Java performance is high as its used an interpreter to execute the bytecodes.

There is also another form of compilation, the just-in-time (JIT) compilers.

These work by compiling the byte 

codes into native code once, caching the results, and then calling them again if needed.

The automatic garbage collector runs as a low-priority background thread, ensuring a high probability that memory is available when required, leading to better performance.


A just-in-time compiler can give you a 10- or even 20-fold speedup for some programs and will almost always be significantly faster than an interpreter