Can you how me some evidence that Java uses 3x the memory? Sure OO heap spam with Java is certainty possible, but the same code written the same way in both languages wont have that much memory difference.
That just notes the max amount of memory used, but not the actual memory it needs. If Java has memory available it makes sense that it uses it instead of spending time cleaning up unused objects.
In addition I have a feeling that these benchmarks are comparing short lived processes. Java does take a bit longer than some other languages to start unless you use native. But that doesn't matter much when you are running long lived services.
