That doesn't say much about performance. Languages that do need a runtime, like Java, aren't slower than C++ because of the virtual machine per se (which otherwise does a good job at doing awesome optimizations that are only possible with runtime profiling), but rather the reliance on a garbage collector and the lack of options for fine tuning the memory layout / access patterns and unfortunately the runtime is not smart enough yet to do that for you. Every language that depends on a GC, but that wants to be close to C/C++ in performance, starts with this handicap, even though for most purposes an efficient garbage collector will behave much better than inefficient usage of malloc or a half-assed object pool.
Of course I wouldn't worry about Rust's performance either.
That doesn't say much about performance. Languages that do need a runtime, like Java, aren't slower than C++ because of the virtual machine per se (which otherwise does a good job at doing awesome optimizations that are only possible with runtime profiling), but rather the reliance on a garbage collector and the lack of options for fine tuning the memory layout / access patterns and unfortunately the runtime is not smart enough yet to do that for you. Every language that depends on a GC, but that wants to be close to C/C++ in performance, starts with this handicap, even though for most purposes an efficient garbage collector will behave much better than inefficient usage of malloc or a half-assed object pool.
Of course I wouldn't worry about Rust's performance either.