What is the optimal option for asynchronous interaction? Which solution is not very good in terms of load?

The optimal approach for asynchronous interaction is to use message queues, such as RabbitMQ, Kafka, or AWS SQS. This approach allows:

• Offloading services, as the sender does not wait for an immediate response
• Ensuring reliable message delivery
• Scaling message processing independently

A less efficient solution in terms of load is frequent polling of the server to check data or event readiness. Polling creates constant traffic and server load, even if data has not changed, which is inefficient and can lead to excessive resource consumption.

Example:

// Bad example
while (true) {
  checkForUpdates();
  sleep(1s);
}

// Good example
producer -> message queue -> consumer
// consumer processes messages as they arrive