Reducing connection wait time for APIs in Flutter

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I'm trying to optimize API response time for my Flutter app. I have an API where I've added server level caching and I'm using Dio for my API needs.

The reponse time when tested on Postman is ~100ms. Getting similar metrics on Chrome developer tools.

The problems is when I measure the response time on Flutter DevTools, all responses are >250ms. Upon checking, I find that there's a connection wait time of ~200ms for every request.

How can I reduce the above wait time for Flutter?

I tried switching libraries and reusing the same https client as suggested here and in the docs of http but the wait time for subsequent requests remained similar.

var client = http.Client();
final res = await client.get(...);

How can I avoid these connection delays and get the optimum performance? If caching the SSL, DNS Lookup etc is the solution, how do I do that in flutter?

Mar 14, 2023 in Android by anonymous
• 780 points
1,258 views

1 answer to this question.

0 votes

To reduce connection wait time for APIs in Flutter, you can:

  1. Use a connection pool to reuse existing connections
  2. Enable compression to reduce the size of requests and responses
  3. Enable SSL pinning to validate SSL certificates
  4. Use a Content Delivery Network (CDN) to cache frequently accessed resources
  5. Use Flutter profiling tools to identify bottlenecks in your code
To know more, join our Flutter Certification Course today.
answered Mar 18, 2023 by pooja

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