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Speed up a slow workbook that recalculates every keystroke

Excel Performance intermediate 🤖 ChatGPT 👁 1 views

📝 The Prompt

Act as an Excel performance specialist. I will describe a workbook that has grown slow: roughly 18 sheets, several lookups across 200k+ rows, and volatile functions sprinkled throughout. Without rewriting from scratch, give me a triage plan that finds the top three contributors to recalculation time in under thirty minutes. Tell me which volatile functions to hunt for, how to use the Name Manager and the F9 trick to isolate the worst formula, and which lookup patterns I should replace with index-match or XLOOKUP and why. End with a checklist I can run on any future workbook before it gets this slow, plus the one setting I should change in Excel options to confirm whether the slowness is the file or the machine.

🎯 What this prompt does

This AI prompt helps you speed up a slow workbook that recalculates every keystroke. Designed for performance workflows in the excel category, it's a intermediate-level prompt you can copy directly into ChatGPT to get instant, production-ready results.

Use it when you need a intermediate prompt that produces clear, actionable output without wrestling with trial-and-error wording. Just copy, customize, and run.

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🚀 How to use this prompt

  1. Copy the prompt using the 📋 button above.
  2. Open ChatGPT (or Claude, Gemini, Perplexity, or your preferred LLM).
  3. Paste the prompt into a new chat. Add any extra context about your situation if helpful.
  4. Run the prompt and review the AI's response. Most outputs are usable immediately.
  5. Iterate if needed — if the tone, length, or structure isn't quite right, reply with "make it shorter", "use bullet points", or "make it more formal" and the AI will refine it.

💡 Tips for better results

  • Tailor the prompt to your specific context — the more detail you give, the better the output.
  • If the first output isn't quite right, ask the AI to refine, rewrite, or add more detail — iteration is key.
  • For long outputs, ask for a section at a time (e.g. 'start with the introduction only') to keep quality high.
  • Combine this with other excel prompts to build an end-to-end workflow.
  • Save your favorite variations — small wording tweaks often produce noticeably different results.
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✨ What you'll get

When you run this prompt, expect ChatGPT to return:

  • A directly usable performance output tailored to the details you provided
  • Clear structure (headings, bullets, or numbered sections) that you can drop into your workflow
  • Content that matches your specified tone and context
  • Results in under 30 seconds — no manual drafting required

Need a different angle? Just ask follow-up questions. The AI will adjust without you starting over.

🔄 3 variations to try

1

Make it more formal

Add "Use a formal, professional tone suitable for enterprise clients" at the start of the prompt.

2

Ask for multiple options

Append "Give me 5 alternative versions, each with a different angle or approach." after the main instruction.

3

Request structured output

Add "Return the response as a markdown table (or bullet list, or JSON)" so you can paste the result directly into your docs or code.

🏷 Tags

🔎 Find more prompts like this

Browse 229 more excel prompts or search the full library.

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