Do everything in Java…

[John Colvin via Digitalmars-d]

On Sunday, 7 December 2014 at 19:56:49 UTC, Dmitry Olshansky 
wrote:
> 06-Dec-2014 18:33, H. S. Teoh via Digitalmars-d пишет:
>> On Sat, Dec 06, 2014 at 03:26:08PM +0000, Russel Winder via 
>> Digitalmars-d wrote:
>> [...]
>>>>    primitive are passed by value; arrays and user defined 
>>>> types are
>>>> passed by reference only (killing memory usage)
>>>
>>> Primitive types are scheduled for removal, leaving only 
>>> reference
>>> types.
>> [...]
>>
>> Whoa. So they're basically going to rely on JIT to convert 
>> those boxed
>> Integers into hardware ints for performance?
>
> With great success.
>
>> Sounds like I will never
>> consider Java for computation-heavy tasks then...
>
> Interestingly working with JVM for the last 2 years the only 
> problem I've found is memory usage overhead of collections and 
> non-trivial objects. In my tests performance of simple numeric 
> code was actually better with Scala (not even plain Java) then 
> with D (LDC), for instance.

Got an example? I'd be interested to see a numerical-code example 
where the JVM can beat the llvm/gcc backends on a real 
calculation (even if it's a small one).