GCP Cloud Pub/Sub Delay in Message Delivery Using Java Client Library
I can't seem to get I'm attempting to set up I'm experiencing a significant delay in message delivery with Google Cloud Pub/Sub when using the Java client library (version 1.113.1)... I publish messages to a topic, but they seem to take an unusually long time to be delivered to my subscriber, which is a Cloud Function. I've set up a push subscription, but I'm monitoring the response times and they're not what I expected. Here’s the code I’m using to publish messages: ```java Publisher publisher = Publisher.newBuilder(TopicName.of("my-project-id", "my-topic")). setCredentials(ServiceAccountCredentials.fromStream(new FileInputStream("path/to/credentials.json"))). build(); String message = "Hello, Cloud Pub/Sub!"; PubsubMessage pubsubMessage = PubsubMessage.newBuilder() .setData(ByteString.copyFromUtf8(message)) .build(); ApiFuture<String> future = publisher.publish(pubsubMessage); String messageId = future.get(); System.out.println("Published message ID: " + messageId); ``` I’m also using this code in the Cloud Function to log incoming messages: ```java public void pubSubHandler(PubSubMessage message, @Context Context context) { System.out.println("Received message: " + message.getData().toStringUtf8()); } ``` Despite publishing messages rapidly, I’m observing that the average delivery time is around 30 seconds, which seems excessive. I’ve checked the subscription configuration, and the acknowledgement deadline is set to 10 seconds. I've also ensured that the Cloud Function is deployed in the same region as the Pub/Sub topic. I tried increasing the number of concurrent message handlers in the Cloud Function, but that didn't seem to affect the delivery time. Is there a specific configuration or best practice that I might be missing to improve the message delivery speed? I'm working on a application that needs to handle this. Thanks for any help you can provide! I'm working on a REST API that needs to handle this.