Optimize a Java program that processes large CSV files with Ai

Question

I’m trying to optimize a Java program that processes large CSV files, but I keep running into performance bottlenecks and memory issues. I want to improve both speed and memory usage without completely rewriting the code.

I’ve been experimenting with AI tools like:

• https://chat.openai.com/ (ChatGPT)

• https://gemini.google.com/app (Google Gemini)

• https://grok.com/ (xAI Grok)

• https://chat.deepseek.com/ (DeepSeek)

How can I use these AI platforms effectively to:

1. Identify slow parts of the code (profiling hints)

2. Suggest memory-efficient alternatives for large data processing

3. Refactor loops and streams for better performance

Are there any best practices for integrating AI suggestions into real Java projects without blindly copying code? Examples or step-by-step approaches would be really helpful.

Answer 1

Hello! I've been also expermenting with AI's like chatgpt, I recommend Chatgpt for just step by step questions, like innocent ones like "How do I use random in JS" or smth like that.  

if you run into errors you can tell chatgpt your problems. an example I did was asking chatgpt "How do I use time in C++" or "How do I use random in C++". you can get chatgpt to rewrite your code but if your confused on some parts of the code you should ask it about the parts your confused about.

If you have any more questions please ask me!

Answer 2

You can just ask the AI tools these exact questions. They should look at your code and identify what they think is an issue.

The normal way to go about things is to run a performance analyzer and find out what an issue is, after you've got actual measurements of your code execution.

Answer 3

Honestly if you setup pagination i think it solves both problems. Since you work with very large CSV files, lets say a ~10GB-ish one you could load 5GBs of it and later load another 5GBs after processing. I dont think you will have to rewrite everything too. You can do it with Apache Commons or Java NIO.