Earlier quoted context omitted.
https://benchmarksgame.alioth.debian.org/u64q/java.html Consistently twice as slow, with memory usage between 2 and 400(!) times larger. Java is slow and bloated compared to native. Your next argument will be something about how micro-benchmarks don't reflect reality for larger programs...
It's interesting that the "gz" column, which reflects the amount of source code required, shows a very slight trend towards C being smaller, although there are big exceptions like regex-dna and reverse-complement. I'm not seeing the 400x more memory - there is a 40x though. But if you add up the columns for the programs that have both C and Java versions, you get this rough summary... secs KB gz Java 76.33 2004048 12…
>> more memory