简单说，因为GC以及Java扩张期拿来宣传的错误实践，使得同样功能的代码，Java的内存占用总是C/C++的4倍上下（上下浮动很大，实际可能是1.x到8倍）。

Community New coffee shop bringing hugs and life lessons at Mercedes-Benz Stadium Java Joy's menu may be small but the lesson behind the cup is a lot bigger.