What was the maximum number of requests per second on the highest load service?

The maximum number of requests per second (RPS) on the most high-load service depends on the architecture, technologies used, and optimizations. For example, large industry services can handle millions of RPS.

For instance:

• Google Search processes tens of millions of requests per second.
• Netflix reaches hundreds of thousands of RPS on their APIs.
• In real Go projects, it is possible to reach hundreds of thousands of RPS on a single server with proper optimization.

Achieving such metrics requires:

• Efficient code and minimal processing delay.
• Load balancing and scaling.
• Use of caching, asynchronous processing, and optimal algorithms.

In my experience, high-load Go services stably processed from 100,000 to 500,000 RPS on a cluster of several servers.