How to handle Azure Function cold start latency when using Java with Spring Boot?
I'm having trouble with I've looked through the documentation and I'm still confused about I've searched everywhere and can't find a clear answer... I'm currently deploying a Java-based Azure Function using Spring Boot, but I'm facing significant cold start latency issues. When the function is triggered after a period of inactivity, it takes around 10-15 seconds to respond, which is affecting my application's performance. The function is set up using the Azure Functions Java Library version 2.0.0 and runs on the consumption plan. I've attempted to mitigate this by using the `@FunctionName` annotation along with `@HttpTrigger`, and I'm also pre-warming the functions by invoking them periodically through a timer, but the latency remains a concern. Here's a snippet of my function: ```java import com.microsoft.azure.functions.annotation.*; import com.microsoft.azure.functions.*; public class MyFunction { @FunctionName("myHttpFunction") public HttpResponseMessage run( @HttpTrigger(name = "req", methods = {"get", "post"}, authLevel = AuthorizationLevel.FUNCTION) HttpRequestMessage<Optional<String>> request, ExecutionContext context) { context.getLogger().info("Java HTTP trigger processed a request."); return request.createResponseBuilder(HttpStatus.OK).body("Hello, this is my function!").build(); } } ``` In addition, I've also tried moving some logic to Azure Functions Premium Plan, assuming it would provide a more performant environment, but I still notice cold start delays. I've checked the Azure Portal's Application Insights, and it confirms that the first invocation often spikes in duration. Is there a specific configuration or approach I can take to reduce the cold start time for Azure Functions using Java and Spring Boot? Any insights or best practices would be greatly appreciated! My development environment is macOS. What's the best practice here? What am I doing wrong? The stack includes Java and several other technologies. I'd be grateful for any help. My team is using Java for this desktop app.