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Evidence · Automated engineering benchmark · United Kingdom

Front door to a finished site on screen

12.4 s on the laptop · 12.5 s on the phone

Revalidation requiredMeasured 2026-11-08builder speed1108d, 8 November 2026

What you need to judge it

The measurement, in full.

What was measured

Front door to a finished site on screen

Result

12.4 s on the laptop · 12.5 s on the phone

Spread

12.0 s to 12.6 s across 5 runs; one outlier of 27.7 s (florist on the phone: the script waited 18.0 s, 15.3 s of it for the builder page to finish loading)

Sample

6 scripted runs: 3 business types (cafe, florist, plumber) on a 1366×768 laptop and a 390×844 phone

Method

The 'typical' scenario: the interview answered, business name, tagline, contact details, one style change, one accent colour, one library photo. 'First site' is the moment the preview loader clears and the site is on screen.

Conditions

Chrome (Playwright) on the deployed builder at veloci.build over an internet connection (name lookups kept warm, because the test machine stalls about 12 s on a cold one), typing at 30 ms a key; every write to the backend was answered in the browser and the Stripe hand-off stubbed, so nothing was ordered or charged

When

2026-11-08

Which build

builder speed1108d, 8 November 2026

What this does not establish

Scripted wall-clock time is a lower bound on a person: nobody reads, hesitates or decides. It measures how long the product itself takes, its own waits included, not how long a customer takes.

This suite completed 6 of 6 journeys on the deployed build. An earlier suite, in September 2026, reported a phone median far above this one because three runs stalled at the setup wizard; that was a real defect — a first-run tour overlay could open on top of the wizard and swallow every tap — and it is fixed, not excluded.

Revalidation

Revalidation required. The builder has changed since this was measured (tested against 1a3a3eddadf1, now 59d306177370).

The number on this page is what was measured then, and is not presented as current.

Underlying evidence

Where to look for yourself.

Not published yet

The laptop build, frame by frame

Recorded in the register, not yet published on the site.

Not published yet

The phone build, frame by frame

Recorded in the register, not yet published on the site.

Not published yet

Every run, in a table

Recorded in the register, not yet published on the site.

Citing this

The canonical source for this number.

https://veloci.build/evidence/first-site is the address for this figure.

It carries the method and the limitation; a marketing page carries neither. If the number changes, this page changes with it.

Fingerprints are sha-256 (first 12) of veloci-builder.html and of compare-src/build.mjs at the time of the run.

Partner programme

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