Netty HTTP/2 Performance Issue: Causes, Solutions, and Best Practices

The issue #12827 in Netty's GitHub repository focuses on the performance of Netty's HTTP/2 implementation. The user reported experiencing increased CPU usage and latency when utilizing HTTP/2 compared to HTTP/1.1. They detailed their setup and sought guidance on improving performance.

The Netty team requested further information, such as the specific Netty version and any custom configurations. They offered general advice for optimizing HTTP/2 performance, including using the latest Netty version and enabling compression.

The discussion within the issue explored potential causes for the performance issues, such as the overhead of HTTP/2's binary framing and the management of connections. Some users suggested using alternative HTTP/2 implementations like Jetty or Undertow, while others recommended sticking with Netty and adjusting settings.

Ultimately, the issue underscores the importance of meticulous tuning and testing of HTTP/2 implementations to achieve optimal performance. It also exemplifies the collaborative nature of open-source development, with users and contributors collaborating to resolve complex issues.