JOIN US!! persons who hate JAVA!!

Seriously though, you gotta be into S&M if you decide to develop something in Java yourself and you'll be doing part of the job.

Just some examples. cya

Fast C code is generally slow Java code today
(assuming modern JITs).

C is fastest doing everything through array refernces.  In Java non-linear array referenes are expensive. C is slow generally at recursion, Java recursion can be blindingly fast. (Faster then a local array based stack in fact.)

Memory allocation in most C compilers is dirt slow.  Memory allocation in Java is highly highly optimized.