If what you are saying is correct, the performance of Java has to be the best-kept secret in the industry. Because you are the only person I've ever heard making such claims seriously.
But this looks more like an apples-to-oranges comparison. You might be talking more about performance in complex business logic, while others are talking about performance in computation.
I can imagine that Java could be faster than C++ or Rust (for the same effort) when the number distinct active tasks is large. But in more traditional performance-critical work, such as HPC or video game engines, there are usually only a limited number of distinct combinations of performance-critical tasks that can be active at the same time. Even if the codebase itself is huge, the performance-critical subset is simple, and the performance advantages from increased control over the execution are cheap.
But this looks more like an apples-to-oranges comparison. You might be talking more about performance in complex business logic, while others are talking about performance in computation.
I can imagine that Java could be faster than C++ or Rust (for the same effort) when the number distinct active tasks is large. But in more traditional performance-critical work, such as HPC or video game engines, there are usually only a limited number of distinct combinations of performance-critical tasks that can be active at the same time. Even if the codebase itself is huge, the performance-critical subset is simple, and the performance advantages from increased control over the execution are cheap.