memory-footprint

Which of the following is better in terms of performance and efficient memory usage? Boolean isItTrue(arg){ return Boolean.TRUE; } boolean isItTrue(arg){ return Boolean.TRUE } Boolean isItTrue(arg){ return true; } boolean isItTrue(arg){ return true; } It should be faster and easier to work with primitive types, but on the other hand, when using a reference to a static object, no new value is created. Or is it optimized on compiler level and all true and false are replaced by references to the static objects to save memory? Firstly, the performance advantage of using any one over the others is

I would like to get the total physical memory, the CPU usage, and and the amount of memory being used. I have looked into Runtime.freeMemory() , but that isn't the free memory for the whole system. I know I'm late with my answer, but I think this code is interesting. This is an adaptation of "closed" code, and should be revised before aplying directly: import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; import java.lang.Process; import java.lang.Runtime; import java.util.HashMap; /** * SystemStatusReader is a collection of methods to read system status

Is there a reference for the memory size of Python data stucture on 32- and 64-bit platforms? If not, this would be nice to have it on SO. The more exhaustive the better! So how many bytes are used by the following Python structures (depending on the len and the content type when relevant)? int float reference str unicode string tuple list dict set array.array numpy.array deque new-style classes object old-style classes object ... and everything I am forgetting! (For containers that keep only references to other objects, we obviously do not want to count the size of the item themselves, since