> Does WASM have better performance than the JVM? If not, could it have better performance theoretically? Is it more secure? How much slower than a regular binary would it be? etc.

Hard to answer as they're different domains. In theory, once optimized and JIT'd, the asm could be the same on non-GC'd sections. JVM bytecode is higher level which means it both benefits (i.e. can optimize more) and is hamstrung (i.e. GC). As for a "regular binary", the JVM knows no such thing and really neither does WASM. Also depends on what "regular" is (i.e. what does the code do) and which runtimes you use and how much is AOT'd vs JIT'd vs interpreted.