 s
2026-07-11 3.63 s 731 ms 0.010 3.23 s 1.70 s
2026-07-04 3.87 s 749 ms 0.010 3.41 s 1.85 s
2026-06-27 4.06 s 777 ms 0.010 3.57 s 1.94 s
2026-06-20 4.15 s 801 ms 0.010 3.65 s 1.96 s
2026-06-13 4.14 s 810 ms 0.010 3.68 s 1.94 s

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 5.28 MB — — 5.28 MB 5.28 MB
Requests 400 — — 400 400
Third-party Weight 1.83 MB — — 1.83 MB 1.83 MB
Third-party CPU 543 ms — — 543 ms 543 ms
Unused JS 1.71 MB — — 1.71 MB 1.71 MB
Unused CSS 66.8 kB — — 66.8 kB 66.8 kB

By resource type

  • script 82.4% 4.35 MB · 263 req
  • image 8.9% 471 kB · 35 req
  • font 5.3% 280 kB · 4 req
  • stylesheet 2.6% 139 kB · 18 req
  • document 0.4% 22.9 kB · 1 req
  • other 0.3% 17.9 kB · 39 req

Third parties 24 entities

1.83 MB transferred, 543 ms on the main thread.

Google Tag Manager script 753 kB · 226 ms CPU
Facebook script 178 kB · 104 ms CPU
TikTok script 164 kB · 64 ms CPU
cello.so script 132 kB · 5 ms CPU
staticblitz.com script 123 kB · 25 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 14.26 s — — 14.26 s 14.26 s
Long Tasks 20 — — 20 20
DOM Elements 880 — — 880 880
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 17 — — 17 17
A11y Failures 3 — — 3 3
A11y Failing Nodes 3 — — 3 3

Main thread work

script evaluation 7.48 s
other 3.44 s
style layout 1.68 s
paint composite render 716 ms
script parse compile 559 ms
parse HTML 210 ms
garbage collection 179 ms

Axe violations axe-core 4.13.0, full rule set

17 violating nodes across 4 rules, 619 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 14 nodes
  • serious aria-hidden-focus — ARIA hidden element must not be focusable or contain focusable elements 1 node
  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 1 node
  • moderate landmark-one-main — Document should have one main landmark 1 node

Accessibility failures 3 of 26 audits

  • aria-hidden-focus — `[aria-hidden="true"]` elements contain focusable descendents 1 node
  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 1 node
  • landmark-one-main — Document does not have a main landmark. 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 2 console errors

Measurement log

Every stored run for this URL, newest first.

When PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 31, 2026, 9:00 PM UTC 26 20.01 s 0.011 2.59 s 5.28 MB 3/3 ±0 2,481 0% 187.9s