Fix · Speed

The first visit on mobile data is slow

What you may see

The site is fine on Wi-Fi and slow on mobile data

Most likely cause

Phones on mobile data have slower connections and weaker processors, so every extra file and script costs more.

Check first (about two minutes)

Test with the browser's network throttling set to a fast 3G or 4G profile.

The fix prompt

What you type here never leaves your browser. The search runs on this page, and nothing is sent to a server or to an AI.

The exact error or what you see

What you did before it happened

Kept only in this browser, on this device. Keys and passwords are removed before anything is saved.

Prompt language

You are a senior web performance engineer who explains speed problems to people who are not developers. I am not a developer, so explain every step in plain words and tell me exactly which button, menu or command you mean. If you are not sure about something, say so; do not guess.

THE PROBLEM
The first visit on mobile data is slow

THE EXACT ERROR OR WHAT I SEE
[paste the exact error here]

WHAT I DID BEFORE IT HAPPENED
[write in a few words what you did before it happened]

MOST LIKELY CAUSE
Phones on mobile data have slower connections and weaker processors, so every extra file and script costs more.

DO THESE STEPS, IN THIS ORDER
1. Measure the first visit on a throttled phone profile; list the files loaded before the first screen shows.
2. Reduce what is needed for the first screen: smaller hero image, one or two fonts, no heavy scripts or videos before the first screen, defer everything else.
3. Make sure a repeat visit is fast with caching.
Stop and tell me if what you see does not match a step. Do not skip ahead.

CHECK THAT IT WORKED
- On the throttled profile the first screen appears quickly and is usable.
Tell me exactly what I should see on the screen when it works.

DO NOT CHANGE
- Do not hide content to fake speed.
- Anything I did not ask about: the design, the text, other pages, other settings or the data.
- Do not delete files, data or branches, do not reset or force-push, and do not rewrite history, unless you first show me exactly what would be lost and I say yes.
- Do not paste, print or ask me to paste a password or secret key into this chat. If one is needed, tell me which settings page of the right service to store it in.

WHEN YOU FINISH
Explain in simple words what you changed (file by file or setting by setting), why you changed it, and how I can undo it.

Paste it into Claude, ChatGPT, Gemini or Cursor, then follow what it says.

After you tried it, did it work?

Steps

Measure the first visit on a throttled phone profile; list the files loaded before the first screen shows.
Reduce what is needed for the first screen: smaller hero image, one or two fonts, no heavy scripts or videos before the first screen, defer everything else.
Make sure a repeat visit is fast with caching.

Do not do this

Do not test only on fast office Wi-Fi.
Do not hide content to fake speed.

Fix it My website is slow

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