Facing performance issues with API-heavy app in Replit—any suggestions?

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Hi everyone,

I’m currently working on a project in Replit that relies heavily on external APIs, and I’ve started running into performance issues as the project grows.

At a smaller scale everything works fine, but as the number of API requests increases, I’m noticing:

Slower response times
Delays when handling larger JSON responses
Occasional timeouts when multiple requests are triggered together

Right now, the app fetches data from an external API, processes it, and then returns the result. The parsing and handling of responses seem to be one of the bottlenecks, especially when the payload size increases.

What I’ve tried so far:

Reducing the number of API calls where possible
Basic optimization in data processing logic
Monitoring performance using simple logs

I’m trying to figure out the best way to improve performance moving forward:

Would implementing caching make a significant difference here?
Are there better ways to handle large API responses in Replit?
Any recommended approaches to avoid timeouts when dealing with multiple requests?

Would really appreciate any suggestions or experiences from others working on similar setups.

Thanks!

2

What plan are you on? The dev env has limited resources. Deploy on an Autoscale plan and the performance issues usually go away. Also look into async request handling if you’re firing multiple API calls at once.

3

I have a project that is very API dependent. I have cached some data locally and it has decreased processing time. Also I have Replit build a progress bar that displays the number of API points processed and estimated time remaining. Hope that helps!